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sigma-file-manager.vercel.app

A free, open-source, quickly evolving, modern file manager (explorer) app for Windows and Linux.

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2020
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What is Sigma File Manager?

Sigma File Manager is a free, open-source file manager (explorer) app for Windows and Linux, described on its site as modern and quickly evolving. It aims to replace the built-in file explorer with a sleeker interface, stronger organization tools, and integration with cloud storage such as Dropbox, Google Drive and OneDrive.

What it offers

  • Advanced search: find files or folders and filter by name, type, date modified and more.
  • Dual pane view: browse and manage two locations side by side, useful for moving or copying files between folders.
  • Drag and drop: rearrange and transfer files within the app.
  • Built-in file viewer: preview images, videos, documents and other files without opening a separate application.
  • Archiving: compress and extract formats such as ZIP and RAR.
  • Customizable interface: choose color schemes and layout options.

Who it suits

It is a reasonable fit for Windows or Linux users who regularly move files between folders or cloud accounts and want search, previews and archive handling in one place. Someone who only occasionally opens a document will likely find the default system explorer sufficient.

Trade-offs to weigh

The site labels the current release as an alpha (v2), so expect ongoing changes and possible rough edges rather than a fully settled product. Cloud integration means connecting external accounts, which is convenient but worth considering if you prefer to keep file activity local.

Next step

If you want to try it, download it from the project's GitHub page and test it on a small, non-critical folder first—for example, sorting a downloads folder using dual pane and search—before making it your default file manager.

How does Sigma File Manager compare to the default Windows File Explorer or Linux file manager for everyday file management?

Sigma File Manager is aimed at people who find the default Windows File Explorer or a typical Linux file manager too limited for daily work. Its main differences are dual-pane browsing, built-in search filters, an in-app file viewer, archive handling, and cloud storage connections, all in a customizable interface. The default file managers remain the safer choice for simple, low-risk tasks and for deep operating-system integration.

Where the differences matter

Everyday task Sigma File Manager Default Explorer / Linux file manager
Moving files between two folders Dual pane view lets you browse both locations at once Usually one window at a time, or two windows side by side
Finding a file by name, type or date Built-in search with filters Basic search, often slower or less flexible
Previewing an image, video or document Built-in file viewer Often opens a separate application
Compressing or extracting ZIP/RAR Handled inside the app May need extra software, especially for RAR
Connecting Dropbox, Google Drive or OneDrive Supported according to the site Depends on the OS and separate sync clients
Appearance Color schemes and layout options Limited or tied to system themes

Practical trade-offs

Sigma File Manager is described on its own site as rapidly evolving and currently in an alpha release. That means you get newer features sooner, but you should expect rougher edges and changes between versions. The default file managers are mature, tightly integrated with the operating system, and less likely to surprise you during routine work.

A concrete example: if you regularly sort downloads into project folders while checking cloud-synced documents, the dual pane, search filters and cloud connections can save repeated window switching. If you mostly open a folder, rename a file and move on, the default tool is simpler and involves no extra install.

How to decide

Try Sigma File Manager alongside your default file manager for a week rather than replacing it outright. Keep the default available for system-level tasks, and use Sigma for multi-folder organizing, previewing and archive work. If the alpha status causes problems with important files, fall back to the default until the next release.

The project is distributed via GitHub, and you can read more at Sigma File Manager.

How do I install and set up Sigma File Manager on Windows or Linux?

Install Sigma File Manager from its official download link, which the project hosts on GitHub rather than on its own site. The product page Sigma File Manager describes it as a free, open-source file manager for Windows and Linux and points to a "Download on Github" button; use that route rather than third-party download sites, and check the page's note that the current build is an "Alpha v2" release before relying on it for critical work.

Windows

  1. Open the official site and follow the GitHub download link.
  2. Pick the Windows build from the releases list (typically an installer or a portable package — the page does not spell out exact formats, so read the release notes).
  3. Run the installer, or unzip the portable version to a folder you control.
  4. Launch the app. On first run, expect to set your preferred theme and layout, since the page lists customizable color schemes and layout options as a feature.

Linux

  1. From the same GitHub releases page, choose the Linux package that matches your distribution (for example a .deb, AppImage or similar — confirm the exact formats in the release assets).
  2. Install with your package manager for a .deb, or make an AppImage executable with chmod +x and run it.
  3. Start the app from your applications menu or a terminal.

Initial setup worth doing

  • Connect cloud storage if you want it: the FAQ says Dropbox, Google Drive and OneDrive accounts can be linked inside the app.
  • Try the dual-pane view for copy/move work between two folders; it is the feature most likely to change how you work day to day.
  • Set search filters (name, type, date modified) as your default habit, since advanced search is a headline feature.
  • Test archive handling with a ZIP or RAR file to confirm compression and extraction work in your environment.

A practical check before committing

Because the project labels itself as rapidly evolving and currently in alpha, install it alongside your system file manager rather than replacing it. A reasonable test: use Sigma for a week on non-critical folders — browsing, searching, previewing files and moving data between panes — and keep your OS explorer for system-level operations. If you want a comparison point, mainstream open-source alternatives exist, such as GitHub-hosted projects like Double Commander or Files, though their fit depends on your platform and workflow.

How can I connect Dropbox, Google Drive, or OneDrive to Sigma File Manager and manage cloud files from the app?

Sigma File Manager's page states that it supports connecting cloud accounts such as Dropbox, Google Drive and OneDrive, so cloud files can be browsed alongside local ones in the same app. The page does not describe the exact connection steps, so treat the following as general guidance rather than a documented procedure for this app.

What the page confirms

  • Cloud storage integration is listed as a supported feature, alongside a dual-pane view, drag and drop, built-in file viewer, archive handling and a customizable interface.
  • The app runs on Windows and Linux.
  • The project is labelled as an alpha-stage release that is evolving quickly.

Practical way to set it up

  1. Install the app from its official source and open it.
  2. Look for a settings, preferences or "cloud"/"accounts" area, or a sidebar entry for connected drives.
  3. Choose the provider (Dropbox, Google Drive or OneDrive) and sign in through the provider's own authorization page in your browser.
  4. Grant access, then return to the app and confirm the account appears as a browsable location.
  5. Test with a small action first—open a folder, preview a file, then copy one file—before relying on it for bulk moves.

What to expect in daily use

  • Dual pane: dragging between a cloud folder and a local folder is the main workflow; expect transfers to depend on your connection speed.
  • Search and viewer: useful for finding and previewing cloud files without downloading them to disk first, though availability depends on how the integration is implemented.
  • Archives: compressing or extracting inside a cloud folder usually means temporary local storage is used.

Decision criteria and caveats

Because this is an alpha release, verify that sign-in actually works with your provider and that file changes sync correctly before making it your main tool. For anything critical, keep the provider's own desktop client or web interface as a fallback. If you want a more established alternative, compare with well-known cross-platform managers such as Double Commander or Rclone for scripted cloud syncing—each trades polish or simplicity for maturity.

How do I use the dual pane view and drag-and-drop to move or copy files between two folders at once?

Use the dual pane view to show two folders side by side, then drag files from one pane to the other to move or copy them between locations. Sigma File Manager lists both features as key capabilities: a dual pane view for browsing two locations at once and drag-and-drop for rearranging, copying, or transferring files between directories Sigma File Manager.

A practical workflow

  1. Open the dual pane view so the source folder sits in one pane and the destination in the other.
  2. Select the files or folders you want to transfer in the source pane.
  3. Drag the selection onto the destination pane and drop it.
  4. Confirm where the files landed, then repeat for the next batch.

The page describes drag-and-drop as working "within the app," so treat cross-pane dragging as the intended pattern rather than copying between the app and your desktop.

Move or copy?

The site doesn't spell out which modifier key produces a copy versus a move. The safe approach is to check the app's own behavior before relying on a drag:

  • Move: the simplest drag-and-drop, matching the page's wording about rearranging and transferring files between directories.
  • Copy: test a single small file first and see whether the original remains in the source pane. If a plain drag moves it, look for a context-menu copy command or a keyboard modifier, then verify the original is still there.

If you're unsure, copy first and delete the source afterward—reversible and low-risk.

When the dual pane view earns its place

It suits reorganizing a downloads folder into project folders, comparing two backup directories, or sorting photos into dated folders. For a single quick move, the two-pane layout adds little; for repeated batch transfers, it removes the back-and-forth of navigating between locations.

Start with one test file to confirm whether your drag copies or moves, then work in batches with both panes open.

What are the known limitations or risks of using the Alpha v2 release, and is it stable enough for daily use?

The site labels Sigma File Manager as an Alpha v2 release, and that label is the main risk signal. Alpha-stage software is typically still changing quickly, so you should expect possible bugs, incomplete features, interface changes between versions, and limited testing on unusual setups. The page itself does not list specific known defects, crash reports, or a stability guarantee, so any particular issue you hit would be new information rather than something documented here.

Who should be cautious

  • Primary work machine: If you manage critical documents, keep the tool as a secondary option rather than your only file manager.
  • Shared or production systems: Alpha software is a poor fit where downtime or data mishandling has real costs.
  • Routine, low-risk browsing: Trying it on a spare machine or a non-critical folder is a reasonable way to evaluate it.

Practical safeguards before daily use

  1. Keep the built-in explorer available as a fallback for anything important.
  2. Back up before bulk operations such as moving, compressing, or extracting archives, since those are the actions where a bug would hurt most.
  3. Test your actual workflow — dual-pane moves, search filters, cloud connections — on copies of files first.
  4. Watch for version changes and re-check behaviour after updates, since fast-moving projects can regress.

Decision criterion

Treat it as stable enough for daily use only after you have run your own common tasks without data loss or crashes over a reasonable period. The advertised features — advanced search, dual-pane view, built-in viewer, archiving, cloud integration, and customization — are what the project aims to deliver; the alpha label means reliability is not yet assured. For a second opinion on mature alternatives, compare with Website Name only if you have confirmed its official domain.

Related questions

More questions →
What is Sigma File Manager?

Sigma File Manager is a free, open-source file manager (explorer) app for Windows and Linux, currently in an Alpha v2 release. It's aimed at users who want a modern, customizable alternative to the default file explorer, with built-in search, dual pane browsing, file previews, and archive handling. You download it from GitHub. If you need a mature, long-stable tool for production or enterprise environments, the alpha status is worth weighing before you switch.

What it does

The app is designed to help you organize, access, and share files through a "sleek and intuitive interface." The site describes it as rapidly evolving, so features and behavior can change between releases.

Key capabilities

Feature What it gives you
Advanced file search Find files or folders and filter results by name, type, date modified, and more
Drag and drop Move, rearrange, copy, or transfer files between directories within the app
Dual pane view Browse and manage two locations side by side
Built-in file viewer Preview images, videos, documents, and more without opening external apps
Archiving and compression Compress and extract formats such as ZIP and RAR
Customizable interface Choose color schemes and layout options
Cloud storage integration Connect accounts such as Dropbox, Google Drive, and OneDrive

Who it fits

  • Windows and Linux users who want one file manager across both systems — the site states it works on both.
  • People who preview files often — the built-in viewer covers images, videos, and documents, so you can check content before opening it.
  • Users who work across two folders at once — dual pane view suits copying or comparing between locations.
  • Anyone who wants a different look — color schemes and layout options are configurable.
  • Users comfortable with early software — the current release is Alpha v2, so expect ongoing change.

It's less suited to anyone who needs a fixed, fully mature tool with a long support track record; the site itself frames the app as "quickly evolving."

How to get it

  1. Go to the Sigma File Manager site (sigma-file-manager.vercel.app).
  2. Use the "Download on Github" link to reach the release page.
  3. Download the build for your system — Windows or Linux.
  4. Install and launch the app.
  5. Optional setup: connect a cloud account (Dropbox, Google Drive, or OneDrive) and adjust color scheme and layout in the interface settings.

To verify it's working: open the app, switch to dual pane view, run a search with a filter such as date modified, and preview a file without launching an external program.

Common sticking points

  • Alpha software: the site labels the current version Alpha v2, so back up important workflows and check release notes before relying on it daily.
  • Platform coverage: only Windows and Linux are listed. The site does not mention macOS support.
  • Cloud connections: integration is advertised for Dropbox, Google Drive, and OneDrive; other services aren't listed.
  • Pricing and account requirements: the app is described as free and open-source, but the site provides no further detail on licensing terms or whether an account is needed — check the GitHub repository for specifics.

The short version

Sigma File Manager is a credible free, open-source explorer replacement for Windows and Linux if you value search filters, dual panes, built-in previews, and a customizable look — and you're comfortable running alpha-stage software sourced from GitHub.

What Are Open-Source UI Element Libraries and How Do They Differ From UI Frameworks?

An open-source UI element library is a collection of individual, ready-made interface pieces—buttons, cards, inputs, toggles, loaders—that you copy into your own project and adapt. A UI framework, by contrast, is a structured system of components, conventions, and often a theming layer that governs how your whole interface is built. The practical difference: an element library gives you a snippet; a framework gives you a way of working. If you need a polished button in ten minutes, reach for the element library. If you're building a 40-screen product with a team, you probably want the framework.

What "open-source UI element library" actually means

The term gets used loosely, so it helps to separate the parts:

  • Open-source: the code is publicly available, and the license tells you what you may do with it—copy, modify, redistribute, or use commercially.
  • UI element: a single, self-contained piece of interface, usually small enough to read in one sitting. A button with hover states, a pricing card, a search field.
  • Library: a browsable, searchable collection of those elements, typically contributed by many different people.

On a site like Uiverse, elements are shared by a community and written in plain CSS or Tailwind. You find one you like, copy the markup and styles, paste them into your project, and adjust colors, spacing, and text to fit. There's no package to install and no build step required—which is exactly the appeal, and also the source of most of the confusion.

Element library vs. UI framework: the core differences

Dimension Open-source UI element library UI framework / design system
Unit of reuse A single snippet you copy A component you import or call
Installation None; paste into your code Package install, config, sometimes a provider
Consistency Depends on you; each element may look different Enforced by shared tokens and APIs
Theming Manual edits per element Central theme/config file
Updates You own the copy; no upstream updates Version bumps bring fixes and changes
Accessibility Varies per contributor; must be checked Usually tested and documented
Best for Prototypes, landing pages, small sites, one-off needs Multi-page apps, teams, long-lived products
Learning curve Low—read the CSS Higher—learn the API and conventions

The table isn't a verdict. It's a map of trade-offs. Element libraries win on speed and freedom; frameworks win on consistency and maintenance.

Licensing and attribution: what to check before you paste

This is where people get into trouble, and it's worth slowing down for.

  1. Find the license. Every element or collection should state one. Common open-source licenses include MIT, Apache-2.0, and BSD. Some projects use copyleft licenses like GPL, which can impose obligations if you redistribute your code.
  2. Understand what the license permits. MIT and Apache-2.0 are permissive: you can typically use the code in commercial and closed-source projects. Copyleft licenses may require you to release derivative source under the same terms.
  3. Check attribution requirements. Permissive licenses usually require you to keep the copyright notice and license text somewhere in your project. That's a real obligation, not a formality.
  4. Look for per-element terms. On community sites, the site's overall terms and the individual contributor's stated wishes may differ. If a contributor asks for credit, honor it.
  5. When in doubt, ask or avoid. If a snippet has no license at all, you don't have clear permission to reuse it. Treat "no license" as "not open source," even if the code is publicly visible.

This article is general information, not legal advice. For commercial products with real exposure, have someone qualified review the licenses you're relying on.

How to use a community element in your project: a practical workflow

Here's a repeatable process that avoids most of the usual mess.

1. Start from a real need, not a browsing session

Decide what you need first—"a compact primary button with a loading state"—then search. Browsing aimlessly produces a pile of pretty snippets that don't fit together.

2. Copy the smallest version that works

Take the markup and the styles. Strip anything you don't need: demo wrappers, extra animations, decorative layers. Less code means fewer surprises.

3. Convert it to your conventions

If your project uses design tokens or CSS variables, replace hard-coded values:

/* Before: hard-coded */
.button { background: #4f46e5; border-radius: 8px; }

/* After: token-based */
.button { background: var(--color-primary); border-radius: var(--radius-md); }

This one step is what keeps a copied element from looking like a foreign object in your UI.

4. Check accessibility before you ship

Community elements vary widely here. Verify at minimum:

  • Keyboard focus is visible and the element is reachable by Tab.
  • Color contrast meets WCAG AA (4.5:1 for normal text).
  • Interactive elements use semantic HTML (<button>, not a clickable <div>).
  • Form inputs have associated labels.
  • Motion respects prefers-reduced-motion.

5. Test in context

Paste it into a real page with real content. Long labels, small screens, and dark mode break more copied elements than anything else.

6. Note where it came from

Keep a short comment or an internal credits file: source, license, date. Future you—and your legal reviewer—will be grateful.

Where element libraries genuinely shine

  • Prototypes and demos: you need something clickable today, not a design system.
  • Landing pages and marketing sites: a handful of distinctive elements, each custom.
  • Filling gaps: your framework lacks one specific component, and you don't want to build it from scratch.
  • Learning: reading well-made CSS is one of the fastest ways to improve.
  • Small projects: a personal site doesn't need a theming architecture.

Where they fall short

  • Consistency at scale: ten elements from ten contributors rarely look like one product.
  • Maintenance: you own every copy. When your design changes, you edit each one.
  • Accessibility debt: you inherit whatever the contributor did or didn't do.
  • No upstream fixes: a bug fixed in the original won't reach your copy.
  • Integration friction: different naming conventions, different units, different assumptions about resets.

When to choose which

Choose an element library when the scope is small, the timeline is short, or you need a few distinctive pieces rather than a whole system.

Choose a framework or design system when multiple people build multiple screens over months, when consistency is a product requirement, or when accessibility and theming need to be guaranteed rather than checked.

A hybrid works well for many teams: adopt a framework for the structural components—forms, navigation, layout—and borrow individual elements for the places where you want personality. Just route every borrowed element through the same token and accessibility checks, so it lands as part of your system rather than beside it.

The short version: open-source UI element libraries are a fast, flexible way to get good-looking interface pieces into a project. They are not a substitute for a design system, and the license and accessibility details are the part worth reading carefully.

Can You Customize the Appearance of Sigma File Manager?

Yes. Sigma File Manager lets you change how the app looks and how its layout is arranged. According to the project's site, the interface is customizable: you can choose from different color schemes and different layout options to match your preferences. This applies to the app on both Windows and Linux, the two platforms it is built for.

What "customizable" covers

The site describes customization in two areas:

  • Color schemes — change the app's color appearance rather than being locked to a single theme.
  • Layout options — adjust how the interface is arranged, so the app can be set up to suit how you work.

The site does not publish a list of specific themes, exact layout presets, or step-by-step settings paths. Treat "different color schemes and layout options" as the confirmed scope, and check the app itself for the current choices.

Why layout options matter here

Sigma File Manager includes a dual pane view for browsing two locations at once, plus drag-and-drop file movement, advanced search with filters (name, type, date modified), a built-in file viewer, and archive compression/extraction for formats such as ZIP and RAR. Layout customization is what lets you arrange these around your own workflow — for example, keeping a dual pane setup visible if you move files between folders often, or a simpler single view if you mostly browse.

How to check and change it

  1. Install or open Sigma File Manager on Windows or Linux (the site points to GitHub for downloads).
  2. Open the app's settings or preferences area.
  3. Look for appearance, theme, or layout controls and apply a color scheme or layout option.
  4. Confirm the change took effect in the main window; if a layout change doesn't appear, restart the app.

The site does not document exact menu names or setting locations, so the labels may differ from the wording above.

Practical notes

  • The project describes itself as rapidly evolving and currently offers an Alpha v2 release. Customization options may change between versions, so verify against the version you install.
  • Customization is separate from cloud integration. The app supports connecting accounts such as Dropbox, Google Drive, and OneDrive, but the site presents that as a feature, not as an appearance setting.
  • If appearance options are limited in your build, check the project's GitHub page for release notes before assuming the feature is missing.
Which operating systems does Sigma File Manager support?

Sigma File Manager runs on Windows and Linux. The project describes itself as a file manager (explorer) app "designed for Windows and Linux," and its FAQ confirms compatibility with both operating systems. No other platforms—such as macOS, iOS, or Android—are mentioned on the site, so you should assume Windows and Linux are the only supported targets unless the project states otherwise in a future release.

What the site confirms

Question Answer from the site
Windows support Yes
Linux support Yes
macOS / other platforms Not mentioned
Mobile platforms Not mentioned

The FAQ entry is direct: "Is Sigma File Manager compatible with both Windows and Linux? Yes, Sigma File Manager is designed to work seamlessly on both Windows and Linux operating systems."

What this means in practice

  • If you use Windows or Linux, the app is intended for your system, and you can proceed to download it from the project's GitHub page (the site's "Download on Github" link).
  • If you use macOS or a mobile device, the site gives no indication of support. Don't plan on it working there based on the current information.
  • If you manage a mixed environment, Windows and Linux machines are both covered, which makes the app a candidate for a single cross-platform file management tool across those two systems.

A caveat worth knowing before you install

The site's banner announces an Alpha v2 release. Alpha-stage software can change quickly and may have rough edges, so if you depend on a file manager for critical work, test it on a non-essential machine or alongside your current file manager first. The site also notes the app is "rapidly evolving," which fits an alpha release cadence.

How to check your own system

  1. Confirm your OS is Windows or Linux (check Settings → System → About on Windows, or uname -a in a terminal on Linux).
  2. Go to the project site and use the "Download on Github" link to reach the release page.
  3. Pick the build that matches your platform and install it.
  4. Verify it launches and can browse your drives; if it fails, the alpha status is the most likely explanation, and checking the GitHub issues page is the next step.

If your OS isn't Windows or Linux, the practical answer is to look for an alternative file manager rather than wait on unannounced support.

Does Sigma File Manager Integrate With Cloud Storage Services?

Yes. Sigma File Manager supports cloud storage integration, and the site names Dropbox, Google Drive, and OneDrive as examples you can connect to the app. Once connected, you can manage those cloud files from inside Sigma File Manager rather than switching between separate web apps or sync clients. This applies to the Windows and Linux versions of the app.

What the integration covers

The site's feature list and FAQ describe cloud storage as one of the app's capabilities, alongside local file management. The relevant points:

  • Supported services: Dropbox, Google Drive, and OneDrive are the examples given. The site does not publish a full compatibility list, so treat other providers as unconfirmed until you check the app itself.
  • Platforms: Windows and Linux, per the FAQ.
  • Cost and licensing: The app is described as free and open-source. The site does not state any paid tier or account requirement for cloud connections, so don't assume either way — verify in the app.

How cloud integration fits with the rest of the app

Cloud access is one part of a broader file-management feature set. Knowing the other features helps you judge whether the integration will actually replace your current workflow:

Feature What it does Why it matters for cloud files
Advanced file search Find files by name, type, date modified, and more Useful when cloud folders grow large and you can't remember paths
Dual pane view Browse two locations side by side Handy for moving files between a local folder and a cloud account
Drag and drop Move, copy, or transfer files within the app Simplifies uploads and downloads between panes
Built-in file viewer Preview images, videos, documents without external apps Lets you check cloud files before downloading them
Archiving and compression Compress and extract ZIP, RAR, and other formats Convenient for packaging files pulled from cloud storage
Customizable interface Color schemes and layout options Cosmetic; no effect on cloud behavior

What to check before relying on it

The site presents cloud integration as a headline feature but gives no setup steps, no sync behavior details, and no limits. Before you commit:

  1. Confirm your provider. If you use something other than Dropbox, Google Drive, or OneDrive, test whether it appears in the app's connection options.
  2. Check how files are accessed. The site doesn't say whether connected accounts stream on demand or sync locally. This affects storage use and offline access.
  3. Note the release stage. The site announces an "Alpha v2" release. Alpha software can change behavior between versions, so keep a backup of anything critical.
  4. Download from the official source. The site links to GitHub for downloads; use that link rather than third-party mirrors.

If your main need is browsing and moving files across local and cloud locations in one window, the feature set lines up with that task. If you need guaranteed support for a specific provider or enterprise account type, verify it directly in the app before switching your workflow over.

Website Overview

An established domain and managed infrastructure suggest continuity of operations and may support dependable delivery, although neither guarantees service quality.

Domain and Registration

Registered in 2020, this domain has about 6 years of history. That suggests continuity, although ownership and purpose may have changed. Transfer-protection status is present, helping reduce the risk of unauthorized domain transfers. The registrar is Tucows Domains Inc, a widely used domain service provider. The domain uses the common .app extension, which is not an independent safety signal.

DNS and Email

Nameservers are provided by vercel-dns-3.com, indicating managed DNS hosting. CAA records restrict which certificate authorities are authorized to issue certificates. No CNAME was found; the observed records resolve directly to addresses. No MX record was found. A conventional explicit inbound-mail route is not configured. TXT records include verification markers for Google. Such markers may also remain after a service stops being used.

TLS and Certificates

The certificate uses an RSA 2048-bit public key, offering broad client compatibility. The server supplied a complete certificate chain. No organization name is present in the certificate; the available fields are consistent with domain validation. The certificate was issued within the Google Trust Services cloud or CDN ecosystem. The certificate's total validity is about 89 days, consistent with a short renewal cycle.

HTTP and Browser Security

CORS permits any origin to read this response. This is common for public resources; sensitive responses need narrower handling. No X-Powered-By header was found, reducing one common source of backend fingerprinting information. All six checked browser-security headers are present. Their effectiveness still depends on the policy values and application behavior. No obvious internal addresses or debug information were found in the headers. The Server header contains the custom value Vercel.

Technology Stack Analysis

The public page identifies Next.js, Vercel without precise versions, leaving fewer clues for version-specific scanning.

Search and Social Sharing

The canonical URL points to another host: https://sfm.sigma-hub.com/. Search engines may consolidate indexing signals there. Twitter Card metadata is configured. The title has 18 characters, within a common display range. A meta description is present, with 96 characters. The observed directives allow indexing and link following.

Hosting and Email

DNSvercel-dns-3.com
HostingVercel
EmailUnknown
Approximate IP geolocation (inferred; a CDN or proxy may differ from the origin server) United States flagUnited States Inferred 216.198.79.131

Registration details

RDAP / WHOIS

RegistrarTucows Domains Inc
Registered2020-01-28
Expires2036-01-28
Domain statusclient transfer prohibited、client update prohibited
Nameserversns1.vercel-dns-3.com、ns2.vercel-dns-3.com、ns3.vercel-dns-3.com、ns4.vercel-dns-3.com
DNSSECunsigned

DNS records

DNS

TypeNameValueTTLPriority
Asigma-file-manager.vercel.app216.198.79.131300—
Asigma-file-manager.vercel.app64.29.17.131300—
NSvercel.appns1.vercel-dns-3.com86400—
NSvercel.appns2.vercel-dns-3.com86400—
NSvercel.appns3.vercel-dns-3.com86400—
NSvercel.appns4.vercel-dns-3.com86400—
TXTvercel.appgoogle-site-verification=ye33zD88WkvAKX2-F2WH7Fi-QkAzvvWaPJQneD6Vt803600—
TXTvercel.appv=spf1 -all3600—
CAAvercel.app0 issue "letsencrypt.org"3600—
CAAvercel.app0 issue "pki.goog"3600—
DMARC_dmarc.vercel.appv=DMARC1; p=reject; sp=reject; adkim=s; aspf=s;3600—

TLS and certificates

TLS / SSL

AssessmentNormal configuration
Supported protocolsTLSv1.2、TLSv1.3
Negotiated protocolTLSv1.3
Certificate subject*.vercel.app
IssuerGoogle Trust Services
Valid until2026-11-27T19:48 · Remaining when checked: 37 days
Verification detailsCertificate trust: Passed · Hostname match: Passed

HTTP response headers

HTTP

HeaderValue
content-typetext/html; charset=utf-8
cache-controlpublic, max-age=0, must-revalidate
serverVercel
strict-transport-securitymax-age=31536000; includeSubDomains
content-security-policydefault-src 'self'; script-src 'self' 'unsafe-eval' 'unsafe-inline' *.vercel-analytics.com *.vercel-scripts.com *.cloudflareinsights.com; style-src 'self' 'unsafe-inline'; img-src * blob: data:; media-src *.s3.amazonaws.com; connect-src *; font-src 'self';
x-frame-optionsDENY
x-content-type-optionsnosniff
referrer-policystrict-origin-when-cross-origin
permissions-policycamera=(), microphone=(), geolocation=()
access-control-allow-origin*

Identified technologies

Next.jsVercel

Pages, Search and Sharing

Meta descriptionA free, open-source, quickly evolving, modern file manager (explorer) app for Windows and Linux.
Canonical URLhttps://sfm.sigma-hub.com/
LanguageEnglish (default)
Twitter Cardsummary_large_image
All bots 1 allowed · 0 disallowed
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