den4b.com

Hasher is den4b's file checksum and verification utility. It generates CRC32, MD5, SHA1, SHA256, SHA512 and many other checksums at the same time, verifies files against expected values, compares files, and exports results to SFV, MD5SUM or SHA1SUM formats. It fits tasks such as confirming a download wasn't corrupted, checking whether two copies of a file are identical, or producing a checksum manifest for a set of files. It is one of several utilities on den4b.com, alongside ReNamer, Shutter, Resizer, Colors and RandPass.

What the tool does

According to the product description on den4b.com, Hasher covers four core jobs:

• Simultaneous multi-algorithm hashing — one pass produces CRC32, MD5, SHA1, SHA256, SHA512 and other checksums, so you don't re-run the tool once per algorithm.
• Verification — check files against expected checksums to confirm integrity.
• File comparison — compare files easily, which is useful when you suspect two files should be identical but aren't.
• Export — save results in SFV, MD5SUM or SHA1SUM formats, the conventional checksum file formats many other tools can read.

When it is the right choice

If your need is only a single quick hash of one file, a built-in OS command may be enough; Hasher's advantage is breadth — many algorithms at once, verification, comparison and standard export formats in one utility.

How to use it in practice

The site provides downloads and documentation for Hasher, so the general workflow is:

1. Get the tool — download Hasher from den4b.com and install or run it.
2. Add the files you want to hash or verify.
3. Select the algorithms you need (for example SHA256 for a download check, or several at once for an archive manifest).
4. Generate the checksums, or load expected checksums to verify against them.
5. Compare or export — use the comparison feature to check two files, or export results as SFV, MD5SUM or SHA1SUM.

The expected result is a list of computed hashes per file, a pass/fail verification result, or an exported checksum file.

Points to watch

• Match the algorithm to the source. If a download page publishes a SHA256 value, verify with SHA256 — an MD5 result won't confirm it.
• Checksums detect corruption and accidental changes, not authenticity by themselves. A hash confirms the file matches the expected value; trust in that expected value comes from where you got it.
• Export formats matter for interoperability. SFV, MD5SUM and SHA1SUM are widely readable, so choose the format your downstream tools expect.
• Pricing and licensing are handled on den4b.com's purchase and licensing pages; check those before relying on the tool in a commercial workflow, since the site lists a Buy section and licensing terms rather than stating free use.

For the broader set of tools on the site, see the overview of what den4b.com offers; Hasher is the one to reach for when the job is checksums, verification and file comparison.

RandPass generates passwords by combining character sets (letters, digits, symbols) or word lists (Diceware, EFF) under custom rules and exclusions, and per the site's release notes for version 2.3, it now produces cryptographically secure passwords by default and rates strength by entropy. It suits anyone who needs policy-compliant passwords for personal use or scripted/automated generation via its command-line support.

What RandPass draws from

RandPass is described on den4b.com as "a secure random password generator" that can create strong passwords using:

• Letters, digits, and symbols — the classic character-based approach, where length and character mix determine the search space.
• Word lists — including Diceware and EFF lists, which build passphrases from randomly chosen words. Word-list generation trades raw character complexity for memorability, since each word adds entropy in proportion to the list size.

The site also notes that the bundled word lists were expanded in version 2.3 with BIP-39 and Orchard Street options, giving more word-list material to draw from.

Rules and exclusions for policy compliance

Beyond picking a source, RandPass lets you apply custom rules and exclusions. In practice, this is what makes the output usable in environments with password policies — for example, a system that forbids ambiguous characters (like l, 1, O, 0) or requires at least one symbol. You define the constraints, and RandPass generates within them rather than producing a password you then have to reject and regenerate.

Automation via command line

RandPass supports command-line operation, so generation can be scripted rather than done by hand. This matters when you need passwords as part of a provisioning or setup workflow — for example, generating a fresh credential each time a test account is created, instead of reusing one. The site presents this as support for "personal or automated use."

What changed in version 2.3

The release notes for RandPass 2.3 (about a month before the site snapshot) list three relevant changes:

The notes call the new default random generator "the standout change," which is the detail worth checking if you relied on older versions or compared outputs across releases.

How to approach it

1. Decide between character-based and word-list generation. Use character-based passwords when a system enforces complexity rules; use Diceware/EFF word lists when you need something a person can actually memorize.
2. Set exclusions to match the target system's policy before generating, so the first output is likely to be accepted.
3. Check the entropy rating shown for the result rather than judging strength by appearance.
4. Use the command line if you need repeatable, scripted generation; otherwise the interactive generator is sufficient.

One caveat: the site snapshot confirms the features above but does not document specific command-line syntax or menu locations, so consult the bundled help/documentation and forum linked from den4b.com for exact usage. Pricing and licensing details are handled on the site's Purchase and Compare Editions pages; the snapshot does not state terms, so check those pages directly if you need them.

ReNamer is den4b's bulk file renaming utility. It applies one or more rename rules to a whole selection of files in a single pass, so you can add prefixes or suffixes, replace text, change case, insert number sequences, and rename folders without touching each file by hand. It is the right tool when you need consistent names across many files and want to save that naming scheme for reuse. Advanced users can go further with regular expressions, Pascal Script, and metadata tags, and the program handles full Unicode names.

The core model: rules applied in sequence

ReNamer works on a rule stack. You add rules to a list, and each rule transforms the current name before the next rule sees it. The preview updates as you build the stack, so you can confirm the result before committing.

Basic rule types described on the site include:

• Prefix — add text to the start of each name.
• Suffix — add text to the end (before the extension).
• Text replacement — swap one string for another.
• Case changes — convert names to upper, lower, title case, and similar.
• Number sequences — insert incrementing numbers for ordered naming.

Because rules chain, order matters. A replacement rule placed before a case-change rule produces a different result than the reverse. Build the stack in the order you want the transformations to happen and check the preview.

Advanced options

Beyond the basic rules, ReNamer supports:

• Regular Expressions — pattern-based matching and replacement for names that follow a predictable structure.
• Pascal Script — write custom rename logic when built-in rules can't express what you need.
• Metadata tags — pull values such as file properties into the new name.
• Folder renaming — apply the same rules to directories, not just files.
• Full Unicode handling — names in non-Latin scripts are preserved and processed correctly.

These options are what separate ReNamer from simple batch renamers: you can encode a naming convention once and apply it reliably.

Saving and reusing rule sets

ReNamer lets you save rule sets, so a naming workflow you build once can be reloaded and run again on a new batch of files. This is the practical payoff for repeatable work — for example, a rule set that stamps a project prefix, a date sequence, and a consistent case on every incoming batch of files.

A worked example

Suppose you have a folder of exported images named inconsistently and want them to follow project_001, project_002, and so on:

1. Add a Replace rule to strip the existing inconsistent text.
2. Add a Prefix rule with project_.
3. Add a Number sequence rule with three digits and a starting value of 1.
4. Check the preview column to confirm every name matches the target pattern.
5. Apply the rename, then save the rule set for the next batch.

If a name doesn't fit the pattern, the preview shows it before anything is changed, which is the main safeguard against a bad bulk rename.

When ReNamer fits — and when it doesn't

ReNamer is suited to renaming many files consistently in one pass, especially when the naming logic is repeatable and you want to save it. It is less useful for one-off renames of a single file, where a manual rename is faster than building a rule stack.

For checksum work rather than renaming, den4b's separate Hasher tool generates and verifies CRC32, MD5, SHA1, SHA256, SHA512 and other checksums simultaneously and can export results in SFV, MD5SUM, or SHA1SUM formats — a different job from ReNamer's. The two are separate products on the same site.

Practical notes

• Always review the preview before applying; the rule stack is powerful enough to produce unintended names if rules are ordered wrongly.
• Test a new rule set on a small copy of the files first.
• Pricing and licensing details are handled on den4b's purchase and licensing pages; check those pages directly for current terms rather than assuming any edition is free.

Shutter is a task scheduler and automation tool from den4b.com that can trigger actions such as shutdown, reboot, running a program, or playing a sound. Triggers include time, CPU usage, battery level, countdown, and custom events, and the tool includes remote web control. It is best suited to unattended maintenance and event-driven automation on a Windows machine that stays powered on.

What Shutter can do

Shutter pairs a trigger (the condition) with an action (what happens when the condition is met). The site lists these options:

The action list is not exhaustive of every possible task, but these are the ones the product page names. If your job is not on the list, check the documentation before assuming it is supported.

How the trigger-action model works

The core mechanism is simple: you define a condition, and Shutter watches for it and fires the action. A practical example is a nightly maintenance window — set a time trigger for 02:00 and an action to run a backup program, then a second rule with a countdown trigger to shut the machine down an hour later. The machine completes the backup unattended and powers off without anyone present.

Event-driven rules work the same way. A CPU usage trigger can start a program only when the processor is busy, and a battery level trigger can shut down or run a script when the battery drops to a set threshold. Custom events let you define your own conditions rather than relying only on the built-in triggers.

Remote web control

Shutter includes remote web control, which lets you manage scheduled actions from a browser rather than only at the machine. The site does not detail the setup, ports, or authentication for this feature, so consult the documentation and forum before exposing it on a network. Treat remote control as a convenience for a trusted local network unless you have confirmed the security configuration.

Where Shutter fits

Shutter is a good choice when you need unattended, condition-based automation on a single machine: scheduled shutdowns, running maintenance scripts at set times, reacting to CPU or battery state, or playing an alert sound when an event fires. It is less suitable if you need cross-machine orchestration or cloud-based scheduling, which the product description does not claim to offer.

Before you rely on it

• Confirm the exact action and trigger you need appears in the documentation, since the product page lists only the main ones.
• Test each rule with a short countdown or a harmless action (such as playing a sound) before scheduling a shutdown or reboot.
• Keep the machine powered and awake for time-based triggers; a sleeping machine will not fire them on schedule.
• Check the purchase and licensing pages for edition differences if you plan to use Shutter beyond a trial.

Shutter is listed alongside ReNamer, Hasher, Resizer, Colors, and RandPass in the den4b.com product lineup, and the site notes the tools have been in development since 2004.

den4b.com is the site of a long-running collection of productivity utilities and browser-based developer tools, in operation since 2004. It offers six desktop applications—ReNamer, Shutter, Hasher, Resizer, Colors, and RandPass—plus a set of web tools for tasks like hashing, encoding, number conversion, password generation, regular expressions, and network checks. If you need to batch-rename files, verify checksums, schedule automated actions, or resize images in bulk, the site is a plausible place to start; if you need a single integrated suite or a hosted service, it is not that.

Desktop applications

The site's main products are Windows-oriented utilities, each focused on one job:

A few details worth knowing before you download:

• RandPass 2.3 (released about a month before the site snapshot) makes generated passwords cryptographically secure by default, adds an entropy-based strength rating, and expands bundled word lists with BIP-39 and Orchard Street options. If you relied on older versions, the default random generator has changed.
• Shutter 4.9 rebuilt the Network Usage monitor, so behavior in that area may differ from earlier releases.
• Hasher is the tool to reach for when you need to confirm a download or transfer wasn't corrupted—it produces and checks the common checksum formats in one pass.

Browser-based tools

Beyond the desktop apps, the site hosts a Tools section with web utilities. The listing includes Browser Info, Date Span, Encoder and Decoder, Hash and Checksum, Number Converter, Password Generator, Ping Host, Port Check, Regular Expressions, Text Case, and Trace Route. These are useful for quick one-off tasks—converting a number base, checking whether a port is reachable, or testing a regex—without installing anything. The site does not state whether these tools process data locally or on a server, so avoid pasting sensitive input into them without confirming that yourself.

Deciding whether it fits your task

• Choose a desktop app if your work is repetitive and file-based: renaming hundreds of files with a consistent pattern (ReNamer), resizing a photo batch to fixed dimensions (Resizer), or verifying a set of checksums (Hasher).
• Choose Shutter if you want actions triggered by system conditions—for example, shutting down after a long encode or running a script when CPU usage drops—rather than by a fixed clock time alone.
• Choose the web tools for occasional, small tasks where installing software isn't worth it.
• Look elsewhere if you need cross-platform coverage, a cloud-synced workflow, or a single unified application; the site presents these as separate utilities.

Where to go on the site

The navigation exposes Products (overview and individual tool pages), Tools (browser-based utilities), Downloads, Documentation, Forum, and Help for each product. Licensing and commercial details sit under Purchase, Compare Editions, Licensing Terms, and Refund Policy. The site shows a "Buy" link and a purchase page, which indicates paid editions exist, but the snapshot does not include prices or state which features are free versus paid—check the Compare Editions page before committing. Each product page also carries a "Downloads" and "More info" link, and several products display award badges, which reflect the vendor's own presentation rather than independent testing.