What Is upset.dev and What Does It Offer?

Updated

upset.dev is a developer platform that collects open-source software, hosted services, and experiments for people who build and run things on the web. It is aimed at developers who want small, focused utilities — DNS checks, CDN delivery, favicon APIs, domain tools — rather than a single monolithic product. You can browse everything through its Products and Open Source sections, and most tools are usable directly from the browser.

How the platform is organized

The site describes itself as "a developer platform from build to deploy," and its catalog reflects that span. Two top-level areas matter:

  • Products — tools and services built for developers and the open web, each with its own page.
  • Open Source — projects published on GitHub that anyone can use, contribute to, or learn from.

There is also a Press section and a portfolio-style listing, but the practical value for most visitors is in the first two.

What products are available

The catalog mixes general-purpose developer utilities with tools aimed at specific regional or network scenarios. A representative sample:

Product What it does
Speedflare Global website monitoring and testing from multiple worldwide locations
Statically Free, fast global CDN for Git repositories, npm, and open-source projects
Favicone API for instantly fetching favicons from any domain
BlobCDN Generates customizable SVG blobs from a URL
PureDNS DNS service designed for safer browsing in Indonesia
Fonts Privacy-friendly Google Fonts alternative, EU-compliant and tracking-free
Have I Been MITMed? Checks whether your internet traffic is being intercepted or modified
HTTP Check Checks whether a site supports HTTP/2 or HTTP/3
thedev.id Free developer subdomain in the form yourname.thedev.id
Onion Domain Generates a custom .onion domain for a Tor hidden service
DNS Profile Generator Creates Apple configuration profiles for DoH and DoT
whoami Shows what the internet knows about you: IP, location, network, browser
edns Shows which DNS resolver your browser actually uses and whether EDNS Client Subnet leaks your network
DNS Leak Test Exposes every DNS server your connection leaks to
Domain Tools WHOIS and DNS record lookups for any domain from one form
Stak Visualizes Kubernetes manifests and Docker Compose files as an interactive topology map

A few entries are clearly regional or satirical — Indiwtf checks whether a site is accessible in Indonesia, Kominfu is a satirical countdown, and there are Indonesian holiday and Javanese calendar APIs. These are part of the collection rather than the core offering.

Who it is for

The platform suits developers who need a quick answer to a narrow question — is my DNS leaking, does this site support HTTP/3, what favicon does this domain use — without signing up for a large service. It also suits people who want a free personal subdomain (thedev.id) or a lightweight CDN for a Git or npm project.

If you need a full application platform with managed databases, CI pipelines, and team permissions, this is not that. The tools here are individual and mostly self-contained.

How to start using it

  1. Open upset.dev and go to Products to see the full list.
  2. Pick the tool that matches your task — for example, DNS Leak Test if you want to verify a VPN, or HTTP Check if you are auditing a site's protocol support.
  3. Use it directly in the browser where the tool is web-based; API-style products like Favicone are called from your own code.
  4. Check the Open Source section for the GitHub repositories if you want to read the source, self-host, or contribute.

What to keep in mind

The site lists no pricing details in the material available, so do not assume every service is free or that none require an account — verify on the individual product page before depending on it. Some tools are explicitly described as free (Statically, thedev.id, PureDNS, the holiday API), while others carry no stated terms. Regional tools may behave differently depending on where you are connecting from.