If you searched for DevToys web, the short answer is that DevToys is a desktop app, and its own site lists downloads for Windows, macOS and Linux plus a command-line version, not a web version. For the same everyday tools in a browser tab, use AyeTab, a free web app and Chrome extension whose tools run locally in the page.
Why there is no DevToys web version to open
DevToys describes itself as a desktop app that helps developers with daily tasks. It is free and open source, and it ships as an installer, a portable zip, a Microsoft Store app, a macOS app bundle and a Homebrew cask. The download page covers those, along with the separate DevToys CLI. We found no browser version listed there, so any site that calls itself "DevToys online" is not the official project.
That matters for a practical reason. Developer tools handle tokens, API keys and logs. Before you paste one into an unknown website, it is worth knowing whether the site processes it in the page or sends it to a server.
The browser route: AyeTab
AyeTab was built for this case. It has two forms that share the same tools:
- Web app at app.ayetab.com: open it in any tab, nothing to install.
- Chrome extension: the tools appear on every new tab and in a side panel next to the page you are working on.
Both run every transform in the browser. There is no upload and no account, and the extension keeps working offline once installed.
Tool for tool
Here is how common DevToys tasks map to AyeTab pages:
| Task in DevToys | AyeTab tool |
|---|---|
| JSON formatter | JSON Formatter |
| JWT decoder | JWT Debugger |
| Base64 text and image | Base64 Encode/Decode, Base64 Image |
| Hash and checksum | Hash Generator (MD5, SHA-1, SHA-256, SHA-512) |
| Text comparer | Text Diff |
| JSON and YAML | YAML to JSON |
| Cron parser | Cron Parser |
| Regular expression tester | RegExp Tester |
| Certificate decoder | Certificate Decoder (X.509) |
| UUID generator | UUID Generator, plus a ULID Generator |
A use case: reading usage data from AI coding tools
Usage exports and billing API responses from coding agents often arrive as one long line of JSON, sometimes with a bearer token in a header you copied along with it. In AyeTab you paste the response into the JSON Formatter to read it, drop the token into the JWT Debugger to check its expiry, and run a timestamp through the Unix time tool. Smart paste suggests the right tool when you paste a JWT, JSON, Base64 or URL, and Ctrl+K (Cmd+K on a Mac) jumps between tools.
None of that leaves the browser, which is the point when the data includes account IDs or keys.
When the desktop app is still the better choice
If you want DevToys features that only a native app offers, such as its CLI for scripts and CI, community extensions, or system integration like its compact overlay mode, install DevToys. If you mostly need quick conversions while you work in the browser, AyeTab covers them without an install.
Getting started
Open the AyeTab web app for a one-off task, or add the extension from ayetab.com if you want the tools on every new tab. Both are free.