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devpack AppsInstall Free Developer Tools on Desktop & Mobile

Every one of the 253 tools is also a free app for Windows, macOS, Linux, ChromeOS, Android and iOS — with its own icon and window. 222 of them run on your device and keep working offline. Pick a tool to install it, or install the whole toolbox.

How to install →

Frequently asked questions

Can I use developer tools offline?
Yes. devpack.app has more than 200 developer tools that run entirely in your browser — JSON, YAML and SQL formatters, regex tester, JWT decoder, image and PDF tools and more. Install any of them as an app and they keep working without an internet connection.
Is there a desktop app for the JSON Formatter, Regex Tester or SQL tools?
Yes. Every tool on this page can be installed as a desktop app on Windows, macOS, Linux and ChromeOS from Chrome, Edge or Safari. Pick the tool above and click Install app — it opens in its own window like a native program.
Are there developer tools apps for Android and iPhone?
Yes. On Android install from Chrome, Edge or Samsung Internet; on iPhone and iPad use Share → Add to Home Screen in Safari. Each tool gets its own home-screen icon and opens full screen.
Do I need an app store or an account?
No. The apps install straight from the website, are free, and need no sign-up. They update themselves the next time you are online.
Which tools need an internet connection?
Tools that check live websites — SEO audit, DNS, SSL, redirect and header checkers — need a connection. Everything marked “Works offline” runs on your device.

How to install →