The private-data pause
Paste without second-guessing
Format JSON, inspect JWTs, decode payloads, and clean data in the browser so sensitive work does not need a random upload step.
No ads, no tracking, just raw local speed. We handle files as big as your CPU can take—if your system doesn't crash, we won't either. Fast, clean, and free until the end of time.
Built for the moment before you paste
Devutils.lol is designed around the small psychological costs of developer work: privacy doubt, tab-hopping, waiting, sign-ins, and the uneasy feeling that a simple task became a transaction.
The promise
Open a utility, finish the thought, return to your work with less noise.
Decode, compare, format, convert, inspect.
Your working data stays in the browser session.
Copy, download, or keep moving without ceremony.
The private-data pause
Format JSON, inspect JWTs, decode payloads, and clean data in the browser so sensitive work does not need a random upload step.
The tiny task tax
No account wall, no pricing modal, no newsletter detour. The interface stays focused on the one job you came to finish.
The waiting loop
Fast local interactions make the tool feel like part of your editor rhythm instead of another slow tab you have to babysit.
The network dependency
Install it as a PWA and the everyday utilities stay available during travel, outages, or locked-down work environments.
Choose a category below or search for a specific task.
We've organized everything by intent.
Private by default. Useful on purpose.
Built for developers who want useful tools without sending private code, tokens, payloads, or configs to someone else's server.
Stop uploading your sensitive keys and JSON to random servers. Get 100% offline, privacy-first developer utilities right on your machine.
DevUtils.lol - The Ultimate Privacy-First Developer Toolkit
DevUtils is a professional suite of free, zero-latency utilities that run entirely in your browser using WebAssembly. We replace slow, ad-riddled online converters with a secure, offline-capable Progressive Web App (PWA) [1, 3].
We have organized our tools by intent to help you get the job done: