UtilLayer
A free collection of 53 small but handy tools developers reach for constantly — formatting JSON, decoding a token, converting an image — all running in the browser with no account and no data leaving your screen.
🔗 Visit UtilLayer
Description
Every developer keeps a mental list of tiny tasks that come up constantly: format some messy JSON, decode a JWT to see what's inside it, convert a cURL command to Python, generate a UUID. Usually that means bouncing between five different single-purpose websites, some of which ask you to sign up or quietly log what you paste in. UtilLayer puts 53 of these small utilities in one place, running entirely in your browser.
UtilLayer is a free collection of browser-based developer utilities including JSON/YAML/SQL formatters, a cURL-to-code converter, a JSON-to-TypeScript interface generator, an SVG optimizer and PNG converter, regex generators, JWT decoders, UUID generators and more. None of the tools require sign-up, and the site states it doesn't retain user data since processing happens client-side in the browser rather than on a server. It's positioned as a fast, no-friction reference toolkit for day-to-day development tasks rather than a single deep specialized tool.
💬 Our review
The short version: it's a free, no-signup grab-bag of the small utilities every developer ends up needing sooner or later — worth bookmarking specifically because there's no account wall and no reason to think twice about pasting a snippet of code into it.
This kind of "utility belt" site competes less with any single dedicated tool and more with the habit of searching "json formatter online" every time you need one — UtilLayer's value is consolidation and trust (no login, client-side processing) rather than any one utility being uniquely powerful. Desktop alternatives like DevToys offer a similar bundle of utilities but require installing an app, whereas UtilLayer's browser-based approach means zero setup, at the tradeoff of needing internet access and trusting a third-party site's client-side code even briefly. For genuinely sensitive data (production secrets, real customer PII), a fully offline desktop tool is still the safer default regardless of what any browser tool claims about not storing data, since you can't fully verify that from the outside.
💰 Pricing
📊 Global score
🤖 AI-enriched data
100% gratuit, aucune inscription requise
Pros
53 utilitaires réunis en un seul endroit
Aucune inscription ni compte requis
Traitement côté navigateur, aucune donnée envoyée à un serveur
Zéro installation, accessible immédiatement
Cons
Alternative desktop (DevToys) fonctionne aussi hors-ligne
Pas idéal pour coller des secrets vraiment sensibles malgré les garanties annoncées
Aucun utilitaire n'est "le meilleur de sa catégorie" pris isolément