I Got Tired of Jumping Between 10 Different Sites Just to Format JSON — So I Built My Own

Every developer knows the drill. You're deep in a debugging session. You need to quickly decode a Base64 string, or format a minified JSON blob so you can actually read it, or generate a UUID for a test fixture. You open a new tab, search for a tool, land on a site drowning in ads and cookie popups, paste your data in, copy the result, and switch back to your IDE. Two minutes gone. Flow broken. I did this dozens of times a day not only for the same but for many others. And one day I just decided — I'll build one place that has all of it. What I Built The Dev Tools Online is a free, browser-based collection of developer utilities. No login. No ads. No data sent to any server. Some of the tools available: JSON Formatter & Validator — paste minified JSON, get clean indented output instantly Base64 Encoder/Decoder — including image to Base64 conversion UUID Generator & Validator — v4 UUIDs, bulk generation, validation JWT Decoder — inspect token headers and payloads without any server call