DevBox

Free · browser-based

Fast, focused tools for small developer tasks.

DevBox is a growing cluster of developer utilities that run entirely in your browser. Pick a tool below to get started.

AvailableJSONView JSON as a tree, format, beautify, minify and validate it — with every error explained in plain English.Coming soonCSS & frontendPX/REM/EM conversion, clamp, aspect ratio, and contrast utilities.

Start with the JSON formatter — encoding, IDs, and timestamp tools are on the way.