JSON Formatter · Beautifier · Validator

JSON is everywhere — API responses, config files, log lines, webhook payloads — but it's rarely delivered in a shape you can read. A minified one-line blob from a fetch call or a log aggregator is technically valid and completely impenetrable. This formatter takes that wall of text and turns it into clean, indented, color-aware structure so you can actually see what you're looking at.

Beyond pretty-printing, it validates. Paste something that's almost JSON and it tells you exactly where the syntax breaks — a missing comma, an unquoted key, a trailing bracket. It also understands the relaxed dialects you hit in the real world: JSONC (JSON with comments, as used in tsconfig and VS Code settings) and JSON5 (trailing commas, single quotes, unquoted keys), so config files don't get rejected for being human-friendly.

Everything runs locally in your browser. Sort keys alphabetically to diff two responses, minify before pasting into an environment variable, or validate a payload against a JSON Schema — none of it ever leaves your device, which matters when the JSON contains tokens, customer records, or anything you'd rather not paste into a random website.