JSON Formatter & Validator

Format, validate and minify JSON. Clear error messages with line positions. Runs fully in your browser — safe for sensitive data.

Runs in your browser Nothing uploaded Free, no signup

Everything stays in this browser

Made something with AI? Share it as a private link.

Drop in the HTML from Claude, ChatGPT or any editor and get a link your client can open anywhere — with a password, view tracking, comments and approval.