JSON Formatter / Minify / Validator

JSON Formatter turns any JSON into a readable, indented form, compresses it into a single compact line, or checks it for syntax errors. Everything runs in your browser — nothing you paste is sent anywhere.

How to use it

• Format: paste JSON into the input — a 2-space indented result appears immediately.
• Minify: switch to Minify mode to get compact JSON with no whitespace, ready to embed in code or send over the network.
• Validate: if the JSON is invalid, the tool points to the exact line and character where the syntax error occurs.

Common uses

• Reading an API response that arrived as one long unbroken line.
• Checking configuration files (package.json, tsconfig.json, etc.) before a commit.
• Minifying JSON before pasting it into an environment variable or a one-line config.

Things to keep in mind

Formatting never changes data types or key order — only the whitespace and line breaks around values.

Valid JSON doesn't allow trailing commas, comments, or single quotes — if your input has those, run it through JSON Repair first.