How to Format JSON (Pretty Print and Validate) Free

A minified JSON response is one unreadable line; a formatted one is a clear, indented tree you can actually work with. Whether you're debugging an API or editing a config, here's how to format JSON free — and validate it at the same time.

Pretty-print JSON in one click

Paste your JSON into the JSON formatter and get clean, indented output with consistent spacing. It runs entirely in your browser — nothing is uploaded — so it's safe for sensitive payloads.

Validate as you format

If your JSON is broken, the JSON validator pinpoints the error position so you can fix it fast. The most common culprits are trailing commas, single quotes instead of double quotes, and unquoted keys.

Minify when you're done

For production or sending over the wire, strip the whitespace back out with the JSON minifier — smaller payloads load faster. Format while developing, minify before shipping.

Turn JSON into other formats

Once it's clean, convert it: JSON to CSV for spreadsheets, JSON to YAML for config, or JSON to TypeScript for types.

Why formatting matters

Readable JSON makes bugs obvious — a missing bracket or misplaced value jumps out when the structure is indented. It's the fastest way to understand an unfamiliar API response.