Format and validate JSON without uploading it

Messy API responses, minified config files, and copy-pasted payloads are part of everyday developer work. You do not need to paste that JSON into a random upload form to make it readable.

Start with the formatter

Open the JSON Formatter and paste your payload. Use Format for a readable tree of indentation, Minify when you need a compact string, and Validate when you only want to know if the document is legal JSON.

The tree view helps when objects are nested deep: expand only the branches you care about, and search keys or values without scrolling forever.

Compare two versions

When a staging response differs from production, use JSON Compare. Paste left and right documents and scan added, removed, and changed paths. That is faster than eyeballing two pretty-printed blobs in a text editor.

Move between formats

• JSON to YAML when a teammate prefers YAML configs.
• JSON to CSV when you need a spreadsheet of object arrays.

All of these stay in the tab. Large files still belong on your machine — if a payload is huge, prefer formatting in chunks or validating first so you know the structure is sound.

Quick checklist

1. Validate before you minify (minify hides structure mistakes).
2. Keep a raw copy until you are sure the output is what you need.
3. Clear the editor when you are done with tokens or personal data nested inside JSON.