DATA / PROCESSED LOCALLY

JSON formatter & validator

Beautify, minify or validate JSON while keeping original numbers intact.

{ }

JSON input

0 charactersUTF-8 text

JSON settings

ActionIndentation

Standard JSON only: no comments or trailing commas. Formatting preserves original number spelling, string escapes, key order and duplicate keys. Validation checks syntax, not a schema.

Local processing · up to 1 MB per input

How it works

Paste your content or open a supported local file.
Choose your settings, then preview or process it.
Copy or download the result. Clear your work when finished.

A few useful details

Syntax validation accepts standard JSON. Formatting keeps original number spelling, string escapes, key order and duplicate keys. It does not validate against a schema.

Up to 1 MB of JSON and 200 nesting levels. Output is capped at 8 million characters, with a shortened on-screen preview for large results. File contents are not saved between visits.