JSON formatter

Format, minify and validate JSON. Inspect nested data in the tree view.

Input · 1 MiB

Open local JSON / JSONL file

Drag a .json, .jsonl, or .ndjson file here, or choose one locally.

Indentation Sort keys

Tree view / JSON Lines

JSON complete structure report

Tree view

Search key, value, or JSON Pointer

Usage and limits

The tree displays up to 3,000 nodes. Syntax is checked; JSON Schema is not.

Limit: 1 MiB. Duplicate-key and large-integer checks are limited; overwritten duplicate values are not retained.