JSON Formatter

Prettify or minify JSON with validation.

Data & Format Runs locally · Nothing uploaded

What this tool does

Prettify or minify JSON with validation.

Tips

JSON allows neither comments nor trailing commas — that is where most errors come from.
Very large files may briefly block the UI while formatting.

Related tools

View all →

JSON Viewer Browse JSON as a tree and locate errors. JSON ⇄ YAML Convert both ways between JSON and YAML. JSON ⇄ XML Convert both ways between JSON and XML. JSON to CSV Convert JSON arrays to downloadable CSV. XML Formatter Pretty-print and indent XML. YAML Viewer Validate YAML and convert to JSON. JSON Diff Field-by-field comparison of two JSON docs. Text Diff Line-by-line added and removed markers.