JSON viewer, formatter & minifier
Paste JSON below — formatting and validation happen locally.
Paste messy API JSON, validate instantly, then copy a clean or minified version.
How to use this tool
- Paste JSON into the input area or load a sample.
- Switch between Format, Minify, and Validate to shape the payload.
- Open the Tree tab to explore nested objects and expand or collapse nodes.
- Copy the output or keep editing — nothing leaves your browser tab.
Typical use cases
- Debugging REST responses and webhooks before filing a ticket.
- Shrinking JSON payloads for mobile fixtures or demos.
- Reviewing large config files without installing a desktop editor.
Limits & caveats
- Very large documents may feel slow on low-memory devices.
- Relaxed parsing accepts some non-standard JSON — double-check before production.
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Use this JSON formatter to pretty-print messy API responses, shrink payloads with minify, and explore nested objects in the tree tab. Ideal for debugging REST JSON and configuration files.
Everything executes in your browser; nothing is uploaded to Online Tools.