Free · Browser-Based · Tree View · No Upload

JSON Formatter

Format, validate, minify, sort keys, inspect errors, flatten nested structures, and browse JSON with collapsible tree nodes directly in your browser.

Options Sort object keys Validate before output

Indent

Input JSON

Formatted Output

🌲 Collapsible Tree View

Tree view appears here after validation.

Pretty-print API payloads

Minify JSON before embedding it elsewhere

Sort keys for cleaner diffs

Inspect nested payloads with collapse / expand

What makes this stronger than a basic formatter?

It supports formatting, minifying, key sorting, flattening, and a collapsible tree view for nested JSON inspection.

Can I collapse nested JSON?

Yes. After rendering the tree view, you can collapse or expand individual nodes, or use Collapse All / Expand All for the whole payload.

Does it upload my data?

No. Validation and rendering are done locally in your browser.