About this tool
Pretty-print or compact JSON when an API response arrives as one line, or when a config file fails because of a missing comma.
Developers and no-code builders both hit JSON: webhooks, Firebase exports, theme settings. This formatter shows structure with indentation so you can see nested keys instead of squinting at a minified blob.
Never paste live production secrets (private API keys, session tokens) into any online tool if the data is sensitive. Prefer sample payloads. If you must debug a real payload, do it on a machine you control and clear the box when you leave.
Invalid JSON will not format — that is the point. Fix the error (trailing comma, single quotes, comments) then format again. Pair with URL Encoder when you must put JSON inside a query string, which you usually should not.
Quick steps
- Paste the JSON text.
- Format to read, or minify to copy a compact payload.
- Fix any parse error the browser reports.
- Copy the result back to your editor or HTTP client.
Parsing happens in the browser. 1CLIK does not store the JSON you paste.
FAQ
Does it sort keys?
It focuses on valid pretty-print / minify. Do not expect schema validation or key sorting as a database would.
JSON5 or comments?
Standard JSON has no comments. Strip them or convert to a JSON-compatible shape first.
Huge files?
Browser memory is the limit. Split the document or use a local editor for multi-megabyte dumps.