Input Data
Output
JSON Formatter
Format, validate, and minify JSON offline. Your data never leaves your browser.
Format, beautify, validate, and minify your JSON data instantly. Detect parsing syntax errors with exact line and column numbers, and format payloads with clean 2-space or 4-space indentation.
Input your raw API response, stringified JSON, or configuration document into the code editor.
Click Beautify to apply clean indentation or Minify to strip whitespaces. Syntax errors are flagged immediately.
Copy formatted output directly to your clipboard or download as a standardized `.json` file.
Format nested objects and arrays with clean, human-readable 2-space or 4-space indentation.
Strict RFC 8259 parser identifies trailing commas, missing quotes, and invalid characters with line accuracy.
Compress JSON by stripping all redundant whitespace and line feeds to reduce bandwidth usage in API calls.
All formatting executes locally in browser JavaScript. Proprietary customer records and API keys remain strictly on your machine.
Never. Sendly JSON Formatter processes all data locally inside your browser's V8 JavaScript engine. No data is transmitted to or saved on any server.
When invalid JSON is detected, Sendly provides exact error messaging detailing the line number and character offset of the syntax problem.
Yes. Simply click the Minify button to compress the payload down to a single compact line, minimizing payload transfer sizes.
Yes. The editor handles JSON payloads up to several megabytes smoothly without browser memory leaks.