Format, validate, and minify JSON locally in your browser.
Local developer tool
Beautify nested objects, minify payloads, and validate JSON with selected inputs processed locally in your browser.
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Beautify nested objects, minify payloads, and validate JSON with selected inputs processed locally in your browser.
Selected file contents are processed locally in your browser for supported workflows. This privacy build does not intentionally load ads, analytics, remote fonts, or third-party runtime scripts.
Use the controls on this page, review the output in your browser, then copy or download the result.
Formatted JSON is easier to inspect, debug, review, and share with teammates. Minified JSON is useful when you need compact payloads for APIs, examples, or configuration files.
This tool validates strict JSON. It does not repair invalid JSON or accept JavaScript-style comments, trailing commas, or unquoted keys.
Yes. You can format, validate, minify, copy, and download JSON without signup.
No. Parsing and formatting run locally in your browser.
Yes. JSON.parse and JSON.stringify preserve valid Unicode strings and emojis.
No. It validates strict JSON and shows an error so you can fix the source manually.
Two spaces are common for web projects, four spaces are easier to read, and tabs are useful when your project requires them.
Privacy build: This build removes ads, analytics, remote fonts, runtime CDN scripts, and file-operation telemetry. Selected files are processed in the browser using local JavaScript and browser APIs.
ConvertUnlimited does not provide a server-side upload endpoint for this JSON formatting flow. JSON input and selected files are processed locally in your browser.
ConvertUnlimited is provided as is. Always review formatted JSON before using it in production systems.
Files are processed locally where supported. Review the Trust Center for the processing model and the Privacy Policy for public-site privacy boundaries.