Format and prettify JSON with 2 spaces, 4 spaces, or tabs. Sort keys alphabetically for readable diffs. Browser-based, no upload required.
Privacy: Conversion runs locally in your browser. Your source file is not uploaded to JAD Apps servers.
Format minified or messy JSON with proper indentation in your browser. Pick 2-space, 4-space, or tab indent, optionally sort keys alphabetically for clean diffs, and copy or download the result. Useful when an API response arrives unformatted, when you're inspecting webhook payloads, or when you need a deterministic byte order before committing fixtures.
Free is enough for most one-off jobs. Pro raises the file and batch caps; Pro + Media unlocks GB-scale streaming and unlimited duration.
Larger files supported on Developer (5 GB CSV) and Enterprise (unlimited). All processing happens in your browser — files never reach a server.
Drop a JSON file or paste text
Drag a .json file onto the dropzone or paste text. Parsing runs locally — nothing is uploaded.
Choose indent and sort options
Pick 2-space or 4-space indent. Toggle 'Sort keys alphabetically' if you want a deterministic order.
Copy or download
The pretty-printed output appears below. Copy to clipboard or download as `.pretty.json`.
No. JSON object key order is technically unspecified, so reordering keys is semantically identical for any compliant parser.
2 spaces is the most common style for JSON (Prettier, npm, GitHub) and produces smaller diffs. 4 spaces is more readable for very deep documents.
Yes — Pro accounts handle files up to 100 MB. The tool streams parse via the native JSON.parse engine.
Privacy
Conversion runs locally in your browser. Your source file is not uploaded to JAD Apps servers.
Remove all whitespace from JSON for production payloads and API responses. Shows compression savings. Browser-based, no upload required.
Validate JSON syntax in real time. See exact line and column of errors, common mistake hints, and structure summary. Browser-based, no upload.
Automatically fix common broken JSON: missing quotes on keys, trailing commas, single quotes, and unescaped characters. Browser-based, no upload.