1-Byte Developer Tools / JSON

JSON Formatter

Validate, pretty-print, sort keys and download JSON with a single click. Your input stays in your browser.

Runs entirely in your browser · JSON never leaves your device.

Plan: Free Full features included free · key-sorted output and export available. Sign in to your account

Input Raw JSON payload

Paste JSON from your API, log or config and we’ll tidy it up.

0 chars

Tip: if you’re debugging, include the smallest payload that still breaks.

Output Formatted JSON

Errors show up here too, with basic hints when something looks off.

Mode: Full features · pretty-print + deep key sorting

Paste some JSON on the left and press “Run formatter”.

Keys are sorted alphabetically at every level so diffs are stable and reviews are less noisy. Soft limit around 200k characters to keep the browser happy.

Use the “Download .json” button to grab a clean file for bug reports, tickets or sharing with teammates.

Part of the 1-Byte developer toolset.

Coming later: saved snippets per project, one-click sharing with teammates, and bulk JSON clean-up for log files.

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