Validate, prettify, and minify raw JSON data. Everything runs locally in your browser—making it fully safe to format keys, configs, and production payloads without uploading a single byte to external servers.
Paste your raw JSON text below to prettify, validate, or minify it instantly in your browser.
No. FileSwift runs entirely client-side. The JSON parser is executed locally by your browser's V8 engine. None of the text you paste leaves your device or goes through any server.
The formatter will instantly locate the syntax error. A red error panel will display the exact reason and position of the error (such as missing commas, bad quotes, or unclosed brackets) so you can fix it.
Yes. Because the formatting runs directly inside your computer's RAM rather than waiting for a slow network upload queue, it can handle large JSON logs and config files in milliseconds.