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YallaConvert

JSON Formatter

Pretty-print or minify JSON, with clear validation errors when it doesn't parse.

Drop files here or browse

Processed on this device. Nothing is uploaded.

Supports JSON, TXT · up to 100 MB

  • No signup
  • No watermark
  • No file leaves your device

How to format JSON, TXT files

  1. Add your file

    Drop JSON, TXT files into the box above or click to browse. Nothing is uploaded — everything stays on your device.

  2. Choose your options

    Adjust the settings that appear once your files are added.

  3. Click “Format”

    The processing runs locally in your browser. How long it takes depends on the file size and your device.

  4. Download the result

    Save the output straight to your device. We never keep a copy, because we never receive one.

Frequently asked questions

Is JSON Formatter free?
Yes. Every browser tool is free, with files up to 100 MB on the free plan. Pro raises the limits to 2 GB.
Are my files uploaded anywhere?
No. JSON Formatter runs entirely in your browser. Your files are processed in memory on your device and are never sent to a server.
Which formats are supported?
It accepts JSON, TXT files and produces JSON.
Do I need an account?
No sign-up is needed. An account only adds extras like saved presets and higher limits.

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JSON Formatter — Pretty-print or minify JSON, with clear validation errors when it doesn't parse. YallaConvert does the work locally: your files are opened and processed by your own browser, so there is no upload, no queue, and no copy of your document on anyone's server.

There's no watermark and no sign-up requirement — open the page, add your files, and download the result.