FileToastFormat JSON
Validate JSON and format it with indentation or compact it for download.
How to use Format JSON
- Enter or paste your text.
- Set formatting.
- Run the tool, inspect the result, and download your output.
What this tool does
Validate JSON and format it with indentation or compact it for download. Your original files are unchanged. Keep a copy and check the downloaded result before relying on it.
Questions about Format JSON
Are my files uploaded?
This tool processes files in your browser. File contents are not uploaded to FileToast. Downloads stay wherever you save them.
Can invalid JSON be formatted?
The input must be valid JSON. Syntax errors are reported so you can correct them first.
Can I produce compact JSON?
Yes. Choose compact output to remove formatting whitespace, or select indentation for readability.
What are the file and processing limits?
Text is processed in your browser. Very large passages may be slow on devices with limited memory.