Free online utility · Gentooly
Format and validate JSON
Paste messy or minified JSON to get readable, indented output and find syntax errors fast.
Use the interactive tool to complete your task. Core utilities are free to use. AI Studio, our separate AI product, is coming soon.
Use JSON Formatter →How to use this tool
- Open the JSON Formatter and paste your JSON.
- Run format and validate.
- Fix any reported error, then copy the formatted result.
Common questions
What does validating JSON check?
It checks that the text is valid JSON syntax, for example matching brackets and quoted keys. It does not check your data against a schema.
How do I make JSON smaller?
Use the JSON Minifier to remove extra whitespace.
Is my JSON uploaded?
The tool is designed to run in your browser. Check the tool interface and privacy notice for the current processing behaviour.