JSON Formatter
Pretty print, validate, and minify any JSON in one tool.
What does this JSON formatter do?
It takes any JSON string and pretty prints it with proper indentation, minifies it down to a single line, or validates it for syntax issues. Useful for API responses, configuration files, schema markup, and ad hoc debugging when something looks off.
Why pretty print JSON?
Long JSON on a single line is unreadable. Pretty printing adds clean indentation so you can spot missing commas, mismatched brackets, and unexpected null values in seconds. It also makes pull request diffs much easier to review.
How do you use the validator?
- Paste the JSON you want to check.
- Click Validate only.
- Read the status message. Green means valid, red means there is a syntax issue with the position included.
When should you minify JSON?
Minify when you ship JSON over the network, embed it inside HTML, or store it in a database column. The savings are small per record but add up over millions of API responses. Pretty print only when a human is going to read the file.
Got more questions?
Why does my JSON keep failing validation?
Can I format JSON5 here?
Is my data sent to the server?
Does this fix broken JSON automatically?
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