Validate Pretty Minify

Code validator

Paste JSON, XML, HTML, CSS, JavaScript, or YAML and validate the structure, spot basic syntax issues, then pretty-print or minify the result.

JSON / YAML
Parse checks and readable formatting
Markup
HTML and XML structure validation
Transform
Pretty-print or minify in one click

Paste code

Choose a format, paste your snippet, then validate or transform it.

Processing runs server-side. Maximum input size is 256 KB.

Results

Validation messages and transformed output.

Validate or transform code to see results here.

FAQ

Quick answers to common questions.

Is this a full linter?
No — it focuses on syntax and structure checks. Use your IDE or dedicated linters for deep static analysis.
Does my code leave the browser?
Yes — snippets are posted to our tools API for processing. Do not paste secrets or credentials.

Fix it with step-by-step guides

Found an issue with this tool? These Tips & Tricks walk through the fix on Windows, macOS, and Linux.

Browse full topic libraries:

Windows · Apps & tools macOS · Apps & tools Linux · Apps & tools Windows · Troubleshooting macOS · Troubleshooting Linux · Troubleshooting

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