JSON Validator
Paste or upload. Get precise, helpful feedback.
🌙 Dark
Your JSON
Validate
Format
Minify
Insert sample
Clear
Drop a .json file here
or click to choose a file
…or paste JSON below
JSON input
Tip: Works offline after first load. No data leaves your browser.
Validation Results
Idle
Paste or upload to begin.
Error details
Where it failed
Possible quick fixes
Looks valid ✅
Copy formatted
Copy minified
Built with vanilla JavaScript • Dark mode by default • Fully responsive