JSON Validator
Validate JSON syntax with detailed error pointers, character positions, and RFC 8259 compliance.
Your files are processed in your browser and are not uploaded to our server.
How to Use JSON Validator
1
Paste JSON
Paste the JSON data you want to test.
2
Validate
Click Validate JSON to run syntax inspection.
3
Inspect Errors
Receive instant confirmation or exact line/character error pointers.
Key Features
RFC 8259 compliant parsing
Precise error messages highlighting line and position
Valid JSON confirmation badge
Frequently Asked Questions
Everything you need to know about this tool and data privacy.
Common causes include trailing commas, single quotes instead of double quotes, and unescaped characters.
Related Tools
More tools in the same category you might find useful
developer
JSON FormatterPopular
Prettify, format, indent, and minify JSON data with instant syntax error detection.
Browser OnlyOpen Tool
developer
Base64 EncoderPopular
Encode plain text or binary files into Base64 format with UTF-8 support.
Browser OnlyOpen Tool
developer
Base64 DecoderPopular
Decode Base64 encoded strings back to plain text or preview and download files.
Browser OnlyOpen Tool