JSON Validator & Linter
Validate JSON syntax against official RFC specs and find exact line and column numbers of errors.
100% Local Processing: All calculations and conversions run entirely inside your browser. No private data is ever uploaded or recorded.
How to Use JSON Validator & Linter
1
Enter Your Input
Paste, upload, or type your input directly into the editor or controls above.
2
Instant Processing
Computed 100% locally in your browser with fast execution and complete privacy guarantee.
3
Copy or Download
Quickly copy the processed output to your clipboard or download files with one click.
Technical Specifications & Standards
Architecture Client-Side Web Crypto / V8
Data Privacy 100% In-Browser (Zero Transfer)
Compliance W3C / RFC Standards
Availability Free Forever (Client-Side)
Frequently Asked Questions
How does it pinpoint syntax errors?
It parses JSON tokens and reports line and column offsets on failure.