JSON Validator
Validate JSON syntax online with detailed error messages and line numbers. Free JSON validator for debugging malformed JSON data.
About JSON Validator
Validate and format JSON data. This tool checks for syntax errors, reports the error location, and can format your JSON with proper indentation. It also shows statistics about your JSON structure.
How to Use JSON Validator
Open JSON Validator
Navigate to JSON Validator in your browser — no installation or sign-up required.
Enter your data
Type, paste, or upload the content you want to process into the input area.
Configure options
Adjust any available settings to customize the output to your needs.
Get your result
The result appears instantly. Copy it to your clipboard or download it as a file.
Frequently Asked Questions
Related Tools
JSON Formatter
Format and beautify JSON data online with customizable indentation. Free JSON formatter with syntax highlighting and tree view mode.
JSON Path Finder
Find JSON paths interactively by clicking on values online. Free JSON path finder that generates JSONPath expressions for any node.
JSON Tree Viewer
Visualize JSON data as an interactive tree structure online. Free JSON tree viewer with expand, collapse, and search capabilities.
JSON Escape/Unescape
Escape or unescape JSON strings online for safe embedding. Free JSON escape tool for handling quotes, backslashes, and special chars.
Credit Card Validator
Validate credit card numbers online using the Luhn algorithm. Free card validator that detects Visa, Mastercard, Amex, and more.
CSV Viewer
View CSV files as formatted tables online with sorting and filtering. Free CSV viewer for previewing spreadsheet data in your browser.