JSON Formatter & Viewer
Format, validate, and explore JSON data with a tree viewer, syntax highlighting, and statistics.
Paste JSON on the left to view it here
Or use the toolbar to paste, upload, or load a sample
Learn More About JSON
Understand JSON syntax, history, and when to use it vs other formats:
Free Online JSON Formatter, Validator & Beautifier
Format, validate, and beautify your JSON data instantly. Our free online JSON formatter parses messy JSON code, highlights syntax errors, and pretty-prints it into a readable, well-structured format. 100% secure and runs locally in your browser.
How It Works
Paste your raw or minified JSON into the editor. Our JSON parser instantly validates the syntax, identifying any errors like missing quotes or trailing commas. If valid, it beautifies the code with proper indentation (pretty print) or minifies it to save space.
Common Use Cases
- Beautifying minified JSON API responses for easier debugging and reading
- Validating JSON configuration files to prevent syntax errors before deployment
- Minifying JSON payloads to reduce file size and improve web performance
- Converting single-line JSON strings into a structured, human-readable tree format
Frequently Asked Questions
A JSON formatter (or JSON beautifier) is a tool that takes unformatted, minified, or messy JSON data and adds proper indentation, line breaks, and spacing to make it easily readable by humans.
Simply paste your JSON into our tool. It automatically acts as a JSON validator, checking for common syntax errors such as missing double quotes, trailing commas, or unclosed brackets, and highlights the exact line of the error.
Yes, completely secure. All JSON parsing, formatting, and validation are performed locally in your web browser using JavaScript. Your data is never uploaded or stored on our servers.
Yes, paste any minified or compressed JSON and the tool will automatically format it with proper indentation, making it easy to read and debug.
Yes, the tool validates your JSON in real time. If there are syntax errors like missing commas, brackets, or quotes, it highlights the exact location of the error.
Yes, the tree view includes a search feature that lets you find specific keys or values within large JSON documents instantly.
The tool handles JSON files up to several megabytes directly in your browser. For extremely large files, performance depends on your device's memory.
Yes, you can click on any node in the tree view to copy its JSON path (e.g., 'data.users[0].name'), making it easy to reference in code.