JSON Formatter & Validator
Format, beautify, minify, and validate JSON data. Paste your JSON to clean it up, compress it, or check for syntax errors.
Professional JSON Formatter, Validator & Minifier
In the world of modern software development, JSON is the universal language of data. CleanTextLab's JSON Formatter is designed to make that language readable, valid, and efficient. Whether you're debugging a complex API response, preparing a configuration file, or minifying a payload for production, our tool provides a robust environment for JSON manipulation. It combines a high-performance formatting engine with real-time linting, allowing you to catch syntax errors like trailing commas or missing quotes instantly. By providing instant beautification with customizable indentation, we turn 'wall of text' data into actionable, visual structures.
How it Works
- CleanTextLab's JSON Formatter makes messy JSON readable with one click. Paste your JSON and instantly get clean, indented formatting or compact minification for production—all processed privately in your browser. The tool validates your JSON as you paste it, catching syntax errors like missing quotes or trailing commas and showing you exactly where the problem is with strict validation that matches production behavior. For valid JSON, choose 2-space or 4-space indentation with color-coded syntax highlighting that makes keys, strings, numbers, and booleans easy to distinguish. Minification removes all whitespace to create compact payloads perfect for API responses and mobile apps. Unlike cloud-based formatters, your data never leaves your browser—critical for API keys, config files, and sensitive data. Whether you're debugging API responses, organizing package.json files, or preparing configs for deployment, CleanTextLab's JSON Formatter delivers fast, private, professional-grade JSON processing.
Key Features
Common Use Cases
Frequently Asked Questions
Everything you need to know about using this tool effectively and securely.
Q.What happens if my JSON is invalid?
The tool will display a clear error message and highlight the line or character where the parsing failed, helping you fix missing braces or invalid characters.
Q.Can I format JSON with trailing commas?
Standard JSON does not support trailing commas. Our formatter stickily follows the RFC 8259 standard to ensure your output is compatible with all systems.
Q.Is there a size limit for the JSON file?
While it depends on your browser's memory, our tool can comfortably handle payloads up to 10-20MB. For larger datasets, we recommend the 'Pro' desktop utilities.
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