Yes, absolutely. All JSON processing happens entirely in your browser. Your data never leaves your device and is not sent to any servers. This ensures complete privacy and security for your sensitive JSON data.
There are no artificial file size limits imposed by our tool. The JSON formatter can handle large files limited only by your browser's memory capacity. Most modern browsers can handle files up to several megabytes without issues.
Yes, once the page is loaded, you can use the tool offline. All processing happens client-side using JavaScript. Consider bookmarking the page or saving it locally for offline use.
Auto Repair can fix: unquoted keys, single quotes, trailing commas, missing commas, undefined values, unbalanced brackets/braces, JavaScript-style comments, and Python print output (None/True/False, dict: prefixes).
The Auto Repair feature can handle some JSON5/JSONC features like comments and unquoted keys, converting them to standard JSON format. However, full JSON5 compatibility is not guaranteed for all edge cases.
This tool is open source and built with standard web technologies. You can view the source code and integrate similar functionality into your own projects. The code uses vanilla JavaScript and CSS.
Common causes include: trailing commas, single quotes instead of double quotes, unquoted keys, missing quotes around string values, or unbalanced brackets. Use the Auto Repair feature to fix most common issues automatically.
After formatting your JSON successfully, click the "Copy to Clipboard" button. You can also manually select all text in the output area and use Ctrl+C (Cmd+C on Mac) to copy.
Format/Validate parses valid JSON and formats it with proper indentation and syntax highlighting. Auto Repair attempts to fix malformed JSON first, then you can format the repaired result.
This tool focuses on JSON syntax validation and formatting. It doesn't validate against specific JSON schemas. For schema validation, you would need additional tools or libraries specific to your use case.
Yes, the tool fully supports deeply nested JSON objects and arrays. There's no limit on nesting depth other than what your browser can handle in terms of memory and processing.
We welcome feedback and bug reports. You can contact us through our support channels or contribute to the project if it's open source. Check the footer for contact information.
The web tool is fully responsive and works great on mobile devices. There's no separate mobile app needed - just use your mobile browser to access the same functionality.
For privacy reasons, the tool doesn't save your JSON data or maintain history. Each session is independent. You can manually save formatted JSON by copying it to your clipboard or saving it as a file.
The tool works in all modern browsers including Chrome, Firefox, Safari, and Edge. It uses standard web technologies and doesn't require any plugins or special extensions.
Syntax highlighting is applied using CSS and JavaScript after successful JSON parsing. Different JSON elements (strings, numbers, booleans, keys) are colored differently to improve readability.