Private JSON tools, built for real work

jsoncompare.dev is an online toolkit for people who work with structured data. The homepage is a full JSON compare tool: paste two JSON documents, choose your options, and review a clear diff. Around that sit companion tools for the steps that usually come before or after a comparison—formatting, validation, compression, and format conversion.

The promise is simple. These tools should feel fast, stay free, and keep sensitive sample data on the device that already has it. That is why everything centers on local processing, no sign-up, and practical results.

Comparing JSON should not mean installing extra software, uploading sensitive samples to an unknown server, or squinting at a wall of minified text. People keep needing answers to ordinary questions:

• Did this API response actually change, or did only key order change?
• Is this config invalid JSON, or just badly formatted?
• Can I shrink this file before sending it somewhere size-sensitive?
• What does this escaped string look like once it is readable again?
• How do I move a sample between JSON, YAML, and XML without opening another app?

jsoncompare.dev is built around those moments. Each page is a focused tool with enough explanation to stand on its own, and clear paths to the next step when you need it.

A few simple rules shape the site. They keep the tools easy to trust and easy to finish a task with.

You do not need a special setup. If you can open a browser and paste text, you can compare or transform JSON here. These are the situations the tools are especially useful for:

The current toolkit covers the JSON jobs people need most often. Start with compare when you need differences. Use the other pages when you need cleaner input, confirmation that JSON is valid, smaller output, or a different format.

• JSON CompareSide-by-side JSON diff with options for key order, array order, and whitespace.
• JSON FormatterPretty-print, beautify, and tidy messy JSON for reading and editing.
• JSON ValidatorCheck whether JSON is valid and find syntax problems quickly.
• JSON MinifyCompress JSON by removing unnecessary whitespace, with optional key sorting.
• JSON UnescapeTurn escaped JSON strings back into readable text.
• YAML to JSONConvert YAML into JSON for configs, samples, and everyday data work.
• XML to JSONTransform XML into JSON for easier reading and reuse.
• JSON to XMLGenerate XML from JSON with root and list-item controls.

Privacy is not just a footer note. It is part of how the tools work. Your JSON is designed to be processed locally in the browser. That matters when files include customer fields, internal IDs, test secrets, or anything else you would rather not send to a random web form.

For the full policy, including what we do and do not collect, read the Privacy Policy. For acceptable use and service terms, see the Terms of Use.

These pages are sharp browser utilities for everyday tasks: comparing two JSON files, finding differences, formatting JSON, validating JSON, and converting common formats. They are built to save a few minutes and keep your data local while you work.

They are not meant to replace a full code editor, a company-wide data platform, or a formal compliance system. When you need a fast, private answer in the browser, they have done the job.

Questions about the site, privacy, or a specific tool can go to support@jsoncompare.dev. You can also use the Contact page.

Ready to work with data now? Start with the JSON Compare tool, or jump into JSON Formatter or JSON Validator.