Universal Data Converter (CSV/JSON/XML/YAML): free online, no upload
Convert data between CSV, JSON, XML, YAML and Excel-style tables, with validation and pretty-printing. Great for developers, analysts and anyone moving data between apps.
How to use Universal Data Converter (CSV/JSON/XML/YAML)
- Open the tool: Open Universal Data Converter on this page. It loads in a few seconds and runs inside your browser tab.
- Add your input: Add your files, photos and documents or type the values. Nothing is uploaded to any server.
- Adjust and preview: Change the options and check the live preview until the result is exactly what you need.
- Download or copy: Download the result or copy it. You can repeat it as many times as you like, free.
Key features
- CSV ↔ JSON ↔ XML ↔ YAML
- Validation and error lines
- Pretty-print and minify
- Table preview
- Private and offline
Popular uses
- API development
- Spreadsheet to JSON
- Config file conversion
- Data cleaning
Frequently asked questions
Is my data uploaded?
No. Conversion runs in your browser.
Is Universal Data Converter free?
Yes, 100% free with no limits. Online Free Tools is a free welfare project supported only by ads. Full power is unlocked by inviting friends, never by paying.
Are my files uploaded?
No. Universal Data Converter runs inside your browser, so your data stays on your device.
Does it work on mobile?
Yes. It works in Chrome, Safari, Edge and Firefox on Android, iPhone, Windows and Mac.
Built with open-source technology: mholt/PapaParse.
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No subscriptions. No payments. Ever. Full power is unlocked by inviting friends, never by paying.
Invite & Unlock