File converters
Free browser-based converters for JSON, CSV, XML, YAML and XLSX with no uploads or sign-up
Ahrefs Domain Rating set in type 12 Nov 2026, reset 10 Nov 2026.
Free tools to convert between JSON, CSV, XML, YAML and XLSX formats entirely in your browser, with no data uploads required.
Data Format Converter provides free online tools for converting between common data formats including JSON, CSV, XML, YAML and XLSX. All conversions run entirely in your browser using JavaScript, so your data never leaves your device and is not sent to any server.
The site includes eight converters: JSON to CSV, CSV to JSON, XML to JSON, JSON to XML, YAML to JSON, JSON to YAML, CSV to XLSX, and JSON Compare. Each tool is designed to handle specific data requirements, such as flattening nested objects, detecting delimiters, preserving leading zeros, and managing XML attributes.
The browser-based approach provides privacy protection for sensitive data like customer records and API responses. The site uses Content Security Policy to prevent data transmission and runs no advertising or third-party analytics scripts. It also includes guides on how users can verify that no data is uploaded.
Pricing model: Free
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Ahrefs Domain Rating set in type 12 Nov 2026, reset 10 Nov 2026. Majestic set 10 Nov 2026, reset 10 Nov 2026. Link data typeset by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
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Measured after Data Format Converter went live on Zivaro Launch on 10 November 2026.
Day 2 since launch. Next receipt: day 30, 10 Dec 2026. These are measurements, not proof of cause: many things move these numbers. Figures we have not measured are left out.
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All conversions happen on your device with no server-side processing. The site uses Content Security Policy to block network connections that could send data, runs no ads or third-party analytics, and your data never leaves your browser.
Yes. Open your browser's developer tools, switch to the Network tab, and run a conversion. You will see no request carrying your data. You can also disconnect from the internet after the page loads and confirm that conversions still work.
The site supports JSON, CSV, XML, YAML and XLSX, with eight different converters including JSON to CSV, CSV to JSON, XML to JSON, JSON to XML, YAML to JSON, JSON to YAML, CSV to XLSX, and JSON Compare.
Because processing happens on your device, very large files are limited by your browser's memory. Files over about 1 MB are not shown in the text box but will convert when you press Convert.
No account or sign-up is required. The tools are completely free and work immediately in your browser without any registration.
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Data Format Converter has a free listing. The owner can unlock the full profile with a paid launch for $5:
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