Free Online JSON, CSV, Excel & XML Converters
Convert data instantly — no signup. Powered by the SuperConvert .NET library.
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Why developers choose SuperConvert
SuperConvert is a free online data conversion platform for JSON, CSV, Excel, and XML workflows. Every tool is powered by the same SuperConvert .NET library available on NuGet — trusted for accurate structural conversion, CSV quote handling, and enterprise date utilities.
Developer-first converters
JSON, CSV, Excel, and XML tools with live preview and instant download.
Powered by SuperConvert library
Same engine as the production NuGet package used in .NET applications worldwide.
No signup required
Paste, convert, and download — free for personal and commercial use.
Open source
Transparent conversion logic you can audit, self-host, or extend.
Supported data formats
JSON
API payloads, configs, and NoSQL exports
CSV
Spreadsheets, logs, and tabular imports
Excel (.xls)
Tab-delimited SuperConvert-compatible workbooks
XML
Enterprise feeds and legacy integrations
Frequently asked questions
- What is SuperConvert?
- SuperConvert is a free online suite of data conversion tools for developers. Convert between JSON, CSV, Excel (.xls), and XML, plus utilities for dates, Base64, and ASCII — all powered by the SuperConvert .NET library.
- Which formats are supported?
- Data converters support JSON, CSV, Excel (tab-delimited .xls), and XML. Additional tools cover Gregorian/Hijri dates, Base64 encoding, and ASCII code conversion.
- Do I need an account?
- No. All converters are free and work without registration.
- Can I use SuperConvert in my own .NET app?
- Yes. Install the SuperConvert NuGet package from https://www.nuget.org/packages/SuperConvert/ or browse the source on GitHub. The website uses the same library.