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CSV & Excel Converter

Convert CSV, XLSX, JSON, Markdown, TSV, HTML and SQL both ways.

Free, no uploads, no sign-up. Runs 100% in your browser.

How CSV & Excel Converter works

CSV & Excel Converter runs entirely in your browser. Convert CSV, XLSX, JSON, Markdown, TSV, HTML and SQL both ways. Under the hood it uses PapaParse (a robust CSV parser), SheetJS (a spreadsheet parser/writer for XLSX, XLS and CSV) and js-yaml (a YAML parser and serializer). Your files are read into this tab’s memory, processed on your own CPU, and handed back to you as a download. Nothing is sent to a server.

How to use CSV & Excel Converter

1. Open CSV & Excel Converter and add your source file (or paste content where offered).
2. Adjust page size, quality or layout options in the side panel.
3. Check the live preview.
4. Convert and download the result.

Tips

• Conversions run entirely in your tab, so very large files depend on your device’s memory.
• For best fidelity, start from the original digital file rather than a scan.

CSV & Excel Converter FAQ

Are my files uploaded?

No. This tool runs entirely in your browser tab. Files are read from your disk into memory and the result is generated locally.

Is it free? Are there limits or watermarks?

Free and open source (MIT). There are no file-size caps, daily quotas, accounts or watermarks.

Does it work offline?

Yes, once the page (and any engine it needs) has loaded, it keeps working without a connection thanks to the service worker cache.

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