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UK Tenders

Free CSV to Excel Converter

Free CSV to Excel converter. Upload a CSV and download a clean .xlsx file instantly. Nothing uploaded.

CT
Chandraketu Tripathi
Finance Editor, Kaeltripton
Published 31 Mar 2026
Last reviewed 11 May 2026
✓ Fact-checked
Free CSV to Excel Converter
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Free Spreadsheet Tool

CSV to Excel.
Convert to .xlsx. Free. Instant.

Convert any CSV file to a properly formatted Excel .xlsx file instantly. Nothing uploaded — processed in your browser.

No sign-up100% freeFiles never uploadedWorks on iPhone
CSV to Excel Converter
📊
Drop your file here
or click to browse
CSV files only · Max 20MB · Never uploaded
📊
Processing...0%
Something went wrong. Please try a different file.
Done!
Your file is ready
🔒
100% private
Processed in your browser only
Instant
No waiting, no queue, no server
🗑
Auto deleted
Wiped from memory on download
📱
Works everywhere
iPhone, Android, any browser

Free CSV to Excel Converter

Convert any CSV file into a properly formatted Excel .xlsx file instantly using SheetJS in your browser — no upload, no account required.

Frequently asked questions

Is this free?+
Yes — 100% free, no sign-up.
Are my files safe?+
Processed locally in your browser using SheetJS. Nothing is uploaded.
Does it work on iPhone?+
Yes — all modern browsers.
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Editorial Disclaimer

The content on Kaeltripton.com is for informational and educational purposes only and does not constitute financial, investment, tax, legal or regulatory advice. Kaeltripton.com is not authorised or regulated by the Financial Conduct Authority (FCA) and is not a financial adviser, mortgage broker, insurance intermediary or investment firm. Nothing on this site should be construed as a personal recommendation. Rates, figures and product details are indicative only, subject to change without notice, and should always be verified directly with the relevant provider, HMRC, the FCA register, the Bank of England, Ofgem or other appropriate authority before any financial decision is made. Past performance is not a reliable indicator of future results. If you require regulated financial advice, please consult a qualified adviser authorised by the FCA.

CT
Chandraketu Tripathi
Finance Editor · Kaeltripton.com
Chandraketu (CK) Tripathi, founder and lead editor of Kael Tripton. 22 years in finance and marketing across 23 markets. Writes on UK personal finance, tax, mortgages, insurance, energy, and investing. Sources: HMRC, FCA, Ofgem, BoE, ONS.

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