XLSX to CSV converter
Convert XLSX files to CSV with encrypted uploads and automatic deletion. Comma-separated plain-text tabular data.
Drop a XLSX file, or click to browse
Converts to CSV · runs live, right now
How it works
Drop your file
Drag a XLSX file in, or click to browse. No account needed to try it.
We convert it
Encrypted upload, converted to CSV in our sheet pipeline.
Download the result
Grab your CSV file immediately, or find it later in your dashboard.
Why convert XLSX to CSV?
CSV is a plain, uncompressed format — the file will likely be larger than the XLSX original, in exchange for maximum compatibility. The main reason to convert XLSX to CSV is compatibility: CSV opens cleanly in Excel, Google Sheets and most spreadsheet tools, while XLSX doesn't always. If you're sharing a file with someone else, sending it to a tool that expects a specific format, or archiving it for the long term, CSV is usually the safer target.
Format comparison
| XLSX | CSV | |
|---|---|---|
| Extension | .xlsx | .csv |
| MIME type | application/vnd.openxmlformats-officedocument.spreadsheetml.sheet | text/csv |
| Compression | lossless compression | no compression scheme of its own |
| Category | spreadsheet | spreadsheet |
Your file, handled carefully
Uploads are encrypted in transit and at rest, processed in an isolated job, and deleted on the schedule you choose — as fast as immediately. We don't index, search, or share files between accounts. Read the full security model →
Frequently asked questions
Is converting XLSX to CSV free?
Yes — the first 50 conversions every month are free on any plan, including XLSX to CSV.
Will I lose quality converting XLSX to CSV?
CSV is comma-separated plain-text tabular data. We use the highest-quality encoder settings by default so visual or data loss is minimized.
Do you keep a copy of my file?
No, not by default. You choose a retention window at upload — immediate, 1 hour, 24 hours or 7 days — and the file is permanently deleted after that.
What is XLSX?
Microsoft Excel's XML-based spreadsheet format.
What happens if a conversion fails?
You get a clear error message and the job is marked failed in your history — we never silently drop a file. Retry is one click, and nothing is charged against your quota for a failed job.