Feather to CSV converter
To convert Feather to CSV, drop your Feather file in the box below. It converts straight away; press Download to save the CSV. It all happens in your browser, so your file stays on your device.
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Converted on this device, never uploaded
What changes
| Feather to CSV | What happens |
|---|---|
| Feather | Version 2, which is an Arrow IPC file |
| Compression read | LZ4 frame and Zstandard, the two Feather uses |
| Categoricals | Written as their values |
| Dates and times | ISO 8601: 2026-05-04 and 2026-05-04T08:00:00.000Z |
| Formulas | Cells that start with = + - or @ get a ' in front, so a spreadsheet shows them instead of running them |
How to convert Feather to CSV
- Add your Feather. Drop the file in the box, or click to choose it. It becomes CSV straight away.
- Check the result. Look at the preview. The delimiter and value types are set for you; change them if needed.
- Download. Press Download to save the CSV.
Why CSV
Open a Feather file saved by pandas (to_feather) or R’s arrow package in Excel or any spreadsheet.
Questions
Files from before 2020 may be Feather version 1, an older layout that is not read. Saving again with a current pandas or arrow package writes version 2.
No. It is read and converted in your browser, so the data stays on your device.
No. The conversion happens right in your browser, so your file stays on your device. There is no account to make, either.