How do I convert CSV to Excel (XLSX)?

Upload your CSV file above, click Convert, and download the Excel (XLSX) result instantly. No account or software needed.

Is converting CSV to Excel (XLSX) free?

Yes. It is free and unlimited for files up to 5 MB, with no account required. Larger files get 3 free conversions per day; beyond that, credit packs start at $3 and credits never expire.

Are my files stored or shared?

No. Files are processed in server memory and deleted immediately after conversion. File contents are never written to disk or retained.

Do I need to install anything?

No software installation needed. OmniConvert runs in the browser — just upload, convert, and download.

OmniConvert

Convert CSV to Excel

Free

Convert a CSV file to an Excel (.xlsx) spreadsheet

Drop a file or click to browse

Accepted: .csv

or paste below

Free and unlimited for files up to 5 MB. No account needed.

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About this conversion

Convert a CSV file to an Excel (.xlsx) spreadsheet. This converter processes your CSV file server-side and returns a Excel (XLSX) file instantly — no account, no software installation, and no file storage. Files are deleted from our servers immediately after conversion.

How to convert CSV to Excel (XLSX)

1. Upload — drag your CSV file onto the converter above, or click to browse.
2. Convert — press Convert. Processing happens on secure servers in seconds.
3. Download — your Excel (XLSX) file downloads automatically. No sign-up required.

Convert CSV to Excel (XLSX) from the command line

curl --fail-with-body \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -F "file=@input.csv" \
  -F "conversionId=csv-to-excel" \
  https://www.omniconvert.cloud/api/convert -o output.xlsx

The API needs a token from a credit pack, and each API conversion uses one credit. Converting on this page stays free. API documentation

Frequently Asked Questions

How do I convert CSV to Excel (XLSX)?: Upload your CSV file above, click Convert, and download the Excel (XLSX) result instantly. No account or software needed.
Is converting CSV to Excel (XLSX) free?: Yes. It is free and unlimited for files up to 5 MB, with no account required. Larger files get 3 free conversions per day; beyond that, credit packs start at $3 and credits never expire.
Are my files stored or shared?: No. Files are processed in server memory and deleted immediately after conversion. File contents are never written to disk or retained.
Do I need to install anything?: No software installation needed. OmniConvert runs in the browser — just upload, convert, and download.

No account needed · Credits never expire · Share your token link across devices