Edit CSV files online

Drop a CSV or TSV file in and it opens straight in the online spreadsheet: sort, filter, write formulas, find and replace, add or remove rows and columns, then export as CSV (UTF-8 that Excel opens cleanly) or XLSX. Files saved by Chinese or Western versions of Excel in their legacy encodings (GBK, Windows-1252) are recognised automatically. While you are signed out the file stays in your browser; CSV stores text only, so formulas and formatting keep just their results when saved back to CSV.

Drop an Excel or CSV file

No sign-up · Unlimited · Not uploaded while signed out

How to use it

  1. 1 Drop or choose a CSV or TSV file (or try the sample data)
  2. 2 Sort, filter, edit and add formulas in the online spreadsheet
  3. 3 Use File ▸ Download and pick CSV or XLSX

What it does

  • Sort, filter, find and replace
  • Formulas (500+ functions)
  • Automatic detection of UTF-8, GBK and Windows-1252
  • Saving as CSV (with a BOM, so Excel opens it cleanly) or XLSX

What it doesn’t do

  • Several sheets in one CSV (the format has just one table)
  • Saving formulas or formatting into CSV (CSV holds text, so only results are kept)
  • Several people editing the file at once

FAQ

What opens a CSV file?

A CSV is a plain-text table separated by commas, and any spreadsheet program can open it. Drop it here and it becomes an editable sheet — no Excel needed.

What if the text looks garbled?

We read the file as UTF-8 first and fall back to the legacy encoding common for your language (GBK for Chinese, Shift_JIS for Japanese and so on), which gets most files right. If it is still wrong, re-save it as “CSV UTF-8” in the original program.

How do I save it back as CSV?

File ▸ Download ▸ CSV. It is UTF-8 with a BOM, so Excel opens it without garbling.

What about semicolons or tabs?

Yes, the delimiter is detected automatically, and .tsv files are read as tab-separated.

Is the file uploaded?

Not while you are signed out — the file stays in your browser. It is uploaded only if you sign in and choose “Save to cloud”.

Can I open a very large CSV?

We set no size limit; whether it opens depends on your device’s memory, and files with hundreds of thousands of rows will be slow.