Free · No signup · Runs in your browser
CSV Find & Replace
Bulk-edit values across your whole sheet or one column. Plain text or regex, with a count of exactly how many cells changed — all client-side.
Bulk-edit values across your whole sheet or one column. Plain text or regex, with a count of exactly how many cells changed — all client-side.
Upload a CSV, choose where to search and what to swap, and download the rewritten file. No account, no upload to a server — the transform runs entirely in your browser.
Drop in your file. It's parsed locally in the browser; nothing is sent anywhere. Column types are detected automatically.
Pick a scope — all columns or one — then type what to find and what to replace it with. Toggle regular-expression and case-sensitive matching as needed.
See how many cells changed, scan the rewritten preview, and export clean RFC-4180 CSV with quoting handled for you.
Spreadsheet find-and-replace is fiddly and cloud tools want your data. This does the same job in one pass, privately, and tells you exactly what it touched.
Everything runs in your browser. Your CSV never touches a server, so it's safe for customer lists, financials, and anything under NDA.
Switch on regular expressions for pattern-based edits — strip prefixes, normalize codes, collapse whitespace — and fall back to plain text when you don't.
Replace across every column at once, or target a single column so a value in one field doesn't get rewritten in another.
Every run reports the number of cells changed, so you can confirm the edit hit what you expected before exporting.