Convert CSV Delimiter

The character that separates fields on each row of a CSV file. Commas are the default in the US and the original standard, semicolons are common in European locales where comma is the decimal separator, tabs produce “TSV” files, and pipes show up in database dumps.

To import into a tool that only accepts one specific separator (Excel expecting semicolon in Germany, for example), to feed a tab-only pipeline, to swap to pipes for a legacy database import, or to quote-proof fields that contain commas.

Yes. The parser is a real RFC-4180 state machine – it recognises opening/closing quotes, doubled-quote escapes (""), and newlines embedded inside quoted fields. A value like "Smith, John" stays as one field even if it contains the source delimiter.

Yes – pick “Custom…” in either dropdown and type any single character. Multi-character delimiters are rejected with an inline error because they would break every downstream CSV parser that expects 1-char separators.

Never the cell values. Only the separator changes and, where needed, the quoting around each cell so round-trips stay safe. A field whose value contains the new delimiter automatically gets wrapped in quotes.

No. All parsing and rewriting happens in your browser. The tool never makes a network request with your data – no upload, no telemetry, no analytics on the CSV contents.

Around 50,000 rows convert in under 100ms on a modern laptop. Beyond that the live-preview debounce is your friend – paste the full blob and the tool re-parses once per 250ms of idle time.

Yes, completely free – no registration, no limits, no hidden fees. Use it for personal or commercial work.

Auto-detect picks whichever of , \t ; | shows up most on the first line. If the rest of the file uses a different delimiter you can override with the manual or custom selector – the parser only trusts the one you told it to use.

Yes – this is the most common conversion. Pick Tab as source (or leave on Auto) and Comma as target, or vice versa. The tool re-quotes fields whose values now clash with the new delimiter.