CSV Delimiter Converter
Change a file's delimiter: read CSV with one separator and write it with another, such as comma to tab (TSV) or pipe. Runs in your browser.
How to use the Change delimiter
- 01
Paste your input into the left panel.
- 02
Adjust the options to match your data.
- 03
Copy the result from the right panel.
What it does
This tool re-delimits your data: it parses the input with the delimiter you pick under "From" and writes it out with the "To" delimiter, re-quoting fields as needed.
Use it to make a TSV for a tool that expects tabs, a semicolon file for a European spreadsheet, or a pipe-delimited file when values contain commas.
Private and unlimited
Every conversion happens locally in your browser, so your data is never uploaded, logged or stored on a server. You can use it on confidential exports without a second thought, and it keeps working offline once the page has loaded.
There is no sign-up, no watermark and no row limit: the only ceiling is your device's memory.
Frequently asked questions
Will it re-quote fields correctly?
Yes. It fully parses the input then re-serialises it, so any field that contains the new delimiter, a quote or a line break is quoted according to the CSV standard.
Which delimiter should I use?
Comma is the standard. Pick semicolon in regions where the comma is the decimal separator (common in German and other European exports), tab for TSV files, or pipe when your values already contain commas.
Is there a row or file-size limit?
There is no fixed row cap or daily quota. Because everything runs locally the practical limit is your device's memory, which comfortably handles the tens of thousands of rows most exports contain.
Is my data uploaded anywhere?
No. The conversion runs entirely in your browser with client-side JavaScript, so nothing you paste or drop ever leaves your device. That makes it safe for spreadsheets that contain customer emails, financial figures or other sensitive data.
Sources
Learn more
Comma, Semicolon, or Tab: Why Excel Writes CSV Files That Other Tools Reject
Why Excel exports semicolon CSVs in half of Europe, how the decimal comma causes it, and how to convert or import any delimiter cleanly.
Stop Excel Silently Changing Your CSV Data (Zeros, Dates, Big Numbers)
Excel quietly rewrites CSV data on open: dropped leading zeros, gene names turned into dates, IDs in scientific notation. Why it happens and how to stop it.
ü Instead of ü: Fixing Broken Special Characters in CSV Files
Why ü, é, and € turn into ü, é, and € when Excel opens a CSV, what the UTF-8 byte order mark does, and how to save and repair files correctly.
Query a CSV with SQL, No Database Setup Required
Load a CSV as a SQL table in your browser and answer real questions with WHERE, ORDER BY, GROUP BY, and HAVING. A worked mini-tutorial on one dataset.
What Is a Pivot Table? Rows, Columns, Values, and Aggregation Explained
A pivot table turns a flat list of records into a cross-tab summary. Learn rows, columns, values, and aggregations with a worked CSV example.
CSV Quoting Rules: Why Splitting on Commas Breaks Your Data
What RFC 4180 actually requires: when a CSV field must be quoted, how to escape a double quote, and why naive split-on-comma parsers corrupt rows.