Extract with Regex from TSV Files Online
Extract text matching a regular expression from TSV files directly in your browser. Pull out emails, URLs, phone numbers, or any pattern into a new column — no upload required.
How to extract with Regex from TSV files
- Drop your file onto the upload area. The first 200 rows are shown, and the first text column is selected for you.
- Pick the text column to search. Only text (VARCHAR) columns are listed, so a column the reader loaded as numbers or dates will not appear.
- Type a regular expression, such as [A-Z]+-\d+, and name the new column. The default name is extracted.
- Choose First match, or All matches to join every match in a cell with a comma and a space. Click Extract.
- Check the new column at the end of the preview, then download the result in the same format you uploaded.
Your file is processed locally in your browser and is never uploaded. The free limit is 50 MB per file; larger files work if your device has the memory for them.
Worked example
A release manager exports the commit log for a sprint and wants a list of the Jira issue keys each commit mentions, so the release notes can link to the tickets.
Input (TSV)
commit author message
a41f9c2 priya PAY-212 fix rounding in invoice totals
7be03d1 tom Merge PAY-215 and WEB-88 hotfixes
c9d2e47 priya Bump lodash to 4.17.21
e18a6b0 sam web-91: tidy header spacingSettings
- Text column: message
- Regex pattern: [A-Z]+-\d+
- Output column name: issue_keys
- Match mode: All matches (comma-separated)
Result
| commit | author | message | issue_keys |
|---|---|---|---|
| a41f9c2 | priya | PAY-212 fix rounding in invoice totals | PAY-212 |
| 7be03d1 | tom | Merge PAY-215 and WEB-88 hotfixes | PAY-215, WEB-88 |
| c9d2e47 | priya | Bump lodash to 4.17.21 | NULL |
| e18a6b0 | sam | web-91: tidy header spacing | NULL |
All original columns are kept and issue_keys is added at the end. The merge commit mentions two tickets, so both are joined with a comma and a space. The lodash bump has no match and gets NULL. So does web-91, because matching is case-sensitive and the pattern only allows capital letters. Start the pattern with (?i) to ignore case.
Frequently Asked Questions
What happens when a cell has no match?
The new column holds NULL, in both First match and All matches mode. Cells that were already NULL stay NULL.
Can I extract only a capture group?
Yes. If the pattern has a capture group, the text inside the first group is returned. SKU-(\d+) returns 4471 from SKU-4471. Without parentheses the whole match is returned. Use (?:...) for grouping that should not capture.
Which regex syntax is supported?
RE2 syntax. Character classes, quantifiers, alternation, anchors and inline flags such as (?i) all work. Lookaheads, lookbehinds and backreferences are not supported and return an error. Matching is case-sensitive unless you add (?i).
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