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Regex replace
Replace text with a regular expression and see the result before you copy it. Use $1 or a group name to reuse parts of the match, for example to turn 2026-09-24 into 24.09.2026. It runs in your browser and nothing is uploaded.
How to replace text with a regex
- 1Type the pattern and tick the flags you need
- 2Open "Replace" and type the replacement
- 3Copy the preview
- Your text with every match replaced.
What you get
- Preview as you type.The result and the number of replacements update with every keystroke.
- Groups in the replacement.Use $1, lt;name> for named groups, and amp; for the whole match.
- Nothing is uploaded.Your text is processed by your browser, on your own device.
What you can do
- Replace every match, or only the first one, by switching the "Global" flag.
- Reorder parts of a match: with the pattern (?<year>\d+)-(?<month>\d+)-(?<day>\d+) the replacement lt;day>.lt;month>.lt;year> turns a date around.
- Show how many replacements were made.
- Switch to the Matches view to see what the pattern finds before you replace, and to Explain to read it in plain English.
- Use the other flags too: ignore case, multi-line, dot all, Unicode and sticky.
Good to know
- The tool uses the JavaScript regex flavour, and the replacement follows JavaScript's rules. $ gives a literal dollar sign.
- Without the "Global" flag only the first match is replaced.
- The original text is not changed. You get the new text as a preview, to copy or save.
- For plain text without regex, or with options like whole word, use Find and replace text.
Questions
How do I replace text with a regular expression?
Type the pattern, open "Replace", type the replacement and paste your text. The preview shows the result at once.
How do I use capture groups in the replacement?
Write $1, $2 and so on for numbered groups, or lt;name> for a named group. amp; stands for the whole match.
Why was only the first match replaced?
The "Global" flag is off. Tick it to replace every match.
Is my text uploaded?
No. Matching and replacing run in your browser, so your text stays on your device.