Regex Replace
Find and replace with a regular expression, with every match shown before you commit.
Works in your browser. Nothing you type is sent to us.
Cheat sheet
Tested in your browser with its own regular expression engine, the one JavaScript uses. Nothing you type is sent to us.
Regex Replace at a glance
- Price
- Free
- Data sent to us
- None, it runs in your browser
- Sign-up
- Not needed
- Engine
- The browser's JavaScript engine
- Flags
- g, i, m, s, u
- Limit
- 2,000 matches shown per run
How to use Regex Replace
- Type the patternEnter it without the surrounding slashes and tick the flags you need. An error under the box means the pattern does not compile yet.
- Paste the textMatches light up as you type; the list on the right shows each one with its groups.
- Try a replacementType into Replace with to see the text with the matches replaced, then copy the matches or the result.
Type the pattern, paste the text and type the replacement: the matches light up in the text and the result appears below with every match swapped, using $1, $2, $<name> or $& to carry parts of the match into the replacement. Copy the result when it looks right. It is the quickest way to reshape a list, fix a format across a file or prototype the replacement line for a script.
How it works
Regex Replace is a web page that does its work on your own device. Everything you type or choose is worked out by your browser and never sent to a server, so nothing is stored and there is nothing to delete. There is no account, no sign-up and no limit on how often you use it.
Reordering with groups
Capture the parts you want to keep and write them back in a new order: pattern (\d{2})/(\d{2})/(\d{4}) with replacement $3-$2-$1 turns US dates into ISO dates in one go.
Questions
How do I put a literal dollar sign in the replacement?
Write $$. A single $ followed by a digit or < is read as a group reference.
Other shortcuts
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