Regex Tester
Test regular expressions in real time with match highlighting, capture groups, flags, $1 replacement and a quick reference. No sign-up.
//gi
Flags
Highlighted matches2 matches
Email me at ana@example.com or JUAN@mail.io and I will reply.
Match details
Match 1index 12
ana@example.comGroup 1: anaGroup 2: example.com
Match 2index 31
JUAN@mail.ioGroup 1: JUANGroup 2: mail.io
Replace
Use $1, $2… or $<name> to insert the captured groups.
Result
Email me at ana at example.com or JUAN at mail.io and I will reply.
Quick reference
.any character\da digit (0-9)\wletter, digit or _\swhitespace\bword boundary^ $start / end*0 or more+1 or more?0 or 1 (optional){n,m}between n and m times[abc]one of a, b or c[^abc]none of a, b, c(…)capturing group(?:…)non-capturing group(?<n>…)named groupa|ba or bEverything is processed in your browser; nothing is sent to any server.