How it works, what you get, limits
What it does
Replace with a pattern. $1 groups are allowed.
How to use
Enter the pattern and replacement.
What you get
A rewritten draft. Copy it locally.
Options and comparison
JavaScript replacement syntax.
Find/replace is for plain swaps; this page is regex.
Limits
A bad pattern fails.
FAQ
Groups?
Yes. Use $1, $2 in the replacement.
Find/replace page?
That page is for plain swaps. This page is for regex.