Regex API

Free regex testing, matching, replacing, and splitting. No signup. No API key.

Endpoints

POST /regex/test

Test a regex pattern against a string. Returns all matches with groups and positions.

curl -X POST https://forge-node.tail2b516d.ts.net/regex/test \
  -H "Content-Type: application/json" \
  -d '{"pattern": "\\d+", "test_string": "abc 123 def 456", "flags": "i"}'

Field	Type	Required	Description
pattern	string	Yes	Regex pattern
test_string	string	Yes	String to test against
flags	string	No	Flags: i (ignore case), m (multiline), s (dotall), x (verbose), a (ascii)
replacement	string	No	If provided, also returns the replaced string

POST /regex/split

Split a string using a regex pattern.

curl -X POST https://forge-node.tail2b516d.ts.net/regex/split \
  -H "Content-Type: application/json" \
  -d '{"pattern": "[,;\\s]+", "test_string": "a, b; c  d"}'

GET /regex/patterns

Library of 12 common regex patterns (email, URL, IP, phone, date, etc.).

curl https://forge-node.tail2b516d.ts.net/regex/patterns

Flags

Flag	Name	Description
i	IGNORECASE	Case-insensitive matching
m	MULTILINE	^ and $ match line boundaries
s	DOTALL	. matches newline characters
x	VERBOSE	Allow comments in pattern
a	ASCII	ASCII-only matching for \w, \d, etc.

Rate Limits

120 requests per minute per IP. No API key needed.