Validation

Regex Tester

Run PCRE-compatible patterns against sample content and inspect the match output as structured JSON.

INFO POST /regex/test Open API docs

Pattern

Enter the pattern without delimiters.

Flags

Optional flags like i, m, s, or u.

Subject Text

Paste the text you want to test against the pattern.

Output

Server-side output from the same processor used by the public API endpoint.

API usage

curl -X POST \
  'https://api.sloxlydev.in/regex/test' \
  -H 'Content-Type: application/json' \
  -d '{"pattern":"\\bdev\\b","flags":"i","subject":"SLOXLYDEV builds developer tools."}'

How it works

The regex tester compiles the submitted pattern as a PCRE expression, applies any supported flags, and returns each match in structured JSON. Invalid expressions are rejected with validation feedback.

Example

Input sample

Pattern: \bdev\b, Flags: i, Subject: SLOXLYDEV builds developer tools.

Example

Output sample

{
    "matched": true,
    "match_count": 1,
    "pattern": "\\bdev\\b",
    "flags": "i",
    "matches": [
        {
            "full_match": "DEV",
            "groups": []
        }
    ]
}

API usage

Integration notes

Send pattern, flags, and subject fields to the endpoint. The response includes match metadata and normalized match groups.

FAQ

Common questions

Which regex engine is used?: The tester uses PHP PCRE behavior, so results align with server-side matching in a PHP stack.