Regex Tester - Matches, Groups, Explanation, ReDoS Warnings

Regex Lab 🧪 — Regex Tester & Validator

perryay/regex-lab

Interactive regex testing tool supporting findall, match, search, split, and sub (replace) modes. Test patterns against sample text, view full match details, capture groups, named groups, and detailed error messages for invalid patterns.

Regex Builder — AI-Powered Pattern Generator

obedient_hierarchy/regex-builder

Build regex patterns from natural language, test against sample data, explain any regex in plain English, validate and optimize patterns, find/replace with backreferences. 15 pre-built patterns for email, URL, phone, date, UUID, text/ID, and more.

🔥 7-DAY LAUNCH SPRINT (May 1–8, 2026): First 100 runs free for new users. Test regular expressions against sample text, get human-readable pattern explanations, find all matches with capture groups, and benchmark pattern performance. Supports common regex presets.

Regex Helper

maximedupre/regex-helper

Apply named regular expressions to submitted text or an Apify dataset. Get matches by pattern with values, positions, capture groups, and a total match count.

Regex Helper

rl1987/regex-helper

Apply named regular expressions to a list of strings and extract structured matches. Handy for contact info extraction and other text-processing workflows.

Statically gate agent-generated regular expressions for nested repetition, unsafe backtracking, excessive complexity and forbidden features.

Bulk scrape patterns on websites

MCP server: text diff, regex test/extract, case convert, slugify, word/char count, readability. Pure compute, zero-maintenance.