Regex Lab 🧪 — Regex Tester & Validator

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.

Regex Tester: send a regex pattern plus sample text, get back every match with its capture groups and a plain-English explanation of what the pattern does. Simple JSON in, JSON out via the Apify API — pay only per result, so a quick pattern check costs next to nothing.

🔥 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

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.

Find email addresses for company domains by crawling homepage, contact, about, and team pages (mailto, regex, JSON-LD) and generating common email patterns from full names. Lead-gen ready with confidence scores.

Extract structured entities from free text: email addresses, URLs, phone numbers (incl. Japanese formats and full-width digits), dates (ISO, slash, Japanese 年月日) and IP addresses. Deterministic regex extraction with per-kind counts — fast, cheap, no LLM.