Regex Builder & Tester
Build and test regular expressions for common patterns like emails, URLs, and phone numbers.
このレシピの使いどころ
Regular expressions power input validation, text extraction, and search-and-replace. This workflow helps build and verify patterns before deploying them to production code.
ステップ
Regex Tester
このツールを試す →Build and test regex patterns
Regex Tester
このツールを試す →Validate URL patterns
よくある質問
Should I use regex for email validation?
For basic validation, regex works. For production, use a dedicated email validation library that checks MX records. The full email RFC 5322 regex is 6,000+ characters.
What is ReDoS and how do I prevent it?
ReDoS (Regular Expression Denial of Service) occurs when crafted input causes exponential backtracking. Avoid nested quantifiers like (a+)+ and use atomic groups or possessive quantifiers.
関連レシピ
API Debug Toolkit
Debug API responses by formatting JSON, decoding Base64 payloads, and parsing URL parameters.
Data Transform Pipeline
Transform data through JSON formatting, Base64 encoding, hashing, and UUID generation for ETL workflows.
Code Review Helper
Compare code versions with diff, format JSON configs, and validate changes for thorough code reviews.
Cron Schedule Planner
Design and validate cron schedules for different environments with timezone awareness.