i Hate Regex - The Regex Cheat Sheet
i Hate Regex is a regex cheat sheet that also explains the commonly used expressions so that you understand it. Stop hating and start learning.
Categories:
iHateRegex.io is a visual regex cheat sheet and interactive playground designed for developers who dread writing regular expressions from scratch.
🚀 Overview
iHateRegex.io is an open-source regex cheat sheet that makes learning and using regular expressions less painful. It provides pre-built regex patterns for common data validations like emails, phone numbers, and passwords, complete with visual breakdowns and explanations to help users understand rather than just copy-paste.
The site includes an interactive playground for testing regex, embeddable widgets, and a submission system for community contributions. Built by Geon George out of frustration with regex complexity, it turns a notoriously tricky topic into an approachable resource.
Answer these questions:
- What problem does this project solve? Regex is hard to write, read, and debug—iHateRegex provides ready-to-use patterns with visuals and tests to simplify validation tasks.
- Who is it built for? Developers, programmers, and beginners struggling with regex in their code.
- Why did you build it? The creator hated regex so much they made this tool to understand and share better ways to handle it.
Keep it human and honest.
✨ Key Features
- Visual Regex Breakdown: See regex patterns as diagrams for easier comprehension (inspired by Regexper).
- Interactive Playground: Test regex live at https://ihateregex.io/playground, hide matches, embed code snippets.
- Cheat Sheet Categories: Pre-built regex for username, phone number, email, date, ASCII, password, IP address, IPv6, SSN—with markdown explanations.
- Community-Driven: Submit new regex via Google Form; save personal ones (user auth mentioned, though possibly limited).
- Optional: Embeddable widgets, shareable links.
🛠 Tech Stack
- Frontend: Nuxt.js, Vue.js, Tailwind CSS, SCSS
- Backend: Static (no server-side mentioned)
- Database: JSON data file (/static/regex/data.json)
- Auth: Custom (user login for saving regex)
- Hosting: Netlify
👥 Who Is This For?
This project is useful for:
- Developers who want to quickly validate user input without regex headaches
- Teams looking for reliable, explained regex patterns
- Indie makers building forms and need common validations
📸 Screenshots / Demo
- Live demo: https://ihateregex.io
- GitHub: https://github.com/geongeorge/i-hate-regex
🔥 Project Status
- 🟡 Maintained
Last updated: 2020-10-11
❓ FAQ
Is this project free?
Yes / Open Source (Fully free to use, no paid tiers.)
Is the source code available?
Yes — https://github.com/geongeorge/i-hate-regex
Can I contribute?
Add new regex to /static/regex/data.json and create a markdown explanation in /static/regex/markdown/. Submit PRs on GitHub or use the Google Form at https://forms.gle/Cwo3VupujQJzeoYQ9 for suggestions. Join Telegram chat https://t.me/ihateregex for discussion.
📬 Contact & Links
- Website: https://ihateregex.io
- GitHub: https://github.com/geongeorge/i-hate-regex
- Twitter/X: https://x.com/ihateregex
- Email: (via GitHub issues or OpenCollective https://opencollective.com/ihateregex)
Built with ❤️ and kept warm on WarmIndex.
Similar apps
Hashnode — Blogging Platform for Builders in Tech
hashnode.com
Hashnode is a blogging platform where developers, engineers, and tech leaders write to sharpen ideas, share knowledge, and build their reputation. Start for free.
Pages CMS
pagescms.org
Manage content and media right in your GitHub repository. No database, no API, no extra backend.
REI3 - The Open Low-Code Platform
rei3.dehome_en
Open and powerful low-code development with REI3. Free to use and easy to install on your own systems - anyone can meet their business software needs with REI3.
Welcome – Prosody IM
prosody.im
Prosody is a Jabber/XMPP server written in Lua