How to use: Common Regex Library

Common Regex Library is a free online Regex Tools tool that ready-made patterns for email, URL, phone, dates and more instantly in your browser. Paste your data, adjust the options and get the result in real time — no installation, no sign-up, and nothing is ever uploaded to a server.

Input Common Regex Library Output Runs 100% in your browser — your data never leaves your device.
Common Regex Library — Input → Output. Runs 100% in your browser — your data never leaves your device.

How to use

Using Common Regex Library takes three steps:

  1. Paste your data into the input box (or load the example).
  2. Configure the options to match your target format or scenario.
  3. Copy, download or inspect the output — it updates live as you type.
How to use · Common Regex Library 1 Input Paste your data intothe input box (or loadthe example). 2 Options Configure the optionsto match your targetformat or scenario. 3 Output Copy, download orinspect the output —it updates live as youtype.
How to use — 3

Description

Ready-made patterns for email, URL, phone, dates and more.

Because everything is computed client-side, Common Regex Library is safe to use with sensitive data such as API keys, tokens or private logs.

Run

These ready-made examples show typical inputs and the exact output Common Regex Library produces for them.

Examples

Email pattern test.

user@mail.com

Use cases

Common situations where Common Regex Library helps:

  • Ready-made patterns for email, URL, phone, dates and more.
  • Because everything is computed client-side, Common Regex Library is safe to use with sensitive data such as API keys, tokens or private logs.

FAQ

What is Common Regex Library?

Common Regex Library ready-made patterns for email, URL, phone, dates and more. It runs entirely in your browser, so your data stays private.

Is Common Regex Library free to use?

Yes. Common Regex Library is free, unlimited and works without registration or installation.

Does my data get uploaded?

No. All processing happens locally in your browser; nothing is sent to any server.

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