Regex TesterLocal Regex Debugger

Test and debug regular expressions instantly in your browser. 100% local, privacy-first.

Regex Tester

Test and debug regular expressions instantly in your browser. 100% local, privacy-first.

Regular Expression

Flags

Test String

Common Patterns

Email Address

Match email addresses

[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}

URL

Match HTTP/HTTPS URLs

https?:\/\/[\w\-._~:/?#[\]@!$&'()*+,;=%]+

Phone Number

Match phone numbers

\+?[\d\s\-().]{10,}

IPv4 Address

Match IPv4 addresses

\b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b

Date (YYYY-MM-DD)

Match dates in ISO format

\d{4}-\d{2}-\d{2}

Time (HH:MM:SS)

Match time in 24-hour format

(?:[01]\d|2[0-3]):[0-5]\d:[0-5]\d

Hex Color

Match hex color codes

#(?:[0-9a-fA-F]{3}){1,2}\b

Username

Match usernames (3-16 chars, starts with letter)

^[a-zA-Z][a-zA-Z0-9_]{2,15}$

Strong Password

Match strong passwords (8+ chars, upper, lower, number, special)

^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}$

Credit Card

Match credit card numbers

\b(?:\d{4}[- ]?){3}\d{4}\b

常見問題

關於此工具您需要了解的一切。

Is this secure?

Yes. All regex testing happens locally in your browser. No data is sent to any server.

What flags are supported?

We support global (g), case-insensitive (i), multiline (m), dotAll (s), and unicode (u) flags.

隱私安全

所有處理都在瀏覽器中 100% 完成。文件從未上傳到任何服務器。

極速體驗

由 WebAssembly 驅動，提供近乎原生的性能。無需等待上傳。

無需安裝

在任何設備 (Windows, Mac, Chromebook, 手機) 的 Chrome/Edge/Firefox 瀏覽器中直接運行。

Regex TesterLocal Regex Debugger

Test and debug regular expressions instantly in your browser. 100% local, privacy-first.

Regex Tester

Test and debug regular expressions instantly in your browser. 100% local, privacy-first.

Regular Expression

Flags

Test String

Common Patterns

Email Address

Match email addresses

[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}

URL

Match HTTP/HTTPS URLs

https?:\/\/[\w\-._~:/?#[\]@!$&'()*+,;=%]+

Phone Number

Match phone numbers

\+?[\d\s\-().]{10,}

IPv4 Address

Match IPv4 addresses

\b(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\b

Date (YYYY-MM-DD)

Match dates in ISO format

\d{4}-\d{2}-\d{2}

Time (HH:MM:SS)

Match time in 24-hour format

(?:[01]\d|2[0-3]):[0-5]\d:[0-5]\d

Hex Color

Match hex color codes

#(?:[0-9a-fA-F]{3}){1,2}\b

Username

Match usernames (3-16 chars, starts with letter)

^[a-zA-Z][a-zA-Z0-9_]{2,15}$

Strong Password

Match strong passwords (8+ chars, upper, lower, number, special)

^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]{8,}$

Credit Card

Match credit card numbers

\b(?:\d{4}[- ]?){3}\d{4}\b

常見問題

關於此工具您需要了解的一切。

Is this secure?

Yes. All regex testing happens locally in your browser. No data is sent to any server.

What flags are supported?

We support global (g), case-insensitive (i), multiline (m), dotAll (s), and unicode (u) flags.

隱私安全

所有處理都在瀏覽器中 100% 完成。文件從未上傳到任何服務器。

極速體驗

由 WebAssembly 驅動，提供近乎原生的性能。無需等待上傳。

無需安裝

在任何設備 (Windows, Mac, Chromebook, 手機) 的 Chrome/Edge/Firefox 瀏覽器中直接運行。