Extract and Replace Text with Regex

Use regex to find patterns, extract data, or prepare find-and-replace operations before running them in your editor.

Không cần đăng nhập

Regular expression

//g

Flags:

Examples:

Test text

Matches

The quick brown fox jumps over the lazy dog. Pack my box with five dozen liquor jugs.Enter a pattern above to see matches highlighted here.

Text Processing tips

🔤

Test your search pattern here before running a global find-and-replace in your code editor or text processing script.

🎯

Use the "g" (global) flag to see all matches at once. The match count in the top-right updates in real time as you type.

💡

Alternation (cat|dog) matches either word. Useful for extracting multiple related terms from a large body of text in one pass.

🔢

Quantifiers: \d{3} matches exactly 3 digits; \d{2,4} matches 2 to 4 digits; \d+ matches one or more. Test each against your data.

Nhập liệu

Enter your data into the tool above. Everything stays local to your browser.

Xử lý

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Tải xuống

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

✓Hoàn toàn miễn phí — không có chi phí ẩn, mãi mãi

✓Không cần tài khoản, email hoặc đăng nhập

✓Tệp không bao giờ rời khỏi thiết bị của bạn

✓Không có giới hạn kích thước tệp nào

✓Không có hình mờ trên bất kỳ đầu ra nào

Test Regex for Form Validation

Write and test regular expressions for validating

Parse Server Logs with Regex

Write regex patterns to extract timestamps, IP add

Test URL Routing Patterns

Write and test regex patterns for URL routing rule

Extract Data with Regex

Build and test patterns to extract structured data