GameParticles

Regex Tester

DeveloperNew

Write a regex pattern, apply flags, and see matches highlighted in real time. Shows capture groups.

//
Ln 1UTF-8
Matches
0 matches
Enter a pattern above

Works great for

Input Validation Rules

Developers build and test email, phone number, and URL validation patterns before embedding them in form logic. Live highlighting instantly confirms which strings match.

📋

Log Parsing Patterns

Data engineers write regex to extract timestamps, error codes, and request paths from server or application logs. Real test data lets you verify the pattern handles edge cases.

🧪

QA Form Field Testing

QA engineers test that form field validation regexes accept valid inputs and reject invalid ones. The match count and index details help pinpoint exactly where a pattern fails.

📖

Learning Regular Expressions

Beginners learn regex interactively by tweaking patterns and watching highlighted matches update in real time. Flag toggles like global and case-insensitive make concepts tangible.

🐛

Debugging Complex Patterns

Debug greedy quantifiers, named capture groups, and lookaheads by pasting real production strings as test input. The matches panel shows each capture group value side by side.

🔍

Extracting Structured Data

Extract specific fields like dates, currency values, or identifiers from unstructured text files. Copy all matched values with one click for use in a spreadsheet or script.

regex testerregular expression testerregex matcherregex validatortest regexregex patternregex flagscapture groupsregex matchregex debugging
JSON Formatter
Developer · Format, validate and minify JSON with syntax highlighting.
Base64 Encode / Decode
Developer · Encode text to Base64 or decode Base64 back to plain text.
URL Encoder / Decoder
Developer · Encode or decode URL components and query strings.
Hash Generator
Developer · Generate MD5, SHA-1, SHA-256 and SHA-512 hashes.
UUID Generator
Developer · Generate UUIDs v4 (random) in bulk with one click.
Regex Tester
Developer · Test regular expressions against text with live match highlighting.
Word Counter
Text · Count words, characters, sentences, paragraphs and reading time.
Case Converter
Text · Convert text between UPPER, lower, Title, camelCase, snake_case and more.
List Sorter
Text · Sort, reverse, deduplicate and shuffle lists of text.
Markdown Preview
Text · Write Markdown and see a live rendered preview side by side.
Percentage Calculator
Numbers · Calculate percentages, increases, decreases and what % one number is of another.
Color Converter
Colors · Convert colors between HEX, RGB, HSL and HSV instantly.
Snake
Arcade · Eat food, grow longer, don't hit the walls. A timeless classic.
2048
Puzzle · Slide tiles and combine them to reach the legendary 2048 tile.