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Box shadow generator
PX to REM converter

Palindrome checker
Binary text translator
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Character frequency counter
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HTML to Markdown
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Ed25519 key pair generator
Email Address Validator
EXIF Metadata Stripper
File Encryptor (AES)
Hash Comparison
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HMAC generator
JWT Decoder
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JWT Validator
Password generator
Password strength checker
PEM Certificate Inspector
RSA key pair generator
security.txt Generator
SQL Injection Detector
SSH Key Pair Generator
Text Encryptor
Random Token Generator
TOTP Generator

Bandwidth calculator
curl to code
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HTTP header parser
IPv6 expander
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Postman collection builder
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Subnet calculator
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Redirect chain checker
User-Agent parser
WebSocket frame parser
WHOIS lookup

Compound Interest Calculator
Loan and Mortgage Calculator
Tip and Bill Splitter

SMD Resistor Code Decoder

GPA and Grade Calculator

Kitchen Unit Converter

Biorhythm Calculator
BMR and TDEE Calculator
Pregnancy Due Date Calculator
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Text analysis
Regex explainer

en fr ru

Regex explainer

Parse a regular expression and describe every node, group and flag.

Input

Fill in the fields below, then run the tool.

Regular expression

Processed on the server and never stored. Press Ctrl/⌘ + Enter to run.

Result

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About this tool

Parse a regular expression and describe every node, group and flag.

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Palindrome checker

Check whether a word or sentence reads the same forwards and backwards.

Binary text translator

Convert text to binary digits and back, in bytes or nibbles.

Text case converter

Convert text to UPPER, lower, Title, Sentence, camelCase, snake_case, kebab-case and more.

Character frequency counter

Count characters, words or bigrams and rank them by frequency.

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Version 0.1.0

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APCA contrast calculator Color
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Colour contrast checker Color
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Colour shades generator Color
CSS gradient generator Color
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Aspect ratio calculator Design
Border radius generator Design
Box shadow generator Design
PX to REM converter Design
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Binary text translator Text analysis
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Character frequency counter Text analysis
Find and replace Text analysis
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Keyword extractor Text analysis
Markdown formatter Text analysis
Markdown linter Text analysis
Markdown to HTML Text analysis
Markdown to plain text Text analysis
Readability score Text analysis
Regex explainer Text analysis
Regex tester Text analysis
ROT13 and Caesar cipher Text analysis
String escape and unescape Text analysis
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Word counter Text analysis
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security.txt Generator Security
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