Visual Regex Builder
Build regular expressions visually with an intuitive drag-and-drop interface. No regex knowledge required - learn as you build! All processing happens in your browser.
Pattern Canvas
Drag blocks here to build your regex pattern
Drag blocks from the palette to start building your pattern
How to Use
Building Your Pattern
- •Drag blocks from the left palette to the canvas
- •Hover over blocks to see their descriptions
- •Click the edit icon to add quantifiers or customize blocks
- •Click the X to remove blocks you don't need
- •Watch the pattern generate in real-time on the right
Testing & Exporting
- •Enter test text to see matches in real-time
- •Read the plain-English explanation of your pattern
- •Copy the generated pattern for use anywhere
- •Click "Open in Regex Tester" for advanced testing
- •Load sample patterns to learn common use cases
Understanding Blocks
Character Classes
Match specific types of characters like digits, letters, or whitespace.
- Digit: Numbers 0-9
- Word: Letters, numbers, underscore
- Letter: Any alphabetic character
Quantifiers
Control how many times a pattern should match.
- + (One or More): At least once
- * (Zero or More): Any number of times
- ? (Optional): Zero or one time
Anchors
Match positions in the text rather than characters.
- ^ (Start): Beginning of line
- $ (End): End of line
- \b (Boundary): Word edge
Common Use Cases
Email Validation
Match standard email addresses like user@domain.com
^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$ Phone Numbers
Match US phone numbers in format 555-123-4567
\d{3}-\d{3}-\d{4} URLs
Match web URLs starting with http or https
https?://[^\s]+ Dates
Match dates in YYYY-MM-DD format
\d{4}-\d{2}-\d{2}