Payload Fuzzer

Generate payload variations using mutation strategies. Test against custom filters and create encoding chains to identify potential WAF bypasses.

For authorized testing only. These mutation techniques are designed for educational purposes and authorized security testing. Only use on systems you own or have explicit permission to test.

Fuzzer Mode

Base Payload

0 characters

Mutation Strategies

Result Limit

Max: 500 mutations

Limit the number of mutations displayed (1-500). Default: 100.

Filter Testing(Optional)

Test each mutation against a filter pattern to identify potential bypasses

No Mutations Generated

Enter a base payload, select mutation strategies, and click "Generate Mutations" to begin fuzzing.

Mutation Strategies Explained

1Encoding Mutations

Transform payloads using various encoding schemes to bypass filters that check for specific string patterns.

  • •HTML Entities: Convert to decimal or hex entities
  • •URL Encoding: Single or double percent-encoding
  • •Unicode Escapes: \uXXXX or \xXX format
  • •Base64: Encode with data URI wrapper

2Case Variations

Modify character casing to bypass case-sensitive filters and WAF rules.

  • •Uppercase: ALL CAPS transformation
  • •Lowercase: all lowercase transformation
  • •Mixed Case: Capitalize first letters
  • •Alternating: aLtErNaTiNg case pattern

3Character Substitution

Replace specific characters with functional alternatives to evade detection.

  • •Quote Variations: Switch between ", ', and `
  • •Whitespace: Use tabs, newlines, or form feeds
  • •Null Bytes: Insert \x00 to truncate strings

4Structure Mutations

Modify HTML/JavaScript structure while maintaining functionality.

  • •Comments: Insert HTML or JS comments
  • •Self-Closing Tags: Add/remove /> syntax
  • •Protocols: Vary javascript:, data:, vbscript:

5Obfuscation Techniques

Advanced techniques to hide payload intent from pattern-based detection.

  • •String Concatenation: 'al'+'ert' patterns
  • •Template Literals: Use backticks for execution
  • •Hex Strings: \x escape sequences

6Filter Testing

Automatically test generated mutations against custom WAF rules or blacklists.

  • •Regex Patterns: Test against regex-based filters
  • •String Matching: Check for blacklisted strings
  • •Bypass Identification: Highlight successful bypasses

Common Use Cases

WAF Bypass Testing

Generate variations to test Web Application Firewall effectiveness and identify potential bypass techniques for responsible disclosure.

Payload Library Building

Create comprehensive payload collections for security tools like Burp Suite intruder or OWASP ZAP fuzzer modules.

Security Training

Educate developers and security teams about encoding techniques and mutation strategies used in real-world attacks.