Hash Cracker/Rainbow Table Lookup
Search for hash values in rainbow tables to find corresponding plaintext passwords. Educational tool for understanding hash cracking techniques.
Interactive Tool
Security Notice
- • This tool uses a limited rainbow table for educational purposes
- • Only common passwords and hashes are included in the database
- • This is not a comprehensive hash cracking tool
- • For real security testing, use dedicated hash cracking tools
- • This tool is for educational and testing purposes only
About Rainbow Tables
Rainbow tables are precomputed tables used to reverse cryptographic hash functions. They contain hash values and their corresponding plaintext inputs, allowing for quick lookup of common passwords. This tool demonstrates the concept using a limited set of common hashes for educational purposes.
How to Use
How to Use the Hash Cracker
- Enter Hash: Paste or type the hash value you want to search for
- Select Algorithms: Choose which hash algorithms to check against the rainbow table
- Search: Click "Search Rainbow Table" to look for matches
- Review Results: Check the results to see if any matches were found
- Copy Results: Use the copy button to copy hash values to clipboard
Understanding the Results
- Found: Hash was found in the rainbow table with corresponding plaintext
- Not Found: Hash was not found in the rainbow table
- Algorithm: The hash algorithm that was checked
- Plaintext: The original password/input that produced the hash
- Source: Indicates the source of the rainbow table data
Common Use Cases
Common Use Cases
Educational Purposes
Learn about hash cracking techniques and password security vulnerabilities.
Security Testing
Test password strength and identify weak passwords in your systems.
Forensic Analysis
Analyze hash values found during digital forensics investigations.
Penetration Testing
Test password security during authorized security assessments.
Password Recovery
Recover forgotten passwords from hash values (ethical use only).
Security Research
Research password patterns and common password vulnerabilities.
About This Tool
What is a Rainbow Table?
A rainbow table is a precomputed table used to reverse cryptographic hash functions. It contains hash values and their corresponding plaintext inputs, allowing for quick lookup of common passwords without the need for brute force attacks.
How Rainbow Tables Work
- Precomputation: Hash values for common passwords are calculated in advance
- Storage: Hash-to-plaintext mappings are stored in a lookup table
- Lookup: When a hash is found, the corresponding plaintext can be retrieved instantly
- Limitations: Only works for passwords that have been precomputed
Supported Hash Algorithms
MD5 (128-bit)
Common hash algorithm with known vulnerabilities. Many rainbow tables exist for MD5.
SHA1 (160-bit)
Widely used hash function with extensive rainbow table coverage.
SHA256 (256-bit)
More secure hash function with limited rainbow table coverage.
SHA512 (512-bit)
High-security hash with minimal rainbow table coverage.
NTLM
Windows authentication hash with extensive rainbow table coverage.
Technical Details
Technical Implementation
This hash cracker uses a simulated rainbow table containing common passwords and their corresponding hash values. The tool demonstrates the concept of rainbow table attacks for educational purposes.
Rainbow Table Structure
| Algorithm | Hash Length | Coverage | Common Passwords |
|---|---|---|---|
| MD5 | 32 characters | High | 10 common passwords |
| SHA1 | 40 characters | High | 10 common passwords |
| SHA256 | 64 characters | Medium | 10 common passwords |
| SHA512 | 128 characters | Low | 10 common passwords |
| NTLM | 32 characters | High | 10 common passwords |
Search Process
- Input hash is normalized (lowercase, trimmed)
- Hash is searched against the selected algorithm's rainbow table
- If found, the corresponding plaintext is returned
- If not found, "not found" status is returned
Performance Considerations
- Lookup time is O(1) for hash table searches
- Memory usage is minimal for this limited dataset
- Search is performed client-side for privacy
- No data is transmitted to external servers
Security Considerations
Security Considerations
⚠️ Educational Purpose Only
This tool is designed for educational purposes only. The rainbow table contains only a limited set of common passwords for demonstration.
🚫 Ethical Use Required
Only use this tool on hashes you own or have explicit permission to test. Unauthorized hash cracking is illegal and unethical.
🔒 Privacy & Security
- • All searches are performed locally in your browser
- • No hash values are sent to external servers
- • Search queries are not logged or stored
- • Results are temporary and not saved
✅ Best Practices
- • Use strong, unique passwords for all accounts
- • Enable two-factor authentication where possible
- • Use password managers to generate secure passwords
- • Regularly audit password security in your systems
- • Implement proper password hashing with salt
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