What this tool does
Analyzes RSA keys to report modulus size, public exponent, and common format issues.
This page focuses on practical, step‑by‑step usage for **RSA Key Analyzer**, with clear examples and common pitfalls.
When you should use it
Use it when auditing key strength (2048/3072/4096), converting formats, or troubleshooting TLS setups.
How to use
- Paste PEM/DER key material.
- Review key size and parameters.
- Confirm that the key meets your policy requirements.
Quick example
Example: Check that a server certificate key is 2048-bit or stronger per your baseline.
Notes
Large keys improve security but can impact performance; choose sizes based on your environment.
RSA Key Analyzer
Analyze RSA keys in real-time. Check security, extract parameters, validate certificates.
RSA Key Analysis Features
Security Analysis
Detect weak keys, small exponents, vulnerable parameters
True RSA Math
Real mathematical analysis using JavaScript BigInt
Fingerprint Generation
MD5, SHA1, SHA256 fingerprints for identification
True Parameter Extraction
Extract real n, e, d, p, q values from keys
What is RSA Key Analysis?
RSA key analysis is the process of examining RSA cryptographic keys to determine their security parameters, strength, and potential vulnerabilities. Our RSA key analyzer provides comprehensive insights into your RSA public and private keys.
FAQ
Is RSA Key Analyzer encryption?
No. It is primarily an analysis/encoding utility. If you need confidentiality, use a real encryption scheme and manage keys properly.
What should I do if the input fails to decode/parse?
Start by checking for missing padding, wrong alphabet/variant, or extra whitespace. If the data looks multi-layered, try decoding step-by-step (e.g., URL decode → Base64 decode).
Is it safe to paste sensitive data here?
For best security, avoid pasting real secrets (private keys, live tokens, seed phrases). Use test data or work offline, especially for anything that could grant access or move funds.