RSA Private Key
RSA Encrypted Text
Decrypted Result
RSA Decryption Information
RSA decryption requires the corresponding private key. Keep your private keys secure and never share them publicly.
RSA Decryption: Decrypt RSA Encrypted Data with Private Key Online
Securely decrypt RSA-encrypted data back to its original format using your private key. Our professional RSA decryption tool supports all key sizes (1024, 2048, 4096-bit) and padding schemes (PKCS#1, OAEP, PSS) for recovering encrypted documents, secure communications, and confidential data with complete privacy protection.
Why Use Our RSA Decryption Tool?
- Complete Key Support: Decrypt data encrypted with 1024, 2048, and 4096-bit RSA keys.
- Multiple Padding Schemes: Support for PKCS#1 v1.5, OAEP, and PSS padding methods.
- File & Text Recovery: Decrypt documents, images, databases, and any encrypted files.
- Format Compatibility: Works with PEM, DER, PKCS#1, and PKCS#8 key formats.
- Real-Time Processing: Instant decryption results as you provide encrypted data and keys.
- Privacy Protection: All decryption happens locally - your keys never leave your browser.
- Error Handling: Clear error messages help troubleshoot decryption issues.
- Cross-Platform Support: Decrypt data created on any platform or RSA implementation.
- Secure Key Handling: Private keys are processed securely without server transmission.
Frequently Asked Questions (FAQs)
1. What do I need to decrypt RSA-encrypted data?
You need the encrypted data, the corresponding RSA private key, and knowledge of the padding scheme used during encryption.
2. Can I decrypt RSA data without the private key?
No, RSA is cryptographically secure. You must have the exact private key that corresponds to the public key used for encryption.
3. Which RSA padding scheme should I use?
OAEP is recommended for new applications, PKCS#1 v1.5 for legacy compatibility, and PSS for digital signatures.
4. Is my private key sent to any servers?
No, all decryption happens locally in your browser. Your private keys and data never leave your device.
5. Can I decrypt files encrypted with other RSA tools?
Yes, as long as you have the correct private key and padding scheme, you can decrypt data from any RSA implementation.
6. What file formats does the tool accept?
We accept PEM, DER, PKCS#1, and PKCS#8 formats for private keys, and various formats for encrypted data.
7. Why am I getting decryption errors?
Common causes include wrong private key, incorrect padding scheme, corrupted data, or key/data format mismatch.
8. Can I decrypt large files with RSA?
RSA is typically used for small data. For large files, RSA usually encrypts a symmetric key that encrypts the actual data.
9. What if I forgot which padding was used?
Try different padding schemes. Our tool will indicate successful decryption when the correct scheme is used.
10. Does this work with SSL certificate private keys?
Yes, you can use SSL certificate private keys to decrypt data that was encrypted with the corresponding public key.
11. Can I verify the decryption was successful?
Yes, successful decryption will produce readable text or valid file data. Invalid results indicate incorrect parameters.
12. Is this tool standards-compliant?
Yes, our implementation follows RFC standards and is compatible with OpenSSL and other standard RSA implementations.
13. Can I decrypt data from mobile apps?
Yes, as long as the mobile app uses standard RSA encryption, you can decrypt the data with the correct private key.
14. How do I handle password-protected private keys?
You'll need to decrypt the private key first using the password, then use the decrypted key for RSA decryption.
15. What browsers support this RSA decryption?
All modern browsers with Web Crypto API support, including Chrome, Firefox, Safari, Edge, and mobile browsers.
16. Can I batch decrypt multiple files?
Yes, you can decrypt multiple files or data blocks using the same private key and decryption settings.
17. Is there a size limit for decryption?
Browser memory limits apply, but the tool can handle typical RSA-encrypted data sizes efficiently.
18. Does the tool work offline?
Yes, after initial page load, all decryption operations work completely offline for enhanced security.
19. Can I use this for forensic analysis?
Perfect for forensics! Decrypt evidence files and encrypted data during security investigations and analysis.
20. Is this RSA decryption tool free?
Yes, completely free with no registration, limitations, or subscription fees required.
Conclusion
Our RSA Decryption tool provides secure, reliable recovery of RSA-encrypted data with support for all key sizes and padding schemes. Whether you're recovering confidential documents, accessing encrypted communications, or performing security analysis, our privacy-focused tool ensures your private keys and data remain completely secure. Decrypt your RSA data safely and efficiently—completely free and offline-capable.