RSA Decryption Tool

Decrypt your RSA-encrypted data using your private key.

Need to encrypt data?

Private Key

Decrypted Output

Decrypted content will appear here

Note about RSA Decryption:

  • Only the private key corresponding to the public key used for encryption can decrypt the data
  • Keep your private key secure and never share it with anyone
  • This tool supports both single-chunk and multi-chunk encrypted data
  • You can paste JSON formatted encrypted data or raw encrypted text
  • If decryption fails, verify that you're using the correct private key

Supported Input Formats:

  • JSON format: Complete encrypted data object from RSA encryption tool
  • Raw ciphertext: Base64 encoded encrypted data
  • Chunked data: Multiple chunks separated by | (pipe) character
  • Key files: JSON files with privateKey field or raw PEM format

About RSA Decryption

How RSA Decryption Works

RSA decryption uses your private key to recover the original plaintext from encrypted data. The mathematical relationship between public and private keys ensures that only the correct private key can decrypt data encrypted with the corresponding public key.

Decryption Process:

  • Private key is loaded and validated
  • Encrypted data is parsed and prepared
  • Mathematical decryption operation is performed
  • Original plaintext is recovered and displayed

Private Key Security

Your private key is the most critical component of RSA security. It must be protected with the highest level of security to maintain the confidentiality of your encrypted data.

🔒 Security Best Practices:

  • Never share your private key with anyone
  • Store private keys in secure, encrypted storage
  • Use password protection for key files
  • Consider hardware security modules for high-value keys

Troubleshooting Decryption

Wrong Private Key:

Ensure you're using the private key that corresponds to the public key used for encryption.

Corrupted Data:

Verify the encrypted data wasn't modified during transmission or storage.

Format Issues:

Check that the input data is in the correct format (JSON or raw ciphertext).

Data Format Support

  • JSON Format: Complete encrypted data objects with metadata
  • Raw Ciphertext: Direct Base64 encoded encrypted content
  • Chunked Data: Large data split across multiple encryption blocks
  • Key File Loading: Import private keys from JSON or PEM files

Automatic Format Detection:

The tool automatically detects and handles different encrypted data formats for maximum compatibility.