DevTulz Online

What is Text Decryption?

Text decryption converts encrypted data back to its original plain text using cryptographic algorithms and the correct decryption key. For symmetric encryption (AES), you use the same secret key that was used for encryption. For asymmetric encryption (RSA), you use the private key corresponding to the public key used for encryption.

Supported Algorithms:

Symmetric Decryption (AES):

• AES-GCM (Recommended): Provides authenticated encryption with associated data (AEAD). Most secure for general use.
• AES-CBC: Traditional block cipher mode. Requires padding.
• AES-CTR: Counter mode. Converts block cipher to stream cipher.

Asymmetric Decryption (RSA):

• RSA-OAEP: Uses private key for decryption. Requires the corresponding private key to the public key used for encryption.

Expected Input Format:

For AES algorithms: JSON with base64-encoded components

{"iv": "base64_encoded_iv", "data": "base64_encoded_ciphertext"}

Also supports legacy hex format:

{"iv": "hex_encoded_iv", "data": "hex_encoded_ciphertext"}

For RSA: Base64-encoded ciphertext only

base64_encoded_ciphertext

How to Use the Text Decrypt Tool

1. Paste your encrypted data into the input field (JSON format with iv and data for AES, or base64 for RSA).

2. Select the algorithm that was used for encryption.

3. For AES: Enter the secret key that was used for encryption.

4. For RSA: Paste your private key in PEM format.

5. The decrypted text is automatically displayed as you type.

6. Copy the decrypted result for use in your application.

Additional Tips:

• For AES: Use the same secret key that was used for encryption
• For RSA: You need the private key corresponding to the public key used for encryption
• Automatic format detection: The tool automatically detects base64 or hex encoding
• Error handling: If decryption fails, check that you're using the correct algorithm and key

Security Notes

This tool uses the browser's native Web Crypto API for secure decryption. All decryption happens locally in your browser - no data or keys are ever sent to external servers. Make sure you're using the correct algorithm and key that match the encryption method used. The tool supports both base64 (standard) and hex (legacy) encoding formats for AES encrypted data.

Important Notes:

• All decryption happens locally in your browser using the Web Crypto API
• Your private keys and secrets never leave your browser
• For RSA decryption, you decrypt with a private key; the data was encrypted with the corresponding public key
• Keep your private keys and secret keys secure - they are the only way to decrypt your data
• The tool supports both base64 (standard) and hex (legacy) encoding formats

This free online text decryption tool is fast, secure, and works entirely in your browser. All decryption is performed locally using the Web Crypto API - no data is sent to any server. Perfect for developers, security professionals, and anyone needing to decrypt text data encrypted with AES or RSA algorithms.

Keywords: text decryption online, AES decryption, decrypt text, AES-GCM, AES-CBC, AES-CTR, RSA-OAEP, secure text decryption, free decryption tool, Web Crypto API decryption, client-side decryption