Text Encryption & Decryption Tool
Description
Encrypt and decrypt text using symmetric algorithms (AES, etc.) with custom keys and modes. Secure client-side processing.
About Text Encryption & Decryption Tool
This tool performs real symmetric encryption and decryption of text using a key you provide, with algorithms such as AES. Symmetric means the same secret key is used to both encrypt and decrypt, so anyone you share the ciphertext with must also receive the key through a separate, secure channel. Unlike Base64 or URL encoding, which are reversible without any secret and provide no confidentiality, this is genuine encryption: without the correct key the plaintext cannot be recovered. All processing runs client-side in your browser.
How to use
- Choose whether you want to encrypt or decrypt.
- Enter your text (plaintext to encrypt, or ciphertext to decrypt) and your secret key.
- Select the algorithm and mode if options are available.
- Run the operation and copy the resulting ciphertext or recovered plaintext.
- Share the key with your recipient over a secure channel, never alongside the ciphertext.
Frequently asked questions
Is encoding the same as encryption?
No. Encoding (such as Base64 or URL encoding) is reversible by anyone and provides no secrecy. Encryption requires a secret key, and without that key the original text cannot be recovered, which is what gives it confidentiality.
What does symmetric encryption mean here?
It means the same key encrypts and decrypts the text. Both sides must hold the identical secret key, so the key has to be exchanged securely and kept private.
Is my text or key uploaded anywhere?
No. Encryption and decryption happen entirely in your browser, so your plaintext, ciphertext, and key stay on your device.
What happens if I lose or mistype the key?
With correct symmetric encryption, the ciphertext cannot be decrypted without the exact key. If the key is lost or wrong, the original text is effectively unrecoverable.