Encrypt / Decrypt Text
What is an Encrypt / Decrypt Text?
Encrypt plain text strings into secure ciphertext and decrypt ciphertext back to plain text using strong symmetric encryption algorithms: AES-256 (CBC/GCM), TripleDES, Rabbit, and RC4.
Why Use This Tool?
- Secure Message Sharing: Encrypt sensitive notes, credentials, or API keys with a secret passphrase before sharing over unencrypted channels.
- Data At Rest Security: Encrypt text locally before saving to cloud storage or text files.
- Crypto Algorithm Testing: Test symmetric key encryption and decryption implementations.
How to Use
- Select Action: "Encrypt" or "Decrypt".
- Select Algorithm (AES-256 recommended) and enter Secret Passphrase.
- Paste input text and copy encrypted Base64 ciphertext or decrypted plain text.
Real Working Example
Input:
Plain Text: "Confidential Data 2026" | Secret Key: "MySecretPassphrase123!" | Algorithm: AES-256
Output Result:
Encrypted Ciphertext (Base64): U2FsdGVkX19x8vZ7N9g5K8L3Q1w2e3r4t5y6u7i8o9p0=
Important Technical Details & Security Standards
- CryptoJS / Web Crypto Engine: Uses AES-256 cipher block chaining (CBC) or GCM with PBKDF2 key derivation and random IVs.
- Base64 Ciphertext Output: Formats binary cipher bytes into clean Base64 string output.
- 100% Client-Side Privacy: Passphrases and plaintext stay 100% private in local browser memory.
Related Security & Crypto Tools
- PGP Encryption Tool: Encrypt messages with PGP keys.
- Hash Text: Compute SHA256 and MD5 hashes.
- Base64 Encoder/Decoder: Encode Base64 strings.
Frequently Asked Questions
Is AES-256 encryption safe?
Yes, AES-256 is the U.S. government and global military standard for secure symmetric encryption.
What is the difference between encryption and hashing?
Encryption is two-way (decryption restores original text using a key); Hashing is one-way (irreversible).
What happens if I lose my secret passphrase?
Without the secret passphrase, encrypted ciphertext cannot be decrypted—data cannot be recovered.
Is it free?
Yes, 100% free.
Is my plain text or passphrase uploaded to a server?
No, all encryption and decryption runs 100% locally in your web browser.
Why is Base64 used for ciphertext output?
Base64 encodes binary ciphertext into safe ASCII text characters for easy copying and transmission.