Decrypt AES-256 encrypted text or decode Base64 strings — entirely in your browser.
The Text Decrypter reverses the encryption performed by our Text Encrypter tool. Paste your AES-256-GCM encrypted ciphertext along with the secret key you used when encrypting, and retrieve the original plain text instantly. You can also decode any Base64-encoded string back to its original form. All operations run entirely in your browser — no data is ever transmitted.
Decrypt messages or notes that were encrypted using the Text Encrypter tool with a shared secret key.
Decrypt sensitive notes, passwords, or keys that you previously encrypted before storing in documents.
Decode Base64-encoded strings found in API responses, config files, or data exports back to plain text.
Decode Base64 tokens, JWT payloads (header/payload), or encoded configuration values during development.
AES-256-GCM encryption is designed to be unbreakable without the correct key. If you lose your secret key, the encrypted data cannot be recovered — by anyone. Always store your keys securely.
The AES decryption mode is designed to work with ciphertext produced by our Text Encrypter tool using the same AES-256-GCM format. It may not be compatible with ciphertext from other tools that use different encryption parameters or formats.
Yes. All decryption and decoding runs entirely in your browser using the Web Crypto API. Your ciphertext, key, and decrypted output are never sent to any server.
Completely free with no account required.