AES Encrypt / Decrypt
Encrypt and decrypt text with AES.
AES symmetric encryption protects sensitive text with a shared passphrase - useful for sharing secrets through insecure channels, learning cryptography, and testing encryption workflows. Utilitoo's AES Encrypt/Decrypt tool uses AES-256-GCM with PBKDF2 key derivation and a random salt and IV for each encryption.
Developers prototyping encrypted storage, security students learning symmetric encryption, and teams sharing credentials through chat all need a quick AES tool without installing OpenSSL. Encrypt with a strong passphrase and share both the ciphertext and passphrase through separate channels.
Enter text and a passphrase, then click Encrypt to get base64-encoded output. Switch to decrypt mode, paste the ciphertext and passphrase, and recover the original text. Pair with RSA Encrypt/Decrypt for asymmetric workflows or Hash Checker for integrity verification.
All encryption runs locally in your browser on Utilitoo using the Web Crypto API. Your plaintext, passphrases, and ciphertext are never uploaded. Free for learning and testing - use strong passphrases and audit for production use.
AES Encrypt / Decrypt is a browser sandbox for aes encrypt decrypt demos and fixtures. Encrypt and decrypt text with AES. Treat output as sensitive once you paste it into real systems, even though Utilitoo never uploads it.
Common use cases
- Encrypt and decrypt text with AES during local development when a hardware token or HSM is not available.
- Demonstrating aes encrypt decrypt concepts to junior engineers with safe sample inputs.
- Verifying checksums or tokens from vendor docs before integrating an SDK.
- Auditing whether a candidate secret looks strong enough before storing it.
- Rotating practice keys after experiments so training material stays disposable.
Tips & common mistakes
Encrypt and decrypt text with AES. Prefer test keys while experimenting, and clear the field when you finish. Pair hash tools with Hash Checker when comparing digests from two sources. Treat Utilitoo as a convenience layer, not a replacement for HSMs or audited key management.
Common errors
- Unexpected AES Encrypt / Decrypt output - confirm encoding (hex vs base64 vs utf-8) and algorithm options match the other system.
- Copied trailing whitespace or line breaks from chat apps can change digests and comparisons - trim before verifying.
How to use
- Enter text and passphrase.
- Encrypt or decrypt.
Frequently Asked Questions
Which AES mode does Utilitoo use?▼
AES-256-GCM with a random 12-byte IV and PBKDF2 key derivation from your passphrase.
Is my passphrase stored?▼
No. Passphrases exist only in your browser session and are never sent to any server.
Can I decrypt on a different device?▼
Yes. Use the same passphrase and ciphertext. The salt and IV are embedded in the output.
Is this safe for production secrets?▼
It uses standard Web Crypto APIs. For production, audit your workflow and use strong passphrases.
Is my data uploaded during encryption?▼
No. All operations run locally in your browser on Utilitoo.
Related Tools
RSA Encrypt / Decrypt
RSA public/private key encryption.
SHA256 Generator
Generate SHA-256 hashes from text.
Hash Checker
Verify text against a known hash.
Password Generator
Generate strong random passwords.
Token Generator
Generate secure API tokens and secrets.
Secure Random Generator
Generate cryptographically secure random values.