AES Encryption / Decryption
Encrypt and decrypt text with AES-GCM
AES Encryption / Decryption is a free online tool from BrowserUtils that encrypt and decrypt text with aes-gcm. It runs entirely in your browser — your data never leaves your device. No account required.
Mode:
How to use AES Encryption / Decryption
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About AES Encryption / Decryption
Free online AES encryption and decryption tool. Securely encrypt text with a password using AES-GCM via the Web Crypto API, entirely in your browser. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
AES Encryption / Decryption specs
- Runtime
- 100% client-side (browser)
- Built on
- Web Crypto API (SubtleCrypto) for hashing and crypto.getRandomValues for secure randomness
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
What encryption algorithm is used?
This tool uses AES-GCM (Galois/Counter Mode) with a 256-bit key derived from your password via PBKDF2. AES-GCM provides both confidentiality and authenticity.
Is my data sent to a server?
No. All encryption and decryption happens entirely in your browser using the Web Crypto API. Your data and password never leave your device.
What is AES-GCM and why is it recommended?
AES-GCM is an authenticated encryption mode that provides both confidentiality and integrity checking. It detects if encrypted data has been tampered with, unlike basic AES-CBC which only provides confidentiality.
Can I decrypt data encrypted with a different tool?
Only if the other tool uses the same algorithm (AES-256-GCM), key derivation method (PBKDF2), and encoding format. Different tools may use different parameters, making cross-tool decryption unreliable.
How strong is AES-256 encryption?
AES-256 is considered unbreakable with current technology. It would take billions of years for the fastest supercomputers to brute-force a 256-bit key. The strength of your encrypted data depends primarily on the password you choose.
Can I encrypt a message to share with someone else?
Yes, encrypt your message with a password and share the encrypted output. The recipient can decrypt it using the same password on this same tool. Share the password through a separate secure channel.
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