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AES Text Decryption
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AES Text Decryption

Decrypt AES-256-GCM encrypted text. Free AES decryption tool with password-based key derivation.

Works Offline100% Free

Processed 100% locally in your browserPrivate & Safe

AES Text Decryption runs entirely on your device using Web API standards. No data is ever uploaded to UtilixVerse servers.

Your Input
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Browser
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Result
No Server UploadsNo Account RequiredWorks OfflineZero Data Logging

Decrypt Text

Paste an envelope and enter the password, then press Decrypt.

Free AES Text Decryption — Open AES-256-GCM Messages

Welcome to the UtilixVerse AES Text Decryption tool — the companion to the AES Text Encryption tool. Paste a UVE1 envelope (the encrypted output shared by someone who used this site), enter the password, and press Decrypt to reveal the original message. All decryption runs 100% in your browser with the Web Crypto API — your envelope and password never leave your device.

Tamper-Proof by Design

The envelope is verified with AES-256-GCM's 128-bit authentication tag. If anyone modified the ciphertext — even a single character — decryption fails with an error instead of showing corrupted content. Combined with the 600,000-iterationPBKDF2 key derivation, a wrong password also produces a clean failure, so you always know the result you see is exactly what was encrypted.

Private by Default

Because the browser performs the cryptography locally, your password and the decrypted message are never transmitted, logged, or stored. There is no server, so there is nothing to intercept, subpoena, or leak. This is end-to-end encryption at its simplest: you and the sender hold the only keys.

Who Uses This Tool

Anyone who receives an encrypted message from this platform: clients sent credentials by a support team, teammates receiving secrets, journalists decoding protected sources, and individuals recovering their own encrypted notes. No install, no sign-up, and nothing leaves your device.

Frequently Asked Questions About AES Text Decryption

What format does this tool accept?

It accepts the "UVE1" text envelope produced by the AES Text Encryption tool: the prefix UVE1. followed by three base64 fields (salt, initialization vector, and ciphertext) separated by dots. Paste the entire envelope including the UVE1. prefix — the tool validates the structure before attempting decryption.

Why am I getting a decryption failure?

A failure almost always means one of three things: the wrong password, a corrupted or truncated envelope, or content that was encrypted with a different scheme. Because AES-GCM is authenticated, decryption fails loudly rather than producing garbage — a wrong password yields an error, not corrupted-looking text. Double-check the password and make sure the whole envelope was copied.

Is decryption performed locally?

Yes. The envelope, password, and decrypted output are processed entirely in your browser using the Web Crypto API. Nothing is uploaded, logged, or stored anywhere. You can even disconnect from the internet and the tool keeps working, because all cryptography happens on your device.

Does this tool work with other encryption tools?

The envelope format is defined by this site so it is guaranteed to be compatible with the companion AES Text Encryption tool. Under the hood it is standard AES-256-GCM with PBKDF2-HMAC-SHA256 key derivation, so a tool that can parse the salt, IV, and ciphertext fields with the same parameters can also decrypt it.

Is the password sent anywhere?

No. Your password is used only to derive the local decryption key and is discarded when the operation finishes. It is never transmitted, and the tool has no server to receive it. That is also why losing the password means the data cannot be recovered by anyone — including us.

How do I know the decrypted text is genuine?

AES-GCM is an authenticated cipher: it computes a 128-bit authentication tag that is checked during decryption. If the ciphertext was tampered with — even by a single bit — the tag verification fails and the tool reports an error instead of showing you altered content. This proves the message has not been modified since it was encrypted.

Is this AES decryption tool free and private?

Yes — completely free, no registration, and 100% private. All decryption runs locally in your browser using the Web Crypto API; nothing is sent to any server, and the tool works offline after the page loads.

How to Use the AES Text Decryption

Decrypt AES-256-GCM envelopes produced by UtilixVerse's encryption tool. Because the cipher is authenticated, the wrong password is detected and reported — closed envelopes can't be partially misread.

Step-by-Step

  1. 1Paste the full ciphertext envelope.
  2. 2Enter the password that was used to encrypt it.
  3. 3The tool derives the key locally and returns the decrypted text.

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