UtilixVerse
Local File Decryption
↑↓ navigate↵ open
ESC close
Back to Privacy & Encryption
Toolprivacy

Local File Decryption

Decrypt .uv encrypted files locally with the same password — no server involvement and no key escrow, so the file only ever exists on your device.

Works Offline100% Free

Processed 100% locally in your browserPrivate & Safe

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

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

Decrypt a File

Drop the .enc file here or click to browse

Encrypted with the Local File Encryption tool (UVE1 or UVE2 format) — decrypted locally, never uploaded.

The key is re-derived locally via PBKDF2-SHA-256 (600,000 iterations). The password never leaves this page.

Select a UVE encrypted file and enter the password to decrypt it locally.

Free Local File Decryption — Open UVE1 AES-256-GCM Files in Your Browser

Welcome to the UtilixVerse Local File Decryption tool — the companion to the Local File Encryption tool. Select a .enc file, enter the password it was locked with, and download the original file back. Everything runs 100% in your browser via the Web Crypto API — no servers, no uploads, no logs.

Authenticated & Safe

Files encrypted with this site's suite carry an authentication tag. Before this tool hands back any data it verifies that tag, so a corrupted or tampered file is rejected with a clear warning rather than silently producing broken output. The key is re-derived with PBKDF2-HMAC-SHA256 at 600,000 iterations from the password plus the salt stored inside the file.

Your Data Never Leaves Your Device

The encrypted file is read into memory locally, decrypted with hardware-accelerated Web Crypto, and delivered as a download — the same way it would work on a completely offline machine. That means there is no way for a server to see your password or your plaintext, which is the entire point of decrypting locally.

How to Use It

Drop the .enc file onto the tool, type the password, and press Decrypt & Download. The original filename (minus the .enc extension) is restored automatically. If a file was encrypted elsewhere but follows the standard AES-256-GCM + PBKDF2 envelope, you can still decrypt it as long as you know the parameters.

Frequently Asked Questions About Local File Decryption

Which files can this tool decrypt?

Any file produced by the Local File Encryption tool on this site — an AES-256-GCM envelope that begins with the "UVE1" magic bytes and stores a random salt, IV, and ciphertext. The tool validates the magic and version up front and rejects anything else with a clear error message.

What happens if I enter the wrong password?

AES-GCM is an authenticated cipher, so decryption with the wrong password fails the authentication check. Instead of returning corrupted data, the tool reports "Decryption failed — wrong password or corrupted data." There is no way to recover the file without the correct password.

Is my file or password uploaded anywhere?

No. The file is read with the browser File API and the password is used only to derive the key locally via the Web Crypto API. Nothing is uploaded, transmitted, or stored, and the tool works offline once the page has loaded.

Will my original filename be restored?

Yes. Files encrypted with the companion tool are named "something.enc". This tool strips the ".enc" suffix and downloads the decrypted file under its original name (e.g. "report.pdf.enc" decrypts back to "report.pdf"). The content type is returned as a generic binary stream, so your operating system may need to associate the extension with the right app.

Can I detect if the file was tampered with?

Yes — and automatically. GCM computes an authentication tag that this tool verifies before returning the plaintext. If any byte of the encrypted file was modified, corrupted, or truncated, decryption fails and you are warned instead of receiving a silently corrupted file.

Why is decryption slow on some files?

The key derivation (PBKDF2 at 600,000 iterations) runs once per decryption and takes a second or two by design — that cost is what makes brute-forcing passwords impractical. Very large files also take time to read into memory and decrypt; a progress-friendly spinner is shown while it runs.

Is this file decryption tool free and private?

Yes — completely free, no registration, and fully private. All decryption runs locally in your browser; there is no server component, no logging, and no way for anyone else to see the file or the password.

Keep UtilixVerse Free

One-time contribution for hosting & new tools

Donate

Missing a Tool? Request It

Suggest new utilities or report bugs

Request Tool