A free online tool to encrypt and decrypt images securely. Protect your images with advanced and authenticated encryption techniques.
This tool encrypts and decrypts any image instantly for free. It supports encryption
of all image formats such as .png, .jpeg, .jpg, .gif, etc. This image can be encrypted with
a user supplied secret key or without it, but it is
always recommended to supply a custom secret key
while encrypting the image for an utmost security.
All Image Formats Supports .png, .jpg, .jpeg, .gif, .webp and all common raster formats up to 20 MB.
AES-256-GCM Security Military-grade authenticated encryption — confidentiality and tamper detection in one pass.
No Sign-up Required Free to use, no account or login needed
🔒 Encrypt Image Online
After encryption, download the .enc file or copy Base64.
Encrypted image ready — KB
🔓 Decrypt Image Online
If decryption fails, the passkey may be incorrect or file
corrupted.
We do not store, log any key you enter.
This tool is intended for personal and educational use.
We suggest not to use online tools to protect real production secrets.
How to Use This Tool
1
Upload your image — click the file picker in the Encrypt panel and select any image (PNG, JPG, GIF, WebP, up to 20 MB).
2
Optionally set a secret passkey — check Encrypt with a secret key and enter a passphrase. Without one, a random key is used automatically.
3
Click Encrypt — download the .enc file or copy the Base64 output to store or share the encrypted image.
4
To decrypt — upload the .enc file in the Decrypt panel, enter the same passkey used during encryption, and download the restored image.
Why AES-256-GCM?
AES
(Advanced Encryption Standard) is a symmetric key encryption algorithm widely
trusted for securing sensitive data. AES-256-GCM combines:
256-bit Key Strength
Maximum cryptographic resistance — currently infeasible to crack even with modern supercomputers.
Galois/Counter Mode (GCM)
Combines encryption with a built-in authentication tag so any tampering is immediately detected on decryption.
No Padding Required
GCM is a stream-mode cipher — no block padding means no padding oracle or PKCS#7 side-channel vulnerabilities.
Random IV & Salt
A fresh Initialization Vector and salt are generated per encryption, so identical images always produce different ciphertext.
This combination makes AES-256-GCM ideal for encrypting images, where both secrecy
and authenticity are critical.
How Our Online Tool Works
Our tool provides a simple interface for encrypting and decrypting images:
1
Image Upload & Key Derivation — your image bytes are read in-browser. If a passkey is supplied, PBKDF2 derives a 256-bit AES key from it along with a random salt; otherwise a secure random key is generated.
2
AES-256-GCM Encryption — a cryptographically random 12-byte IV is created. The Web Crypto API encrypts the image data and produces a 16-byte GCM authentication tag that detects any modification.
3
Packaged as .enc File — the salt, IV, auth tag, and ciphertext are bundled into a single .enc file. This file contains everything needed to decrypt, except the passkey.
4
Preview & Base64 Output — both encrypted and decrypted images can be previewed instantly in your browser. You can also copy the Base64 string for embedding or storage.
⚠️ Your passkey is never stored — keep it safe
The secret key is not stored anywhere on our platform. If you lose it, the encrypted file cannot be recovered. Store your passphrase in a password manager or secure vault before encrypting important images.
AES-256-GCM for Image Encryption
Images often contain sensitive data, whether personal photos or business documents.
Simple encryption methods like AES-CBC or DES may protect confidentiality but fail
to detect tampering. AES-256-GCM provides:
Unbreakable Encryption AES-256 is computationally infeasible to crack with brute force using any modern hardware.
Data Integrity GCM authentication tag ensures corrupted or tampered .enc files are rejected on decryption.
No Padding Attacks GCM requires no block padding, preventing padding oracle and PKCS#7 side-channel exploits.
Pixel Pattern Hiding Unlike ECB mode, GCM produces output that reveals no visual pattern from the original image.
Fast In-Browser Uses the native Web Crypto API for hardware-accelerated encryption with no software overhead.
No Technical Expertise Needed Upload, click Encrypt, download — professional-grade security with a one-click workflow.
With our online tool, even non-technical users can safely encrypt and decrypt images
with professional-grade cryptography.
Is PGP encryption suitable for encrypting images?
PGP
encryption can technically be used to encrypt image files because it works on
raw file data,
not just text. This means you can securely encrypt photos, screenshots, or any image
file using a PGP
public key or passphrase. However, while PGP provides strong security,
it is not very user-friendly for most people and requires key management,
command-line tools,
or special software to decrypt the image later. For simple use cases like protecting
personal photos or
sharing images securely online, password-based encryption (such as AES) is usually
more convenient and practical,
whereas PGP is better suited for advanced users who already use PGP for secure
communication and file exchange.
Frequently Asked Questions
The tool supports all standard raster image formats including .png, .jpg, .jpeg, .gif, .webp, .bmp, and .svg. Any file the browser can read as an image is supported, up to a maximum size of 20 MB.
No. All encryption and decryption is performed entirely in your browser using the Web Crypto API. Your image data, passkey, and output never leave your device or touch any server.
The passkey is never stored anywhere. If you lose it, the encrypted file cannot be recovered. Always save your passphrase in a password manager before encrypting important images.
Only if the other tool uses the same file format (salt + IV + ciphertext packed into a .enc file) and the same key-derivation method (PBKDF2 + SHA-256). Generic AES-256-GCM ciphertext from other tools is not directly compatible because the bundled metadata layout may differ.
Without a passkey, a random AES-256 key is generated and embedded in the .enc file alongside the ciphertext. Anyone who obtains the .enc file can decrypt it. With a passkey, the file remains secure even if intercepted — only someone who knows the passphrase can decrypt it.
For simple password-based image protection, AES-256-GCM is more practical — it requires no key pair management and is easier to use for non-technical users. PGP is better suited when you need asymmetric encryption (encrypt for a recipient using their public key) or integration with existing PGP workflows.
