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Encrypt and Decrypt Image Online for Free

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.

Also, you can use this text encryption and decryption tool to encrypt any text instead of an image.

Encrypt and Decrypt Image

🔒 Encrypt Image
🔓 Decrypt Image
After encryption, you can download the encrypted file (.enc) or copy the base64 blob to share.
preview
No image selected

Encrypted file ready — size: {{vm.encryptedSize | number}} KB

If decryption fails, the passkey is likely incorrect or the file is corrupted.
{{vm.decryptedFileName}}
decrypted
No decrypted image yet

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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.

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 AES key: Provides a high level of cryptographic strength against brute-force attacks.
  • Galois/Counter Mode (GCM): Offers both confidentiality and integrity. Unlike simple AES modes (like CBC), GCM ensures that encrypted data has not been tampered with.
  • NoPadding: With GCM, padding is not required, which simplifies encryption and prevents padding-related vulnerabilities.

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. Encrypt Images: Upload your image and optionally provide a secret key. The supplied key is used to encrypt the image. The tool automatically generates a random Initialization Vector (IV) and salt for added security.
  2. Download Encrypted File: The encrypted output is packaged as a .enc file for seamless decryption later.
  3. Decrypt Images: Upload your encrypted file (.enc) and supply the same secret key used during encryption. The tool reconstructs the original image safely.
  4. Preview & Copy Base64: Both encrypted and decrypted images can be previewed instantly. You can also copy the Base64 representation for sharing or storage.

The secret key provided during the encryption is nowhere stored on our platform and hence, if the encryption key is lost, then the file can never be decrypted back and hence the user need to make sure that secret key or the pass phrase is stored in a safe manner.

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:

  • Strong Encryption: AES-256 is currently unbreakable with brute-force attacks using modern computing.
  • Data Integrity: GCM mode ensures that corrupted or modified encrypted files cannot be decrypted successfully.
  • No Padding Vulnerabilities: Using NoPadding with GCM prevents common attacks related to padding schemes.

With our online tool, even non-technical users can safely encrypt and decrypt images with professional-grade cryptography.

Try our AES-256-GCM Image Encryptor today — secure your images with advanced encryption, optional secret keys, and instant previews. Ideal for personal, professional, and enterprise-level needs.

References

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