Hide Secret Data Inside Images

A free browser-based steganography tool that hides secret data inside images using LSB (Least Significant Bit) encoding. Supports text messages, files, and image-in-image hiding. Optional AES-256-GCM encryption with password protection. Real-time capacity calculator and detectability analysis.

How to Hide Data in an Image

Upload a carrier image

Choose a PNG, BMP, or JPEG image. Larger images can hold more hidden data.

Enter your secret data

Type a text message, select a file, or choose a secret image to hide inside the carrier.

Optionally encrypt

Enable encryption and set a password. Data will be AES-256 encrypted before embedding.

Download the stego image

Click "Hide Data in Image". Download the result as PNG. Share it — only someone with this tool and your password can extract the hidden data.

Embed secret messages, files, and images inside pictures with military-grade encryption

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Carrier Image

Drop an image here or click to browse

PNG, BMP, JPEG, WebP · tools/steganography.batch_hint

Data to hide

0 characters

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Drop a file to hide

Any file type (PDF, ZIP, DOC, etc.)

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Drop a secret image to hide

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Extract

Drop an image here or click to browse

Features

Hide text, files, or images inside any picture — changes are invisible to the human eye AES-256-GCM encryption with PBKDF2 key derivation — password-protect your hidden data Real-time capacity calculator and detectability analysis (Safe / Caution / Risky) Runs in your browser via Canvas — no installation

FAQ

What is steganography?

Steganography is the practice of hiding secret information inside ordinary-looking media files. Unlike encryption (which makes data unreadable), steganography hides the existence of the data itself.

Can anyone see the hidden data?

No. The changes to the image are invisible to the human eye — only the least significant bit of each pixel is modified, which changes color values by less than 0.4%.

How much data can I hide?

It depends on image size. A 1920x1080 image can hold about 790 KB. The tool shows a real-time capacity calculator as you type or select files.

Is the hidden data encrypted?

Optionally. You can enable AES-256-GCM encryption with a password. Without encryption, anyone with a steganography tool could extract the data.

Does it work with JPEG?

You can use JPEG as input, but the output is always PNG (lossless). JPEG compression would destroy the hidden data because it changes pixel values.

Can hidden data be detected?

The tool shows a detectability indicator. Small payloads (<10% capacity) are virtually undetectable. Larger payloads may be detected by advanced steganalysis software.

💡 Want us to improve this tool just for you?

We can — and it's free! Just send us a quick message with your idea. If you'd like to discuss it in detail, leave your email and we'll get back to you. You can stay anonymous.

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Who is this tool for?

🔒 Security & Privacy

Published 06 Apr 2026 Updated 21 May 2026