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.
Embed secret messages, files, and images inside pictures with military-grade encryption
Carrier Image
Drop an image here or click to browse
PNG, BMP, JPEG, WebP · tools/steganography.batch_hint
Drop a file to hide
Any file type (PDF, ZIP, DOC, etc.)
Drop a secret image to hide
Extract
Drop an image here or click to browse
Features
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.
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.
Is my image uploaded to a server?
No. All processing happens in your browser using the Canvas API and Web Crypto API. Your images and messages never leave your device.
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.
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.
