UNDERLAYER Hide Data in Plain Sight.
Your files are processed locally in your browser whenever possible. Carrier images and payloads are not uploaded to the server for encoding or decoding.

Decode

Inspect a suspected stego image and extract Underlayer payloads. Analysis runs locally in your browser.

Stego Image

Drag stego image here

or click to browse — PNG recommended

Image Analysis

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Underlayer Status

Awaiting image

Load a PNG to inspect for an Underlayer container.

Decoder scans RGB LSBs for the Underlayer magic signature and verifies integrity with SHA-256.