A tour of the tool
The HILIA tool is a single page with three tabs. Every panel takes an image, does one job, and gives you a downloadable result.
Steganography tab
| Panel | What it does |
|---|---|
| Hide | Weaves a payload file into a carrier image, optionally passcode-locked. |
| Reveal | Recovers the hidden file from a stego image (needs the passcode if one was set). |
| Probe | Answers "does this image appear to hide something?" without extracting it. |
| Capacity | Estimates how much data a given carrier can hold with each method. |
Watermark tab
| Panel | What it does |
|---|---|
| Embed | Hides a short text ID (up to 32 bytes) in the image under your secret key. |
| Extract | Recovers the embedded text ID — needs the same key. |
| Detect | Reports whether a watermark made with your key is present, with a confidence score. |
| Stamp | Embeds an invisible logo mark into the image. |
| Reveal preview | Amplifies a stamped image (adjustable gain) so the hidden stamp becomes visible. |
Tip
Embed and Stamp are the two operations that spend gas. Extract, Detect and Reveal are free.
Visible tab
One panel: overlay text or a logo on an image at any size, angle and opacity — single mark or tiled diagonal repeat. This never uploads your image; the whole thing runs in your browser. See Visible watermark.
Deep links
You can link straight to a tab: /app?tab=steg,
/app?tab=wm, /app?tab=visible.