VeilmarkInvisible watermark
Low-contrast, chroma and LSB steganography. Invisible in normal viewing; confirm it in the Reveal tab.
macOS 12+ · Intel & Apple Silicon
Hide a watermark
Hide a watermark
inside your photos.
Invisible at a glance. Reveal it on demand, or read the ID back with blind detection. Batch processing, local records and signed evidence — all on your Mac.
- No network
- Never overwrites
- One-time purchase
Why Veilmark
On-device
No uploads, no account, no telemetry.
Never overwrites
Outputs go to new files; duplicates get a new name.
One-time purchase
No subscription. A capable free tier stays free.
Capabilities
Invisible, until you need proof.
Embed, reveal, verify and keep a local record — a chain you can check yourself.
Robust watermark
DWT-DCT-QIM + BCH; survives JPEG and aligned crops, with bounded rotation and scaling.
Reveal and verify
One-click reveal; blind detection without the original, with a three-state verdict.
Ledger and signed evidence
ID ↔ file ↔ time ↔ recipient; export SHA-256 + Ed25519 signed manifests.
Batch processing
Resize, convert, visible watermark, EXIF orientation; preview matches export.
Metadata
Optional IPTC source type and XMP copyright, off by default. No AI-generated labels.
Workflow
Drop in, process, verify.
Drop in
Drag images or a folder into the queue.
Configure
Pick invisible or robust mode, strength and output.
Process
Write to new files; sources stay untouched.
Verify
Reveal, blind-detect, ledger and signed evidence.
For people who need to prove “this image is mine.”
The free tier is a capable batch tool; Pro unlocks the trust layer.
Photographers
Bind ownership before upload
Find the ID and source again when an image travels.
Commerce
Process product images
Batch resize and convert, with copyright metadata.
Creators
Mark before publishing
Leave a mark you can prove, without relying on a platform.
Teams
Leak-tracing ledger
Unique ID + recipient + signed manifest.
Pricing
Free download. One-time Pro.
No subscription. The free tier is a capable batch tool; Pro unlocks hidden watermarks, verification and the ledger.
Free
$0
No payment required
- Batch resize / convert
- Visible watermark (text / image)
- Live preview (original / result)
- EXIF orientation
- Never overwrites source files
Recommended
Pro
$3.99
One-time purchase · personal use
- Invisible watermark (low-contrast / chroma / stego)
- Robust watermark + blind detection
- Reveal and verify workspace
- Ledger / CSV / JSON / PDF
- SHA-256 + Ed25519 signed evidence
- IPTC / XMP metadata
Purchases are handled by Apsdai; the license key is emailed after payment.
Download
Download for macOS
Try it on your Mac.
macOS 12 (Monterey) or later; universal binary for Intel and Apple Silicon.
FAQ
Is the hidden watermark really invisible?
It is invisible in normal viewing; confirm it in the Reveal tab. It raises the cost of copying and tracing — we do not claim it is impossible to remove.
Which image formats are supported?
JPEG, PNG, HEIC and other common formats; export as JPEG / PNG / HEIC or keep the source format.
Do you upload my images?
No. The app makes no network requests; everything runs on your Mac.
How do I activate after purchase?
Your license key is emailed after payment. Open the app → Settings → Pro → Enter license key → Activate.
Is the free version usable?
Yes. Batch resize, convert, visible watermark and preview are free; hidden watermarks, robust detection, the ledger and metadata are Pro.