SignetDrop watermarks a folder of photos without uploading them
Drop the pictures in, set the mark once, and take one ZIP away. The work happens inside this page — the photos are never sent anywhere, so there is nothing to delete afterwards and nothing to trust us about.
1. Photos
No photos yetDrop photos here
JPEG, PNG, WebP and — where the browser can read them — HEIC.
Nothing is uploaded. You can watch the Network tab while you use this.
3. Run
Paid version — $29 once
Free
- 10 photos at a time
- Up to 2048px on the longest edge
- A text watermark or a logo
- Resize, format, numbering and suffixes
- No name of ours on your photos, ever
Paid — $29, one payment
- Any number of photos, at any size
- Text and logo together
- Saved presets
- Name templates like
{date}_{n}_{name} - Padding and 1:1 / 4:5 / 16:9 canvases
- Keep EXIF, if you want it kept (JPEG to JPEG)
One payment. A year of updates; the version you have keeps working after that.
How it works
Everything runs in the page. When you drop photos in, the browser decodes them one at a time, draws each onto a canvas with the watermark you set, re-encodes it, and puts the result into a ZIP that is built in memory. The ZIP is handed to you as a download from your own machine. No server sees the pictures because no server is involved.
Which way up
Phone photos are usually stored sideways with a tag saying which way to turn them. SignetDrop reads that tag itself and applies it, rather than trusting the browser to, because browsers disagree about the default. So the output is upright and the watermark is in the corner you chose.
What happens to EXIF
By default, none of it survives. Output is drawn onto a canvas and re-encoded, and a canvas has nothing to say about where a photo was taken or what took it — no GPS, no camera serial, no timestamps. That is a consequence of how the tool works rather than a filter that might miss something. The one thing browsers do attach is a colour profile, which describes how the colours should be read and nothing about you. The paid version can carry the original EXIF across for JPEG output if you ask it to.
What a watermark is and is not
A visible watermark tells an honest person where a picture came from. It does not stop a determined one: it can be cropped, painted over, or removed by software made for the purpose. If a photo would cause you real harm if it were taken, a watermark is not the protection you need. We would rather say so than sell you a feeling.
Questions
Are my photos uploaded?
No, and you can check rather than take our word for it: open the developer tools, switch to the Network tab, and run a batch. The only requests are this page's own files and — if analytics is switched on — a counter that carries how a batch ended, how many photos were in it, and which format. Privacy lists them.
Is there a limit on file size?
Not one we impose. The practical limit is your machine's memory, and photos are handled one at a time to keep that as low as it can be. Very large batches take a while; the page tells you where it is and you can stop it.
Why is HEIC sometimes refused?
HEIC can only be decoded by browsers that ship a decoder — Safari does. Where the browser cannot read it, SignetDrop says so and names the file rather than quietly producing nothing.
What does the paid version check?
A licence key with a signature on it. The check happens in your browser and never touches the network, so it works offline and keeps working if our licence service is down. Once a month, if you are online, the page asks whether the key has been refunded.