Photo Watermark
Put your name or a note on a photo, in a corner or repeated across the whole picture. Everything happens on your machine, so the original never leaves it.
How to use it
- Choose a photo and type the words you want on it.
- Pick one placed mark or a tiled one, then adjust size, opacity and angle until it is visible without ruining the picture.
- Download it. The preview is exactly what you get.
What a watermark can and cannot do
Be realistic about it. A watermark stops the casual copy — someone who would otherwise repost your photo with no credit — and it tells honest people who to ask. It does not stop a determined person.
A small mark in a corner takes a few seconds to crop out. A mark across the middle takes longer to remove and spoils the picture for you as well, which is the trade. If the picture really is worth stealing, tile it: a mark repeated across the whole image cannot be cropped away, and removing it needs real editing skill. The cost is that it is unpleasant to look at, which is rather the point.
Legibility is the actual problem
White text vanishes on a bright sky and black text vanishes in shadow. The soft shadow option puts a faint dark halo behind every letter, so the mark reads on either, and it is on by default for that reason. Around half opacity is a good place to start: solid enough to be seen, transparent enough to leave the picture usable.
Size is set as a percentage of the picture's width rather than in pixels, so the same setting looks the same on a phone snapshot and on a 40-megapixel original.
The metadata is not carried across
The watermarked copy is drawn fresh, so the hidden details of the original — camera, date, location — do not come with it. That is usually welcome before posting a photograph publicly. But it also means that a copyright note stored in the original's metadata is gone, so the visible mark is doing all the work.
PNG or JPG
PNG keeps every pixel exactly and makes a bigger file. JPG is smaller and loses a little detail with every save, which shows soonest around the edges of text. Use PNG for anything you might edit again.
Frequently asked questions
Can someone remove the watermark?
Yes, if they try hard enough. A small corner mark can be cropped in seconds. A mark repeated across the whole picture is far harder to remove, and it is the setting to choose if the photo is valuable. Treat a watermark as a deterrent and a credit, not a lock.
Is my photo uploaded?
No. The photo is drawn onto a canvas in your own browser and the result is handed straight back. The original never leaves your machine.
Does it work with non-English text?
Yes, provided your device has a font that includes those letters, which nearly every modern phone and computer does. The text is drawn by your browser with its own fonts, so what you see in the preview is what you get.
Why is the result a different size from my original?
It should not be - the output is exactly the same width and height. The file size will differ, especially if you switched from JPG to PNG, because the two formats store pictures differently.
Will it keep the photo's location and camera details?
No. The copy is drawn fresh and none of the hidden metadata is carried over. That is usually helpful before sharing publicly, but a copyright note stored in the original's metadata will not survive.
Is my text sent anywhere?
No. Everything happens in JavaScript inside your own browser. Nothing is uploaded and nothing is saved - close the tab and it is gone.