Add a text or logo watermark to many photos at once. On your device.
Choose Text to type a name or a line such as a copyright notice, up to 60 characters. Pick one of six system fonts, a colour, bold, and an optional outline. The outline helps a white mark stay readable over a bright sky. Choose Image to use your own logo instead. The logo can be a PNG or a WebP up to 10 MB, and its transparent areas stay transparent. The logo is read by this tab and is not saved: when you come back, the other settings are still there, but you choose the logo again. A preview of your first photo updates as you change anything, and Previous and Next step through the others, so you can check a dark photo and a bright one before you commit. This tool adds one mark per photo. It cannot place a mark by hand on each picture, rotate a single mark, or load a font from your computer.
In Position mode the mark sits in one of nine places: the four corners, the four edge centres, or the middle. The margin keeps it off the edge and is a share of the photo's width, so it scales with the picture. Tile mode repeats the mark across the whole photo in staggered rows, turned by an angle you choose. The default is minus 30 degrees, a diagonal that is harder to crop out than a corner mark. Spacing sets the gap between copies as a share of the mark's size, from touching at 0 percent to three marks apart at 300 percent. At 0 degrees the rows run straight across, and at 90 degrees they run top to bottom. Tiles cover the whole picture, so a tiled photo is less pleasant to look at. Use it when protection matters more than looks.
A mark that is 200 pixels wide is huge on an 800 pixel web image and tiny on a 4000 pixel camera original. So every size here is a share of each photo's own width. A text mark set to 5 percent has a font about 200 pixels tall on a 4000 by 3000 photo, about 54 pixels on a 1080 by 1920 portrait and 40 pixels on an 800 by 600 image. The mark takes the same proportion of each picture, so a mixed batch of landscape and portrait photos looks consistent. A logo is limited in height too: it is never taller than half of the photo. The smallest text size is 8 pixels, so on a very small image the mark can end up larger than the percentage suggests. If your text is wider than the photo, the preview tells you, and the mark is cut off at the edge.
Opacity starts at 40 percent. At that level a white mark over a black area comes out dark grey, visible but not loud. Raise it for photos with busy detail and lower it when the mark covers a face. White text with a dark outline is readable on most backgrounds. Black text with no outline disappears on a dark photo. The output keeps each photo's format: JPEG stays JPEG at quality 92 out of 100, PNG stays PNG and WebP stays WebP, though a browser that cannot save WebP will say so. Each file is drawn fresh from its pixels, so camera and location data in the original is not carried into the copy. A watermark in the pixels is not tamper-proof. A skilled editor can remove it, and this tool does not add an invisible mark.
Yes, up to 50 photos per batch, as JPEG, PNG or WebP. They are processed one at a time, and Download all (.zip) gives you every copy named like holiday-watermarked.jpg. A very large batch may pause and ask you to download what is finished before it carries on.
No. The logo is a PNG or WebP file that your browser reads in this tab and draws onto your photos. No server receives it. It is also not saved between visits: your text and positions are remembered, but you choose the logo again.
Sizes are a percentage of each photo's width, not a fixed number of pixels. A 5 percent text mark is about 200 pixels tall on a 4000 by 3000 photo and about 40 on an 800 by 600 one, so it fills the same share of each picture.
Each photo is drawn again and saved in its own format. PNG is lossless. JPEG and WebP are saved at quality 92 out of 100, which is a fresh lossy save, so the file can differ slightly in size from the original.
Not with this tool, and not from the copies it makes: the mark is part of the pixels. Keep your originals. The download is a separate file with -watermarked in its name, and your original file is never changed.
The preview shows the mark cut off and says it is wider than the photo. Lower the size, shorten the text, or switch to a logo. A text mark at 30 percent of the width can still run off a photo if the text has many characters.