Image Watermark Adder
Add a text or logo watermark to an image up to 200MB, with full control over position, rotation, size, and opacity.
Drag & drop a file here, or click to browse
The image you want to watermark
How to use this tool
Upload the image, type your text or upload a logo, and pick one of nine positions, or Custom to drag the mark anywhere on the preview. Adjust size, opacity and rotation, then download. A JPG photo is saved as a JPG; PNGs and other formats are saved as PNG, which keeps transparency.
How the settings translate into pixels
- Size is a share of the image's width. Text at the default 5% on a 1200-pixel-wide photo is set at 60 pixels; a logo is drawn four times as wide as that setting, 20% of the width at 5%.
- Text is white with a thin dark outline, so it stays readable on both sky and shadow without you choosing a colour.
- Corner positions keep a margin of 4% of the shorter side plus 10 pixels, so the mark never touches the edge of the picture.
- Opacity runs from 10% to 100% and starts at 60%.
Placement that is hard to remove
A small mark in a corner is removed by cropping a few percent off the picture. For product photos or proofs you send before payment, place the mark in the centre, rotate it by about −30° so it crosses the subject, and set the opacity around 30% to 40%, where it is obvious without hiding the picture. Keep your original file: the watermark is drawn into the pixels and can't be taken off the downloaded copy.
Frequently Asked Questions
Why is watermark size set as a percentage instead of a fixed pixel value?
A percentage scales relative to the source image's own width, so the same Size setting produces a proportionally similar-looking watermark whether you're watermarking a small web thumbnail or a large full-resolution photo. A fixed pixel size would look tiny on a huge image and oversized on a small one.
Will the watermark survive if someone crops or edits the image?
Not reliably — a watermark added here is just pixels baked into the image, so cropping it out, covering it, or using photo-editing software to paint over it is entirely possible for someone determined to remove it. Positioning it across a busy or central part of the image makes it harder to crop away cleanly, but no browser-based or pixel-level watermark is truly tamper-proof.
What kind of logo file works best?
A PNG with a transparent background. A JPG logo brings its white or coloured box with it, which shows as a rectangle over the photo. Use a logo at least as wide as it will appear: at the default size on a 4000-pixel-wide photo it is drawn 800 pixels wide, and a smaller logo would be enlarged and look soft.
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