Image Watermark Tool – Add Text or Logo Watermarks to Photos
About the Image Watermark Tool
The Image Watermark Tool stamps a copyright line, business name, or logo onto a photo so the image carries its attribution wherever it travels. You get two watermark types. Text mode takes any string you type and renders it in bold with a drop shadow behind it, which is what keeps white text readable over a bright sky or a pale background. Image mode takes a logo file you upload and scales it as a percentage of the photo’s width, preserving its aspect ratio.
Placement and appearance are controlled by four inputs that update the preview instantly. A nine-cell position grid puts the watermark in any corner, edge center, or the middle of the frame. Opacity runs from 10% to 100%, rotation covers a full -180° to +180° sweep for diagonal stamps across the image, and a margin slider sets the distance from the edge for the eight non-center positions. The canvas preview renders at your image’s real dimensions, so what you see is exactly what downloads.
The practical tension in watermarking is visibility against intrusiveness. A faint 20% watermark in a corner is easy to crop out; a heavy diagonal one across the center is nearly impossible to remove but also ruins the photo for legitimate viewers. Photographers sharing proofs typically go bold and central, while businesses posting finished marketing images use a corner mark at 40% to 60% opacity. Neither approach makes an image theft-proof, but both make casual reuse traceable back to you.
Text watermarks look most professional when the color matches your brand rather than defaulting to plain white, and the Image Color Picker pulls the exact hex value from a logo so you can paste it straight into the color field.
The people who build BigToolSite’s tools ran this against portrait and landscape photos at every position, checked that rotation pivots around the watermark’s own center rather than the image corner, confirmed that transparent PNG logos keep their transparency when composited, and verified that the exported file matches the on-screen preview at full resolution.
Working at full camera resolution makes the watermark look tiny relative to the frame, so scaling the photo down first often gives a better result, and the Image Resizer handles that before you start.
Output is written as PNG, which is lossless and therefore large for photographs, so running the finished file through the Image Compressor is worth the extra step before uploading anywhere.
How to Use the Image Watermark Tool
- Load your photo with Upload Image (JPG, PNG, or WebP up to 10MB) or paste a direct link under Load from URL.
- Pick a Watermark Type. Text is selected by default.
- For text, type into the Watermark Text box. Set Font Size between 12px and 120px, and click the Font Color swatch to choose a color. A drop shadow is added automatically for contrast.
- For an image watermark, click Upload Watermark Image and choose a logo file, ideally a PNG with a transparent background. Then set Watermark Size from 5% to 100% of the photo’s width.
- Choose a Position from the nine-cell grid. TL, TC, and TR are the top row; ML, C, and MR the middle; BL, BC, and BR the bottom.
- Drag Opacity to set how strongly the watermark shows through. 50% is the default and a reasonable starting point.
- Use Rotation for angled watermarks. Around -45° gives the classic diagonal stamp across a centered watermark.
- Adjust Margin to control the gap between the watermark and the image edge. This has no effect when the position is set to center.
- Click Download to save the result. The file is named after your original with a “watermarked-” prefix.
- Click New Image to clear the canvas and start over with a different photo.
Example Usage
Goal: a discreet copyright line for a portfolio photo
Settings: Text mode, “© Studio Name 2026”, Font Size 36px, Font Color #FFFFFF, Position BR, Opacity 60%, Rotation 0°, Margin 30px
Result: a clean bottom-right credit that reads clearly without competing with the subject
For proofs sent to a client before payment, the goal is the opposite. Set Position to C, Font Size to 100px, Rotation to -45°, and Opacity to 35%. That produces a large diagonal “PROOF” across the middle of the frame, visible enough to discourage use but transparent enough that the client can still evaluate the image.
For a logo watermark, switch to Image mode and upload a transparent PNG. Set Watermark Size to 15% and Position to TR at 70% opacity. Because size is measured against the photo’s width, the same 15% setting keeps your logo proportionally consistent across images of different resolutions, which matters when you are watermarking a whole set.
One thing to watch: the font size is measured in the photo’s own pixels, not screen pixels. A 48px watermark on a 4000-pixel-wide camera file is barely a sliver, while the same 48px on an 800-pixel web image is prominent. Adjust the slider by what the preview shows rather than by the number.
Frequently Asked Questions
No. The photo, the logo, and the finished composite are all handled on a canvas element inside your browser, so nothing is transmitted anywhere.
It deters casual reuse and keeps your attribution attached to the image, but it is not technical protection. Watermarks can be cropped or edited out. Copyright exists whether or not you watermark; the mark mainly makes ownership visible and removal a deliberate act.
Between 40% and 60% works for most cases, visible without dominating the photo. Go lower for subtle branding on finished marketing images, and higher for proofs and previews where deterrence is the point.
Bottom-right is the conventional spot for a discreet credit and the one viewers expect. Center placement is much harder to crop away, which is why it suits unpaid proofs and sample work.
Yes. Switch to Image mode and upload your logo. A PNG with a transparent background composites cleanly; a JPG logo will bring its rectangular background along with it.
PNG. It is lossless, so the watermarked image keeps full quality, though the file will be noticeably larger than a JPG. Compressing it afterward is worthwhile for anything going on a website.
Not in this tool. It handles one image at a time so you can position each watermark against that specific composition, which is usually what you want since a corner that works on one photo can cover the subject in another.
It should not, because a drop shadow is drawn behind the text automatically. If it still reads poorly, either raise the opacity, move it to a darker part of the frame, or choose a darker font color.
No. Margin controls the distance from the image edge, so it applies only to the eight positions that sit against an edge or corner.
Yes for the logo you are stamping on. The base photo is exported as a PNG too, so transparency in the underlying image is preserved as well.
