What does this image watermark tool do?
An image watermark places visible text or a logo over a photo so viewers can connect the picture with its creator, brand or copyright notice. This editor adds a watermark in your browser: you see a live preview while you adjust wording, logo size, position, opacity and rotation, then download a separate copy without uploading the original.
Use a single mark in a corner for a subtle credit, or tile the watermark diagonally across the image when you want proofs that are harder to crop cleanly. Text size and logo scale are percentages of the image width, so the watermark stays proportional on both small previews and large camera files.
How to add a watermark
- Upload a JPG, PNG or WebP photo, or paste one from the clipboard.
- Choose Text or Logo. For text, enter the wording and pick a font; for a logo, upload a PNG with transparency when possible.
- Select Single placement with the 9-point grid and margin, or Tile for a repeating pattern.
- Adjust opacity, rotation, color, outline and shadow so the mark stays readable on light and dark areas.
- Pick an output format (keep original, JPG, PNG or WebP), set quality if needed, then create and download the file.
A light opacity often looks more professional on finished photos. For client proofs or social previews, a tiled watermark usually offers stronger casual reuse protection than a single corner mark.
Formats and privacy
JPG is a good default for photographs. PNG keeps sharp logos and transparency. WebP is efficient for the web. When you export JPG over a transparent logo, choose a background colour so empty pixels do not turn black.
The Canvas API draws the watermark on your device only. Your original file is never changed and is never uploaded to a server. Keep an unmarked master so you can create different versions for different platforms later.