No upload, 100% local, no account

Add watermark to image

Add a text or image watermark with full control over opacity, position, size and rotation. Nothing leaves your device.

How Add watermark works

Image Watermark overlays a text string or a second image onto your photo directly in the browser, then exports the composite as a single flat file. You control the opacity, position (nine-point grid or free placement), font, size, colour and, for tiled watermarks, the repeat spacing. The original photo and the watermark asset are both read from your local disk and composited using the Canvas API; neither file is sent to any server at any point.

Text watermarks are rendered using the browser's text rendering engine, so any font available on your system can be used. Image watermarks (PNG logos with transparency, for example) are drawn with the alpha channel intact, blending naturally onto the photo. The flattened output contains only the merged pixels; there is no embedded watermark layer that could be stripped by removing metadata.

Written by Bastien Sulyan

How to use Add watermark, step by step

  1. Drop the photo you want to watermark onto the upload area.
  2. Choose text watermark or image watermark and configure the content, font, size, colour and opacity.
  3. Select a position preset (corner, centre, tiled) or drag the watermark to your preferred spot.
  4. Preview the result and adjust opacity or scale until you are satisfied.
  5. Click Apply and Download to save the flat composite image.

Common use cases

  • A photographer adds a semi-transparent copyright notice to portfolio images before sharing previews with clients online.
  • A company logo is tiled across product images at low opacity to prevent unauthorised commercial reproduction.
  • A real-estate agency overlays its branding on property listing photos without sending sensitive or exclusive images to an external watermarking service.
  • A designer pre-approves a layout proof by adding a diagonal draft watermark for the client review round.

Frequently asked questions

Can someone remove the watermark from my image?

The tool exports a flat, pixel-merged image. There is no separate layer, no EXIF entry and no detachable element. A determined person can attempt to paint over or clone-stamp the watermark in editing software, as with any raster overlay. For critical copyright protection, a tiled full-image watermark at moderate opacity is harder to remove than a single corner mark.

Does the watermarked image reveal that this tool was used?

The exported file is a standard JPEG or PNG with no metadata indicating which software produced it. The EXIF of the original photo is not carried into the output by default.

Can I watermark multiple images at once?

The current version processes one image at a time. You configure the watermark once, apply it and download, then reload a new photo. Batch processing is not available in this release.

Which image formats are accepted as the watermark overlay?

PNG files with transparency work best as overlay images because the alpha channel is respected, allowing a logo to blend naturally onto the photo. JPEG overlays are also accepted but will have a rectangular bounding box rather than a transparent shape.

Is my photo transferred to the cloud to add the watermark?

No. Both the photo and the watermark asset are read from your local filesystem. The Canvas compositing happens inside the browser tab and the result is saved directly to your device. Checking your browser's Network panel during the process will confirm no image data is transmitted.

Do I need an account to watermark my photos?

No. There is no sign-up, no account and no per-image limit. Configure the watermark and download, as many times as you need.

Can I add a watermark to a photo on my phone?

Yes. Positioning and typing the watermark text works with touch input on a mobile browser, though a tiled or precisely placed logo is easier to fine-tune on a larger screen.