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Batch logo overlay

Image Watermark Tool

Apply one logo or watermark image to many images as a single mark, horizontal repeat, or diagonal repeat.

Browser processing · no file upload to our server

Upload images to watermark

JPG, PNG, WebP, HEIC · up to 20 files · 20MB each

Processed in your browser · no server upload

1. Choose2. Convert3. Download

Watermark Image

Choose one logo, signature, or brand mark image.

Position and Output

Apply the same watermark settings to every uploaded image.

Placement mode

Watermark position

Placement preview18%
LOGO
Tokens

Examplesample-image.png

{name}=source filename, {index}=number. Leave blank to use the source filename.

Upload at least 1 target image to apply a watermark.

Preview
Upload an image to compare the original and result here.
Uploaded files and conversion results will appear here.

How to use Image Watermark

Use this browser-based watermark tool when product photos, detail images, or social assets need the same logo or signature. Upload target images, choose one watermark image, tune single, horizontal, or diagonal placement, and download individual files or a ZIP.

Recommended workflow

  1. 1.Upload the images you want to watermark.
  2. 2.Choose the logo or image to use as the watermark.
  3. 3.Choose single, horizontal repeat, or diagonal repeat and adjust size and opacity.
  4. 4.Check the filename pattern and apply the watermark.
  5. 5.Download individual files or the ZIP.

Image Watermark output checks

  • Check the output KB or MB against the upload limit.
  • Verify pixel dimensions and whether transparency is preserved.
  • Open at 100% size to check text and edge sharpness.
Processing method

Watermark pixels are composited over each source image using the selected position, size, and opacity. Repeat modes apply that setting across the canvas.

How files and inputs are handled

This tool processes files and inputs in the current browser. OneClickTool does not receive or store the original content on its own server.

Frequently Asked Questions

Can I watermark multiple images at once?

Yes. Upload target images, choose one watermark image, and apply the same placement mode, size, opacity, and spacing to the full batch.

Can I repeat the watermark across the image?

Yes. Choose a single placement, horizontal repeat, or diagonal repeat, then adjust size, opacity, and spacing before exporting.

Are my images uploaded to a server?

No. The watermark is composited in your browser, and original images are not uploaded to OneClickTool.

Supported Scope

JPG, PNG, WebP, and HEIC images can be converted, compressed, resized, or prepared with presets.

RAW editing, SVG vector editing, and AI background removal are not currently supported.

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