Image Watermark

Add a text or logo watermark over an image with adjustable position and opacity.

Category: Image Tools

When to use?

Use it to add a source or brand logo to blog, shop, or portfolio images to reduce reuse and unauthorized copying.

How to use

  • Select the source image.
  • Choose a text or logo watermark and set position/opacity.
  • Download the watermarked image.

Input Explanation

Enter the source image, watermark text or logo image, position, opacity, margin, and output format.

Calculation Basis

It draws the original on Canvas, composites the text or logo at the chosen position with a globalAlpha value, and encodes a new image.

Usage Examples

  • Brand marking - Repeatedly apply a logo or source text to content images.
  • Prepare images for upload - Preview the result, then tidy images for blogs, shops, or social media.
  • Compare results - Check original and result side by side for quality and display.

Examples

  • Insert a brand logo at 55% opacity in the bottom-right of a product photo
  • Insert a semi-transparent text watermark in the center of a portfolio image

Cautions

  • It is re-encoded via Canvas, so original metadata may not be included in the new file.
  • Extremely high-resolution large files may fail to convert due to browser image-decoding limits.

FAQ

Can I use a logo watermark?

Yes, select a separate logo image to composite over the original.

Are the original or logo sent to a server?

No. Compositing runs in the browser, so neither is uploaded.

Text or logo — what can I add?

Choose a text watermark or a logo image watermark, with adjustable position and opacity.

Can I change the watermark position?

Yes. Adjust position (corners/center), opacity, and size so it does not block the content.

Related Tools

  • Image Mosaic / Blur - Blur sensitive areas like faces, names, and addresses in photos/screenshots, in the browser.
  • Image Tint Tool - Apply a color overlay or tint to an image.
  • Image Resizer - Resize multiple images in the browser with aspect ratio kept, no server upload.
  • Image Format Converter - Convert PNG, JPG, and WebP images to each other in the browser.
  • Image Cropper - Enter pixel coordinates to crop just the area you need, in the browser.
  • Image Rotate / Flip - Rotate images in 90-degree steps or flip them horizontally/vertically.