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How to Batch Watermark Photos Online: Add Text or Logos Instantly

Protect your photos by adding text or transparent PNG logo watermarks to multiple images at once. Processed locally in your browser.

Why you should watermark your images

If you are a photographer, real estate agent, designer, or e-commerce seller, publishing your original photos online carries the risk of image theft. Competitors or scrapers can easily save your photos and reuse them without permission.

Adding a watermark — either a copyright text line or a transparent company logo — establishes ownership and discourages unauthorized reuse. By applying watermarks in a batch, you can secure an entire collection of images in one quick step.

Text watermarks vs logo overlays

Depending on your brand and workflow, you can choose between two main watermarking options:

  • Text Watermark: Simple and flexible. You can type your name, website URL, or copyright notice. You can change fonts, sizes, colors, and transparency on the fly.
  • Logo Watermark: Looks professional and builds brand awareness. For best results, use a transparent PNG logo so the watermark overlays cleanly without solid background blocks.

How to batch watermark photos locally

With PhotoTools, your watermarking happens inside your browser. Your high-resolution master photos are never uploaded to a third-party server, keeping them secure.

  1. Drop multiple photos into the Batch Watermark tool.
  2. Choose between Text mode or Logo mode.
  3. If using a logo, upload your transparent PNG file.
  4. Position the watermark using the 9-point grid and adjust the size and opacity sliders.
  5. Click Apply & Download to export your watermarked photos.

Best practices for professional watermarking

A watermark should protect your image without distracting the viewer from the content itself. Keep the watermark opacity between 30% and 50% for a subtle blend.

Positioning matters: placing a small watermark in the lower-right corner is standard for attribution. However, if you are sending proof images to a client before payment, placing a larger, semi-transparent watermark in the center of the photo provides stronger protection against cropping.

FAQ

Can I adjust the scale of the watermark logo?

Yes. The tool lets you set the logo size as a percentage of the base photo's width. This ensures the logo stays proportionally sized whether your photos are large landscape shots or vertical thumbnails.

What image formats can I watermark?

You can upload JPG, PNG, WebP, or HEIC files. The tool draws the watermark over the base pixels and re-saves the images in your chosen output format (usually JPG or PNG).

Can someone erase my watermark?

A watermark is a deterrent, not a lock. Advanced users can crop out corner watermarks or use AI repair tools to paint over simple logos. For maximum security, use a centered, semi-transparent logo overlay.

Ready to watermark your photos?

Open Batch Watermark Tool

Related reading

How to add watermarks without making photos look cheapHow to prepare passport photos for printingWhat happens when you upload a photo to an online tool?

Frequently asked questions

What opacity is best for watermarks?

Keep the opacity between 30% and 50%. This makes the watermark clearly legible while remaining subtle enough to avoid ruining the photo's details.

Will the watermark fit different sized photos?

Yes. The watermark scale is calculated as a percentage of each individual photo's width, keeping the alignment and sizing consistent across different resolutions.

Is it safe to batch watermark my original photos here?

Yes. All image compiling happens inside your browser. Your master files never travel to our servers.