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.
- Drop multiple photos into the Batch Watermark tool.
- Choose between Text mode or Logo mode.
- If using a logo, upload your transparent PNG file.
- Position the watermark using the 9-point grid and adjust the size and opacity sliders.
- 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.