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Add Watermark to Images Online — Bulk Watermark Tool

Add your logo or text watermark to product images in bulk. Set position, size and opacity. Process your entire catalogue in one click.

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CompressConvertResizeCropRotate & FlipWatermarkRound CornersRename
Step 1 of 3
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Add your product images. Nothing leaves your browser.

JPG, PNG, WebP, GIF
Multiple files at once
Private — stays local
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Watermark
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Drop images here
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100% private · no uploads · bulk & fast

Add watermark to images protect your product photos

Add logo or text watermarks to product images in bulk. Configurable position, size and opacity. Apply to your entire catalogue at once. No uploads. No account.

Your images never leave your device
Logo or text watermark
9 position options
Works offline in your browser
See the difference

Protected. Branded.

A visible watermark deters image theft while maintaining a professional appearance. Position it in the corner where it is visible but non-intrusive.

Logo or text watermark
Opacity 10–100%
Applied to entire batch
Before
After
Result
product-shoe.jpg
No protection
Watermark added
Protected
bag-hero.jpg
No branding
Logo bottom-right
Branded
watch-detail.jpg
Vulnerable
Text watermark
Secured
dress-lifestyle.jpg
No attribution
Brand visible
Attributed
How it works

Add watermarks in 3 simple steps

1

Upload your images

Drag & drop your product images. The watermark will be applied to your entire batch.

2

Configure watermark

Upload your logo (PNG with transparent background) or enter text. Set position, size and opacity.

3

Download as ZIP

All watermarked images are packaged in a ZIP file ready to upload to your store.

Perfect for

E-commerce, blogs & more

E-commerce Protection

Prevent competitors from using your product photography on their own stores or listings.

Brand Awareness

Every image that gets shared online carries your brand logo — free marketing.

Photographer Portfolio

Protect your work from unauthorised use while sharing previews with clients.

Social Media

Branded images stand out on Instagram and Pinterest — and always link back to your store.

Watermark options

Configure your watermark with full control over appearance and placement.

Logo (PNG transparent)Text watermark9 position optionsAdjustable opacityAdjustable size

Frequently asked questions

Do watermarks affect SEO or image search rankings?

Watermarks do not directly affect your search rankings. However, they can indirectly help by preventing image theft — if competitors steal your images without watermarks, they may rank for the same image searches with your photography.

Can I add my logo as a watermark?

Yes. Upload your logo in PNG format with a transparent background for best results. The logo is overlaid on your product images with your chosen opacity, position and size.

Will watermarks prevent my images from being used on Amazon?

Amazon prohibits watermarks or logos on main product images. Additional product images may include watermarks. Watermark only your store images and keep clean versions for marketplace submissions.

What is the best position for a product image watermark?

The lower corners (bottom-right or bottom-left) are the industry standard for product watermarks. They are visible enough to deter theft without obscuring the main product.

What opacity should I use for my watermark?

40–60% opacity produces the most professional results. The watermark is clearly visible at this level without dominating the image.

Your images never leave your device

All processing happens 100% inside your browser using the Canvas API. We never upload, store or track your files. Your privacy is safe — unlimited and always protected.

Try for free →
No sign-up required

Why Product Image Watermarking Matters

Image theft is a significant and growing problem in e-commerce. Competitors and third-party sellers regularly steal product photography from established stores, using your investment in professional images without permission or attribution.

A visible watermark is the most cost-effective deterrent against image theft. It makes your images significantly less useful to thieves while simultaneously reinforcing your brand identity every time your product photo appears — on your store, in Google Shopping, on social media, or anywhere else.

✓ Deter image theft ✓ Brand every product photo ✓ Logo or text watermark ✓ 9 position options ✓ Adjustable opacity

Watermark Best Practices for E-Commerce

Position: bottom right or bottom left

The bottom corners are the industry standard for product watermarks. They're visible enough to deter theft but don't obstruct the main product. Avoid centre placement — it obscures the product and significantly hurts conversion rates.

Opacity: 40–60% for the right balance

A semi-transparent watermark is more professional than a fully opaque one. At 40–60% opacity, the watermark is clearly visible and deters theft without dominating the image. High opacity (80%+) looks aggressive and can reduce customer trust.

Size: 15–25% of image width for logos

The watermark should be noticeable but not dominating. For a 1000px image, a logo of 150–250px width is typically ideal. imgflow sets size as a percentage so it scales correctly across all image sizes in your batch.

Logo vs text — when to use each

Use your logo watermark for professional product photography where brand recognition matters. Use text watermarks for catalogue images, supplier photos, and cases where you want to include your website URL or copyright notice.

Frequently Asked Questions

Do watermarks affect SEO or image search rankings?
Watermarks don't directly affect your search rankings. However, they can indirectly help by preventing image theft — if competitors steal your images without watermarks, they may rank for the same image searches with your photography. Watermarked images are less likely to be stolen and used in ways that compete with your own content.
Can I add my logo as a watermark?
Yes. imgflow supports both text and image (logo) watermarks. Upload your logo in PNG format with a transparent background for the best results. The logo is overlaid on your product images with your chosen opacity, position and size.
Will watermarks prevent my images from being used on Amazon or Google Shopping?
Amazon prohibits watermarks or logos on main product images (the images with white backgrounds). Additional product images can include watermarks. Google Shopping has no specific rules against watermarks on product images. Watermark only your store images and keep clean versions for marketplace submissions.