Add Watermark to
Images & PDFs Online Free
100% browser-based. Your files never leave your device. Add text or logo watermarks to images, batch process photos, and watermark PDFs.
Choose Your Tool
Watermark Image
Add text or logo watermarks to JPG, PNG, and WEBP files. Batch process multiple images and export as PNG, JPG, or WEBP.
Try it free →Watermark PDF
Add text watermark to every page of your PDF. Diagonal, centered, or tiled. Apply to all pages or specific pages only.
Try it free →Watermark PNG
Preserve transparency when adding watermarks to PNG files. Downloaded file keeps the original transparent background.
Try it free →How It Works
Upload your file
Select JPG, PNG, WEBP, or PDF files from your device. Drag and drop or click to browse. Nothing is sent to our servers.
Customize watermark
Type watermark text, upload an optional logo, choose position, adjust opacity, size, color, and rotation angle.
Download instantly
Click Apply Watermark and download your processed file list directly to your device. No email, no account required.
Why "No Upload" Matters for Privacy
Most online watermark tools require you to upload your file to a remote server. This means your documents, contracts, photos, and sensitive files pass through someone else's infrastructure. With freewatermark.online, all processing happens entirely inside your browser using modern JavaScript APIs — the HTML5 Canvas API for images and pdf-lib for PDF files.
This approach is not just a privacy feature — it also makes the tool significantly faster. There is no upload time, no queue, and no server-side processing delay. You click Apply Watermark and the result is ready in under a second, regardless of your internet speed.
What You Can Customize
- ✓ Watermark text — any characters, any language
- ✓ Logo watermark — upload your own PNG, JPG, or WEBP logo
- ✓ Batch image processing — apply the same settings to multiple images
- ✓ Font size from 10px to 200px
- ✓ Opacity from 5% to 100%
- ✓ Color — full hex color picker
- ✓ Rotation angle — diagonal, horizontal, or vertical
- ✓ Position — 9-point grid or full tiled repeat
- ✓ PDF page range — all pages, odd, even, or first page only
Frequently Asked Questions
Is this watermark tool really free?
Yes, completely free. There are no hidden charges, subscriptions, or premium tiers. All features on freewatermark.online are available at no cost.
Do you upload my files to a server?
No. Your files are processed entirely in your browser using JavaScript. They are never sent to any server — not ours, not a third party's. Once you close the tab, no trace of your file exists anywhere online.
What file formats are supported?
We support JPG, PNG, and WEBP images, as well as PDF documents. Image exports support PNG, JPG, and WEBP. PNG transparency is fully preserved in the dedicated PNG tool.
Is there a file size limit?
Since all processing happens in your browser, the only practical limit is your device's available memory. Most modern computers handle files up to 50MB comfortably. Very large PDFs (100MB+) may be slow on older devices.
Does this work on mobile?
Yes. The tool is fully responsive and tested on iOS Safari and Android Chrome. You can watermark a photo from your camera roll and download the result in seconds.
Will freewatermark.online add its own branding to my files?
Absolutely not. We only add the text or logo watermark that you specify. We do not add any URL, attribution, or extra branding to your downloaded files.
Can I watermark multiple files at once?
Yes. The image watermark tool lets you select multiple JPG, PNG, or WEBP files and applies the same text or logo watermark settings to the whole batch.