Watermark Image
Add text or logo watermarks to your photos.
How to Use Watermark Image
- Upload your file: Drag and drop your file into the active processing area above, or click the box to browse your device files.
- Configure settings: Select your preferred options (such as target file size in KB, compression level, page order, or output format).
- Process locally: Click the primary action button. Your file is rendered and encoded in seconds directly inside your browser memory.
- Download output: Click Download to save the modified document back to your device. No watermarks are added.
Zero-Cloud Privacy Guarantee
Unlike legacy web utilities that upload your sensitive documents to remote servers, PDFtiny executes 100% of processing inside your local browser using WebAssembly. Your files never leave your computer, ensuring complete privacy, enterprise compliance, and offline availability.
Technical Specifications
| Parameter | Specification |
|---|---|
| Processing Engine | Client-Side WebAssembly (WASM) & HTML5 File API |
| Server Transmission | 0 Bytes Uploaded (100% Local Browser Memory) |
| Device Compatibility | Chrome, Safari, Firefox, Edge, Android, iOS, Windows, Mac, Linux |
| Compliance | ISO 32000-2:2020, GDPR Article 25 (Privacy by Design) |
Frequently Asked Questions
Can I use a transparent PNG logo as a watermark?
Yes, upload your transparent PNG logo and position it anywhere on your photo. You can adjust scale, opacity, and padding.
Can I create a tiled diagonal text watermark across the whole image?
Yes, select the
Can I batch watermark multiple photos at once?
Yes, apply your branding template once and batch stamp dozens of portfolio photos or real estate listings simultaneously.
Will the original image resolution be degraded?
No, watermarks are composited at full native photo resolution, retaining original image dimensions and quality.