Watermark Image
Protect your photos and documents with custom text or logo watermarks. Everything is processed securely in your browser.
How to add a watermark
Secure your photography and documents in seconds.
Select Image
Upload the photo or document you want to protect. Everything runs in your browser securely.
Customize
Type your text or upload a logo. Adjust the opacity, rotate it, or tile it across the image.
Export
Click generate and download the watermarked image immediately without waiting in queues.
Frequently Asked Questions
Is this tool completely free?
Yes! File Gulp provides completely free file conversion tools with no hidden fees, no watermarks, and no registration required.
Are my files safe?
Absolutely. Unlike other converters, File Gulp uses modern WebAssembly technology to convert files directly on your device. Your files never leave your computer, ensuring maximum privacy.
Does it work on mobile devices?
Yes, our tool is fully responsive and works perfectly on smartphones and tablets, directly from your mobile browser.
Will the quality be affected?
No, we use high-quality algorithms to ensure your output files maintain the best possible quality during conversion.
Is there a file size limit?
Very large files may be limited by your device memory/browser performance. For normal image sizes, conversion is fast and seamless.
100% Client-Side Processing
Uploading sensitive documents, unreleased art, or private photography to a random server is a massive security risk. Our tool leverages the HTML5 Canvas API to apply watermarks entirely within your browser's memory. Your files never touch our servers.
Total Protection
A single watermark in the corner of an image can be easily cropped out by content thieves. Use our Tile Pattern feature to repeat your logo or text dynamically across the entire image, making it practically impossible to remove without destroying the photo.
Best Practices for Watermarking
- Keep it subtle: Set the opacity between 30% and 50%. The goal is to protect the image, not ruin the viewer's experience.
- Use PNG for Logos: If you are uploading a custom logo as a watermark, ensure it is a transparent PNG or SVG for the cleanest look.
- High Contrast: If your photo is generally dark, use a white watermark. If it's light, use a black or dark grey watermark to ensure visibility.
- Rotate it: A 45-degree angle watermark is visually standard for confidential documents and deters automated removal tools.
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