Image Watermark
Drag an image or click to upload
PNG, JPEG, WebP, GIF
The preview will appear here after uploading an image
Frequently Asked Questions
How the online watermark works
What image formats are supported?
You can upload images in any format supported by the browser: JPEG, PNG, WebP, GIF (first frame), BMP, AVIF. The result is always downloaded in PNG format to preserve maximum quality and support transparency.
Are images uploaded to a server?
No. All processing happens entirely in the browser using the HTML5 Canvas API. Your image never leaves the device and is not sent to any server. You can use this tool even for confidential images or those containing sensitive data.
Can I use a logo instead of text?
This tool only supports text watermarks. To insert a logo as a watermark, you can use desktop tools like Adobe Photoshop, GIMP (free) or Canva that support layer compositing with images.
How do I choose the right font size?
The size depends on the image resolution. For standard web images (1920×1080) a font of 30-50px is adequate. For high-resolution images (4K, print) consider 80-150px. The real-time preview helps you find the optimal size.
Which image formats can be loaded?
Everything the browser can read: JPEG, PNG, WebP, GIF with its first frame, BMP and AVIF. The result always downloads as a PNG, which keeps full quality and transparency.
Are the images uploaded to a server?
No, the watermark is drawn on an HTML canvas inside the browser and the image never leaves the device. It can be used on confidential documents or photos carrying sensitive data.