Original Preview
Upload an image to see the preview.
Image Toolkit
Add Watermark
Add text or image watermarks with position and opacity controls.
Files are processed in your browser and are not uploaded to a server.
Upload Base Image
Upload the image you want to add a watermark to.
Large images may slow down your browser.
Optional
Upload Watermark Image
Upload a logo or signature image to use as a watermark. You can skip this if you only want a text watermark.
Large images may slow down your browser.
Use text input for a text watermark, or upload a logo/signature image when you want an image watermark.
Result Preview
Adjust the options and check the result before downloading.
Files are processed with browser canvas and native APIs whenever possible and are not uploaded to a server.
How to use
- 1.Choose a file or enter values.
- 2.Process
- 3.Download ZIP
Cautions
- 1.You can preview the result before downloading.
- 2.Large files can use significant browser memory.
- 3.Output quality can vary by source file, browser, and format behavior.
- 4.This is a no-server-upload MVP, so some advanced features are planned for later.
FAQ
Are files uploaded?
Files are processed with browser canvas and native APIs whenever possible and are not uploaded to a server.
Can results vary?
These calculations are planning estimates. Actual results vary by browser, format, and image content.
Can I preview before downloading?
You can preview the result before downloading.