Image tool
Image Watermark
Stamp text watermarks with custom colour, size and position.
Image Watermark workspace
Workspace
Image Watermark
Drop an image here
or · PNG, JPG, WebP
Images are decoded and transformed with the Canvas API in this tab. Nothing is sent over the network.
Your image preview will appear here.
The guide
By the utils.sbs team · Reviewed November 2026 · How we build and review tools
Quick answer
Image Watermark is a free browser-based image tool. Stamp text watermarks with custom colour, size and position. It runs with the Canvas API locally, requires no account and does not upload your files. Open the page, add your input, adjust any options and download the result.
What is Image Watermark?
Image Watermark is a free browser-based image tool from utils.sbs. Stamp text watermarks with custom colour, size and position. It is built for quick, focused jobs: open the page, add your input, adjust the options and take the result with you. No account, install or server upload is required.
At a glance
| Category | Image |
|---|---|
| Input | PNG, JPEG, WebP or another browser-decodable image |
| Output | A processed image or archive in the selected output format |
| Engine | the Canvas API |
| Processing | In your browser |
| Price | Free |
| Account | Not required |
How Image Watermark works
Images are decoded and transformed with the Canvas API. Filters, resizing and format conversion happen locally, so the source file is never sent over the network.
How to use Image Watermark
- 1Open Image Watermark and add your input.
- 2Adjust the options: watermark text, font size, colour, opacity and more.
- 3Run the tool, check the preview or result, and download the output.
When to use Image Watermark
- Prepare an image for a website, email or social post.
- Convert between modern image formats without a desktop editor.
- Reduce file size or crop a screenshot before sharing it.
Inputs and options
- Watermark text
- Set this value before running the tool.
- Font size
- Enter a numeric value in px.
- Colour
- Set this value before running the tool.
- Opacity
- Set this value before running the tool.
- Position
- Choose one of 5 options.
Limitations
Very large images can hit the device's memory limit, and output quality depends on the browser's canvas encoder.
Privacy and accuracy
Image Watermark processes its input in the browser whenever the platform API allows it. Files and values are not uploaded to a server for processing, and the tool does not require an account. For calculations, use the result as a reference and verify important decisions against the source formula or a qualified professional. Read our methodology.
FAQ
Image Watermark questions
What can I do with Image Watermark?
Stamp text watermarks with custom colour, size and position. Image Watermark is part of the Image shelf on utils.sbs and is designed for quick, one-off tasks.
Is Image Watermark free to use?
Yes. Image Watermark is free, requires no account, and has no per-file or per-use charge.
Are my files uploaded when I use Image Watermark?
No. Image Watermark is designed to process your input locally in the browser. Files are not uploaded to a server for processing.
What formats does Image Watermark support?
It accepts common browser image formats such as PNG, JPEG and WebP, and lets you download the processed image in the output format you choose.
Can I use Image Watermark on my phone?
Yes. Image Watermark is responsive and works in modern mobile browsers. Very large files may be limited by the device's available memory.
Keep going
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- Image ConverterConvert images between PNG, JPEG, WebP and AVIF without uploading.
- Image CropperDrag a freeform box or snap a preset aspect ratio, straight in your browser.
- Image RotatorRotate images by 90, 180 or 270 degrees losslessly in the browser.
- Flip ImageMirror an image horizontally or vertically in one click.