Private by design
image processing stays in your browser. ResizeNest does not need your original image uploaded to an application server.
Image tool
Add a Watermark to Images
Add a text or logo watermark to one image or a local batch. ResizeNest composites the watermark into the actual output pixels in the browser worker, while the preview remains a non-authoritative editing aid.
Local processing Batch ready JPG · PNG · WEBP · AVIF
Start here
Use add a watermark to images now
No account is required. Choose a file and work directly in this browser.
Real output
Results come from the actual processing pipeline, with measured dimensions, bytes and format instead of placeholder estimates.
Simple workflow
Process one image or a local batch, then download current successful results.
Three simple steps
How to use add a watermark to images
- 01
Choose, drop or paste JPG, PNG, WebP or AVIF base images, then choose a text watermark or load a supported logo.
- 02
Set placement, opacity, relative or absolute size, rotation, margins or tiling. Relative sizing keeps a consistent visual scale across portrait and landscape batch images.
- 03
Process the current recipe, review the worker-produced result, then download one current result or current successful results as a ZIP without leaving /watermark-image.
Useful details
Built for a clear, predictable result
Understand what the tool does before you download the result.
Text and logo watermarks
Text uses ResizeNest's self-hosted Inter font baseline with deterministic glyph handling. Logo mode keeps logo bytes separate from the base image recipe and accepts verified raster logos plus a conservative sanitized SVG subset with no scripts or external resource fetches.
Placement and opacity
Nine anchors, normalized image-space coordinates, relative or pixel margins, rotation and alpha opacity are converted into source-image geometry. A watermark that extends outside the image is cropped as placed instead of being silently moved back inside.
Consistent bulk watermarking
Relative sizing is the batch default, so an 8% watermark means 8% of each image width. You can switch an individual file to an absolute pixel size, and reruns always start from immutable original bytes so watermarks do not stack.
Real pixels, local export
The watermark operation runs after base image operations and before one final encode. Downloaded images contain actual composited watermark pixels, and ZIP export includes only current successful results from the same /watermark-image route.
A watermark is not copy protection
A visible watermark can communicate ownership or branding, but it does not technically prevent copying, cropping, editing or removal. ResizeNest does not present watermarking as guaranteed copy protection.
Questions, answered
Frequently asked questions
Can I add the same watermark to several images?
Yes. Relative size and shared placement make consistent local batch watermarking practical, while per-file overrides remain available when one image needs different placement or size.
Does changing the watermark stack another copy on the result?
No. Processing and retry reread the immutable original image and rebuild the current recipe, so editing a watermark does not watermark a previous watermarked output.
Can a logo watermark be SVG?
A conservative standalone SVG subset can be rasterized locally after safety validation. Scripts, event handlers, external resources, recursive references and font-dependent SVG text are rejected instead of being executed or silently fetched.
Does a watermark stop people from copying an image?
No. A watermark can mark or brand an image, but it does not guarantee copy protection and may still be cropped, edited or removed.
Does processing leave /watermark-image?
No. Settings, processing, retry, result review, single download and current-success ZIP export stay on /watermark-image.