Image Watermark Tool

How to add a watermark to an image

Drop one or more images into the tool above. Choose a text or a logo watermark, set the look, and the preview re-renders on every change. When it looks right, download the single image or a ZIP of the batch.

The whole pipeline is the browser Canvas API. Your file is decoded into an image element and drawn onto an offscreen canvas. The watermark is painted on top, then the canvas is exported with toBlob. No server sees the picture.

Text marks use fillText with an optional drop shadow so light type stays readable on light photos. Logo marks use drawImage and scale to a chosen percentage of the image width, so a logo lands the same relative size on every photo in a batch.

Position, opacity, tiling, and angle

A nine-point grid anchors the mark to any corner, edge, or center, with an adjustable margin. The opacity slider sets how visible the mark is — a light 35 to 55 percent reads as a subtle signature, while full opacity asserts ownership. The angle slider rotates the mark from flat to a steep diagonal.

Turning on tiling repeats the mark across the entire frame at the chosen angle. The compositor rotates around the image center and paints an over-sized grid, so the pattern fully covers the photo regardless of the angle you pick. A diagonal tiled mark is the standard anti-theft pattern you see on stock-photo previews.

Why and when to watermark

A watermark does two jobs: it credits you and it deters reuse. For portfolios, client proofs, and social posts, a subtle corner mark keeps attribution attached as the image gets shared and re-saved. For preview galleries and stock-style sharing, a tiled diagonal mark makes the file unusable until someone licenses the clean version.

Creators and small studios watermark product shots before posting so a reposted image still points back to the brand. Photographers send watermarked proofs so clients can choose without getting a usable final. Agencies stamp draft creative so internal versions never leak as finished work.

Batch watermarking for a full set

When you drop several images, the tool applies one identical setup to every file and exports a ZIP. This is the fast way to brand an entire product line, a shoot, or a week of social assets. Because the ZIP is assembled in the browser, a large batch never uploads — it just runs on your machine.

For consistency across a batch, use percentage-based sizing rather than fixed pixels. A logo set to 20 percent of image width looks the same on a 4000px hero and a 1080px square, instead of huge on one and tiny on the other. The tool sizes both text and logos relative to each image.

Watermarking versus generating branded assets

A watermark protects images you already have. If you are creating the assets in the first place, branding them at the source is cleaner than stamping them afterward. That is where this tool hands off to a real studio rather than competing with it.

Inside the Playcut studio, your logo, colors, and typography live in a brand kit, and the AI image generator can place brand elements as it composes — so the output ships on-brand instead of needing a watermark pass. Use this tool to protect existing files, and create new branded visuals in Playcut when you want the brand baked in.

These image tools also pair well together. Frame the shot with the image resizer, shrink the file with the image compressor, then add a watermark here as the final step before you publish or hand it off.

Image Watermark Tool FAQ

How do I add a watermark to an image for free?

Drop your image into the tool above, type your text or upload a logo, then set the position, opacity, and angle. The watermarked image renders instantly and you download it with one click. It is completely free, needs no signup, and works on a single photo or a whole batch at once.

Does this watermark tool upload my photos anywhere?

No. Every step — decoding the image, compositing the watermark, and exporting the file — runs in your browser with the Canvas API. Your photos never leave your device, which is why the tool works offline and keeps client work, product shots, and personal images private.

Can I watermark many images at once?

Yes. Drop multiple files and the tool applies the exact same text or logo, position, opacity, and angle to every image. Click Download all to get a ZIP of the whole batch. The ZIP is built in your browser too, so even a large batch never touches a server.

What is the difference between a corner watermark and a tiled watermark?

A corner (or edge) watermark sits in one anchored spot with a margin — clean and subtle for portfolios and product shots. A tiled watermark repeats the mark diagonally across the whole frame, which is far harder for someone to crop or clone out. Use tiling when protecting an image from theft matters more than looks.

Which format should I export — PNG, JPEG, or WebP?

Use PNG when you need the sharpest text or a logo with transparency and file size is not a concern. Use JPEG for photographs where smaller files matter and there is no transparency. Use WebP for the best size-to-quality balance on the modern web. The quality slider appears for JPEG and WebP only.