Add a Watermark to Images Free Online

Frequently asked questions

Which files can I watermark?

Image files — PNG and JPEG. The watermark is drawn onto a canvas in your browser and exported as a new image, so the original file on your device is never modified.

Does a watermark actually stop people reusing my work?

It deters casual reuse and makes the source obvious when an image is shared on, but it is not protection. A determined person can crop or edit it out, so treat it as attribution rather than security.

Where should the watermark sit?

A corner keeps the image usable but is trivial to crop away. A tiled or centred watermark across the subject is far harder to remove, which is the right choice for proofs and previews.

Pro tips

Place the mark over the subject, not the background. A corner watermark on a flat sky is a thirty-second edit to remove.
Tile a repeated mark across proofs you are sending to a client, where deterrence matters more than the image looking pristine.
Watermark last in your pipeline, after cropping and resizing, so the mark ends up the size you intended.
Include something identifying rather than decorative — a name or domain does more for you than an abstract logo if the image travels.
Keep opacity high enough to survive a screenshot and a re-compression; a very faint mark disappears into JPEG artefacts.

About Watermark Adder

A visible mark is a deterrent rather than a lock — it discourages casual reuse without preventing a determined crop. Placing it across the subject instead of in a corner is what makes it awkward to remove.

Overlay a custom text or logo watermark onto your images and documents to mark them as drafts or deter unauthorised reuse. Files are watermarked locally in your browser and never uploaded.

Protect your photos and graphics by overlaying custom text or a logo, then adjust the position, size and opacity until it looks right and download the result. A subtle watermark deters unauthorised reuse of product shots, proofs, screenshots and creative work.

Add a semi-transparent copyright line, or tile a logo across the whole canvas so a crop cannot simply remove it. Position, size and opacity are all adjustable until the mark sits where it does not fight the subject.

Placement is a straight trade between how easily the mark is removed and how much it spoils the image. A small corner mark is unobtrusive and a crop away from gone. A large low-opacity mark across the middle is much harder to remove and much more visible to the people you actually want looking at the picture. Most useful settings sit between: text large enough to read at thumbnail size, around 30 to 50 percent opacity, positioned over detail rather than flat background where it would be simple to paint out.

Two practical details decide whether a watermark survives contact with the real world. Apply it after resizing, or the mark scales with the image and can end up illegible at the size actually published. And keep an unmarked master — you will eventually need a clean version for a licensed use, and re-creating one from a watermarked export is not possible.

Common use cases

Marking proofs or drafts before sending them to a client
Adding attribution to images before posting them publicly
Branding screenshots for documentation or a presentation

How it comparesDesktop editors offer blend modes and batch actions a single-purpose tool does not, and Photoshop is a heavy way to add one line of text. The meaningful difference from upload-based watermarkers is that a proof you have not been paid for is never handed to a third party in order to mark it.