Image Tools

Image Watermark

Stamps a line of text over the centre of one image with the size, opacity and colour you choose, then saves it in the original format. It runs in your browser; the image is not uploaded.

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Watermark Text

Font Size: 48px

Opacity: 30%

Color

How to Use

1Add one image.
2Type your text in the Watermark Text box (it starts as WATERMARK).
3Set Font Size (12 to 120 px) and Opacity (5% to 100%; default 30%).
4Pick a Color from the five swatches: white, black, red, green or blue.
5Click Add Watermark and download the watermarked image.

About this tool

Updated September 19, 2026

What you can set on the centre text stamp

The tool draws one line of text over the middle of your image. You control the words, size, opacity and colour.

Watermark Text starts as WATERMARK and can be replaced with anything, such as a name or website. Font Size ranges from 12 to 120 px in the image's own pixels. Opacity ranges from 5% to 100% and starts at 30%, so the text sits lightly over the picture. Color is limited to five swatches: white, black, red, green and blue. The lettering is bold Arial. Position is fixed at centre.

Files, formats and limits

One image per run, saved in its original format.

The picker accepts image files and processes a single file. The output keeps the input's type (JPEG, PNG, WebP and so on, by extension), with no quality control; JPEG output is written at about 92%. Text is not wrapped, so a long phrase on a narrow image can run past the edges. Big photos need a large font size to be visible, because size is counted in real pixels.

When a centre text watermark is enough

It suits quick marks on single images; other tools suit corner marks, logos and batches.

• Marking a client preview or proof image with 'PROOF' or a name at around 30% opacity. • Adding a website address to a photo before posting a sample. If you want the text in a corner or with more layout control, Add Text to Image offers a position option. To stamp a logo, use Add Logo to Image. For many photos with the same mark, try Bulk Watermark Images.

How much protection to expect

A visible watermark is a deterrent, not a lock.

Anyone can retouch, crop or paint out simple text, and there is no invisible or embedded watermark here. Pick a colour that contrasts with the picture: white vanishes on bright skies and black on dark scenes. The watermark is baked into the downloaded copy and cannot be removed later, so keep your unmarked original.

Features

Custom text, one line, drawn in bold Arial (falling back to a generic sans-serif)
Font Size slider from 12 to 120 px, measured in the image's own pixels
Opacity slider from 5% to 100% (default 30%)
Five colour swatches: white, black, red, green and blue
Text is always placed at the centre of the image; there is no position or tiling option
Output keeps the source image format; one image per run
Runs in your browser; the image is not uploaded

FAQ

Can I place the watermark in a corner or repeat it across the image?

No. This tool places a single line of text at the centre of the picture only. There is no position picker, tiling, rotation or logo option. To use an image or logo instead of text, try the Add Logo to Image tool.

Why does my watermark look tiny on a large photo?

Font Size is in the image's real pixels, not screen pixels. A 48 px label is small on a 4000 px wide photo. Raise the slider up to 120 px; if the text is wider than the image it will be cut off, since it is not wrapped.

Does a watermark stop people copying my photo?

It discourages casual reuse but cannot prevent it. A semi-transparent line of text can be retouched or cropped out by someone with editing skills. The centre placement makes cropping harder but not impossible.

Which format is the result?

The same format as the input, based on its file extension. There is no separate format or quality control, and JPEG results are encoded at about 92% quality.

Is my image uploaded to add the watermark?

No. The text is drawn on a canvas in your browser and the result is created locally.

Add Text to Image

Write a line of text onto an image with your own size, colour and position.

Add Logo to Image

Overlay a logo image on a photo with position, opacity and size controls.

Bulk Image Watermark

Add one text watermark to up to 100 images in your browser; several results download as a ZIP.