Image Watermark

Watermark images in three steps

1. Choose up to ten supported static PNG or JPEG images. Select text or load one local logo, then choose its relative size, position, angle and opacity.
2. Select Apply watermark. The same settings are applied at each image's oriented pixel dimensions. If an image or mark does not fit the supported limits, the batch stops without partial downloads.
3. Review each finished image in Fit or 100% view. Download individual images, or create and download a ZIP containing all current results.

Understand size, placement and opacity

Relative sizes and margins use the shorter side of each oriented image. Text size is its font em size; logo size is the width of the entire logo rectangle, including transparent padding. Neither setting resizes the base image.

Positive angles turn clockwise. Placement uses the rotated visible text bounds or complete logo rectangle, with the chosen margin and an additional one-pixel edge guard. A mark that does not fit is rejected rather than clipped or silently shrunk.

Opacity affects only the watermark. A transparent logo keeps its own alpha, multiplied by the chosen opacity. PNG can retain transparency; JPEG uses an opaque white background and fixed encoding quality. Check contrast: a mark can be hard to see even when it fits.

Text is normalized to NFC and must fit one pinned font's supported Latin, Cyrillic or Han repertoire. Unsupported scripts, emoji and special sequences are rejected instead of silently using replacement glyphs. A local logo can carry other lettering.

Examples to check before downloading

On a 1200 by 800 image, a 50% logo setting makes a 400-pixel-wide logo. A 400 by 100 logo rotated by 90 degrees occupies 100 by 400 pixels before the margin and edge guard are considered.

A logo pixel with 40% alpha at 50% opacity contributes 20% effective alpha. The base image is not faded to match the watermark setting.

Two selected files with the same name remain two images. Results are named watermarked-01, watermarked-02 and so on, and a ZIP contains those exact current image files.

Formats and preservation limits

The initial profile accepts supported 8-bit noninterlaced static PNG and 8-bit grayscale or three-component JPEG. Animation, PNG EXIF, CMYK and other formats or unsupported structures are rejected. Each base image is limited to 16,777,216 pixels and 20 MiB, with separate batch limits.

Oriented pixel dimensions are retained, but images are decoded and encoded again. Color, resampling, metadata, compression and resolution hints can change. JPEG output is not lossless, and identical pixels across different browsers are not promised.

This is visible attribution, not copy protection, watermark removal or redaction. Text and logo modes are alternatives; combined marks, repeating patterns and separate settings for each image are not included.

Cancellation retires the result and prevents later publication, but native image or font work may continue until it settles. Some high-resolution camera images exceed the limits; the tool does not silently reduce them to fit.

Local files and current results

This tool does not upload or store your images, filenames, logo or watermark text. Text mode may load fixed bundled fonts from this site. Edits and Clear retire the previous results and ZIP; the site's general privacy policy still applies.