wmk

5.8easy start · #32of 33
in Photo Watermarking Software

Runs on Linux, Mac, Windows.

wmk is ranked #32 of 33 in photo watermarking software on The Geeks Club. It runs on Linux, macOS, Windows. There is a free plan.

wmk plans and pricing

add-watermark Free MIT-licensed Python CLI; no paid plans listed github.com · 11 Oct 2026

Folio Lesson 17.7 bulkWaterMark Lesson 27.6 Watermarkly Lesson 37.6 eZy Watermark Lesson 47.4 Visual Watermark Lesson 57.4 PictStamp Lesson 67.3

Purpose: wmk is a Python command-line tool for adding image or text watermarks to images.
Batch processing: It can process folders recursively or accept glob patterns for batch watermarking.
Placement and opacity: Watermarks can be positioned at the top-left, top-right, bottom-left, bottom-right, or center, with opacity set from 0 to 100.
Input formats: The listed input and output formats are JPG, JPEG, PNG, WEBP, TIFF, BMP, and GIF.
GIF limitation: GIF processing handles only the first frame.
Dry run: A dry-run option prints planned outputs without writing files.
Local processing: The README describes the CLI as offline and says images stay on the user's machine.
Install: The package can be installed with pip or pipx, or from a repository clone.
Python requirement: The package metadata requires Python 3.10 or newer.
License: The repository provides the software under the MIT License, which permits use, copying, modification, distribution, sublicensing, and sale subject to its conditions.
Support channel: The package metadata links to the repository's GitHub Issues page.
Testing and checks: The README lists a pytest suite and Ruff lint and formatting checks as project trust signals.
Intended audience: The package metadata classifies the project for desktop end users and multimedia graphics.
Image formats: It supports JPG, JPEG, PNG, WEBP, TIFF, BMP, and GIF input and output.
Price from: Free

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