ScreenMark is a fast, browser-based screenshot annotation tool designed for anyone who needs to communicate visually — without the friction of heavy desktop software. Whether you're a developer filing a bug report, a designer reviewing a mockup, a support agent walking a customer through a problem, or a teacher highlighting key content, ScreenMark gives you everything you need in seconds.
The workflow is simple: paste a screenshot directly from your clipboard, mark it up using a rich set of annotation tools — arrows, text labels, rectangles, circles, highlights, freehand drawing, pin markers, blur and redact regions — and then copy the finished image right back to your clipboard with a single click. ScreenMark does not extract text, run OCR, or send screenshots to AI services. The Windows desktop app opens the editor with your capture already pasted; markup you make there stays on this PC and is not saved to cloud history.
ScreenMark is built for speed. Every tool has a single-key keyboard shortcut so your hands never have to leave the keyboard. Export & Copy writes a history item you can reopen for a limited time. The canvas supports smooth zoom and pan so you can annotate pixel-perfect details on large, high-resolution screenshots.
Advanced features like the eyedropper color picker, numbered pin markers for ordered callouts, the arrow-with-text tool for inline labels, and both pixelated and solid-fill redaction modes make ScreenMark a genuinely powerful tool while keeping the interface clean and distraction-free.
ScreenMark is built and maintained by Patten Labs, a small software studio focused on creating practical, no-nonsense tools for everyday workflows. We believe great software should feel invisible — it should just work, quickly, every time.