What tools are available for marking up an image?

Pen for freehand drawing, rectangles for boxing an area, and arrows for pointing something out — the common annotation tools for feedback and documentation.

Can I undo a mistake while annotating?

Yes, you can undo recent marks rather than needing to start over from scratch.

Does this work well for annotating screenshots specifically?

Yes, that's one of the most common uses — marking up a screenshot to report a bug, give design feedback, or explain a step visually.

Does Image Annotator upload my files to a server?

No. Image Annotator runs entirely in your browser using on-device processing, your files never leave your device.

Image Annotator

Draw, highlight and mark up an image or screenshot with pen, rectangle and arrow tools.

Runs in your browser

Drop an image here

Choose File

About this tool

Marking up a screenshot or image — circling a bug, highlighting a section, adding an arrow pointing to something specific — is a routine part of giving feedback, writing documentation, or explaining an issue visually. This tool lets you draw, highlight and mark up an image or screenshot with pen, rectangle and arrow tools, giving you quick annotation without opening dedicated screenshot or design software.

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