Annotate Image Online
Mark up screenshots and photos with arrows, rectangles, highlights, and text notes. It is designed for bug reports, instructions, reviews, tutorials, and visual feedback.
Upload an image and drag on the canvas to annotate it.
Mark up screenshots, photos, and documents
Multiple annotation modes
Use arrows for direction, rectangles for areas, highlights for emphasis, and text for direct notes.
Fast visual feedback
Create clear annotated images for customer support, QA reports, design review, and how-to content.
Runs in the browser
Your image is processed locally with Canvas and can be downloaded without server-side image handling.
How it works
- 1
Upload source image
Open the image you want to explain, correct, or review.
- 2
Choose a mark type
Pick arrow, box, highlight, or text, then drag or click on the image.
- 3
Export annotated image
Download the final PNG or JPG and attach it to your message, article, or report.
When to annotate an image
Image annotations reduce back-and-forth when explaining a screen, product issue, map, form, or visual requirement. Use boxes for regions, arrows for exact targets, highlights for text lines, and short labels for context. Keep the final image readable by limiting the number of marks.
Frequently asked questions
Can I annotate screenshots online?
Yes. Upload the screenshot, choose an annotation mode, and drag directly on the image.
Can I undo an annotation?
Yes. Use Undo for the last mark or Clear Marks to remove every annotation.
Is this suitable for bug reports?
Yes. The tool is useful for marking UI issues, form fields, visual defects, and exact steps in QA notes.
Annotate Image Online last reviewed: Jul 13, 2026.