Screenshot Annotator
Annotate screenshots directly in your browser. Draw arrows, rectangles, freehand, add text labels, blur/pixelate areas, then export as PNG.
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Paste or upload a screenshot to annotate with arrows, rectangles, text, blur, speech bubbles, magnify lens, spotlights, stamps, and more. Perfect for bug reports, tutorial screenshots, and design feedback — all processed locally in your browser with no uploads.
Upload any image and mark it up with our full annotation toolkit. Draw arrows, add text labels, place stamps, create spotlights, add comic-style speech bubbles, and magnify details. Great for photo markups, diagram annotations, educational visuals, and collaborative design reviews — 100% client-side, no data ever leaves your device.
Drop a screenshot here
Supports PNG, JPG, WebP — or paste from clipboard (Ctrl+V)
Select a tool and start annotating
How to use Screenshot Annotator
- Drop, paste, or browse to load a PNG, JPG, or WebP screenshot.
- Select a tool (arrow, rectangle, text, blur, or freehand) and adjust color and stroke width.
- Annotate on the canvas, then click Export PNG to download the result.
What is Screenshot Annotator?
Whether you are documenting a bug, creating a tutorial, or reviewing a design mockup, the Screenshot Annotator lets you mark up images quickly. Choose from five annotation tools — arrow, rectangle, text, blur (pixelate), and freehand pen — each with adjustable color and stroke width. Everything runs entirely in your browser via the HTML5 Canvas API; your image never leaves your device.
Use the color picker to switch between preset colors (red, blue, green, black, white) or pick a custom shade. Adjust stroke width from 1px to 6px for fine or bold markings. Undo removes the last annotation, Clear All wipes everything, and Export PNG downloads the annotated screenshot at full resolution.
FAQ
- Does my image get uploaded?
- No. Everything runs in your browser using the Canvas 2D API. Your image never leaves your device.
- Can I edit or move annotations after placing them?
- Not yet — each annotation is placed permanently. Use Undo to remove the last one, or Clear All to start over.
- What image formats are supported?
- PNG, JPEG, and WebP. The exported output is always PNG at full resolution.
- Can I paste an image from the clipboard?
- Yes — copy a screenshot to your clipboard and press Ctrl+V while on the page.
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