Local · Private · Free

Image Annotator

Drop a screenshot and mark it up instantly: arrows, boxes, numbered steps, text, highlighter, and baked-in blur. Every edit happens entirely on your device, nothing is ever uploaded.

Drop an image here
click to browse, or just press Ctrl+V to paste a screenshot

Files never leave your browser

0 annotations Del remove Ctrl+Z undo Shift straight / square

Remember session

Quality 90

Everything runs locally, your image is never uploaded. Blur & pixelate are baked into the exported pixels, not a removable overlay.

Annotate like a pro, without sending your screenshot anywhere

Every arrow, box, badge and stroke is an editable object: switch to Select to move, restyle or delete anything, and undo/redo freely. Step badges auto-number themselves, the highlighter multiplies like a real marker, and blur/pixelate regions destroy the underlying pixels on export. Export full-resolution PNG or JPG, or copy straight to your clipboard. Completely free, completely private, works offline.

About Image Annotator

Image Annotator is a free, private browser tool for marking up screenshots and images. It runs entirely in your web browser. Drop in any image and add arrows, boxes, text labels, numbered step badges, a highlighter, and blur or pixelate regions. Because everything happens locally on your device, your files are never uploaded to a server. There is no sign-up and no installation required. It keeps working offline. Like every free tool by Digital Heroes, it is 100% free with no limits.

What you can do

Draw arrows and lines to point at key areas in any screenshot.

Add numbered step badges that auto-increment for quick step-by-step guides.

Place text labels with a custom font size and color anywhere on the image.

Blur or pixelate regions to redact sensitive information before sharing.

Highlight passages with a translucent marker stroke.

Export full-resolution PNG or JPG, or copy the result straight to your clipboard.

How to use Image Annotator

Open Image Annotator in your browser, with no signup required.

Drag and drop your image (or click to browse, or press Ctrl+V to paste a screenshot). It never leaves your device.

Pick a tool from the toolbar: arrow, box, text, badge, highlighter, or blur. Draw on the image.

Download as PNG or JPG, or copy to your clipboard. Free, fast, and private.

Frequently asked questions

Is Image Annotator free?

Yes, Image Annotator is completely free for everyone. No sign-up, no account and no usage limits.

Is it private? Are my files uploaded anywhere?

No. Image Annotator runs entirely in your browser on your own device, so your data never leaves your computer and nothing is uploaded to a server.

Does it work offline?

Yes. This tool is a Progressive Web App, once the page has loaded it keeps working offline, and you can install it as an app from your browser.

Do I need to install anything or create an account?

No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.

What does Image Annotator do?

It lets you mark up screenshots with arrows, boxes, text, numbered step badges, a highlighter, and blur or pixelate regions. Every edit is non-destructive until you export. Download the result as PNG or JPG, or copy it to your clipboard.