Can I undo my drawings on the screenshot?

Yes. The tool has undo and redo buttons so you can easily correct any mistakes while marking up your image.

Are my screenshots uploaded to a server?

No. Your images are loaded and edited entirely on your device. When you download the final image, it saves directly to your computer. Nothing is ever uploaded.

What image formats can I use?

You can load any JPG, PNG, or WebP file. The final annotated image will download as a PNG.

How do I hide private information?

Use the Redact tool. It draws a solid block over any area you select, which is perfect for covering up passwords, emails, or personal details.

Annotate Screenshot Online Free | Draw & Highlight Images

What is an Image Annotator?

An image annotator allows you to draw directly on top of a picture. You can add arrows to point things out, draw boxes to highlight specific areas, add text for context, or use solid blocks to hide sensitive information. People use these tools when creating a bug report, writing a tutorial, or giving feedback on a design.

This tool works entirely within your browser. You can open any image, add your markup, and download the result immediately. You do not need to sign up or wait for files to upload.

How to Use

Open your image: Paste a screenshot directly from your clipboard, drag and drop a file, or click to browse your folders.
Pick a tool: Choose the Pen, Rectangle, Text, or Redact tool.
Mark it up: Draw directly on the image canvas. You can undo any mistakes you make.
Download: Save the final image as a PNG so you can share it or attach it to an email.

Tools Included

Pen: Freehand drawing for quick circles, underlines, or rough highlights.
Arrow: Draw a straight line with an arrowhead to point exactly at what matters.
Rectangle: Draw an outline around a section of text, an interface element, or a paragraph.
Text: Type out labels or instructions right onto the image.
Redact: Place a solid black block over any area to hide private data like passwords and messages.

Use Cases

Bug reports: Mark exactly which part of the screen is broken, add a note explaining the issue, and attach it to your bug tracker.
Design feedback: Circle confusing areas on a mockup and draw arrows to suggest improvements.
Technical tutorials: Highlight each step in a guide with numbered labels to help people follow along.
Customer support: Show users exactly where they need to click by sending them a clearly marked screenshot.
Content redaction: Hide sensitive information before sharing a screenshot publicly.

Why Use This

Many online screenshot tools upload your images to their own cloud servers for processing. If you are working with internal company software, bug tickets with confidential details, or personal conversations, uploading is a big privacy risk.

This tool does all the work locally on your device. Your screenshot never leaves your computer. It is also completely instant because there are no upload queues or compression delays.