Annotate an image
Draw arrows, boxes and text on a screenshot, and blur out anything you don’t want seen. Everything happens in your browser — the file is never uploaded.
How it works
1 · Open your image
Drop in a screenshot or photo. It is read straight from your disk into the page.
2 · Mark it up
Point at things with arrows and boxes, add a note with the text tool, and blur anything private.
3 · Download
Save a PNG with your marks baked in. Nothing left your device at any point.
Questions
Is my screenshot uploaded anywhere?
No. The image is opened directly in your browser and the drawing happens on your own device. Nothing is sent to our servers, and closing the tab discards it.
Can I really hide sensitive details with the blur tool?
Yes. The blur is applied to the actual pixels and baked into the file you download, so the original detail is not recoverable from the saved image. Drag a box over anything you want hidden.
Can I undo a mistake?
Yes. Undo steps back through the last 15 marks, and "Remove all marks" returns you to the untouched image.
Common questions
Are my images uploaded when I annotate them?
No. Annotation happens entirely in your browser, which makes this safe for screenshots containing private or work information.
Can I blur out sensitive information permanently?
Yes. The blur is applied to the image pixels themselves, not laid over as a removable layer, so the original detail is gone in the downloaded file.
What is the maximum image size?
Large screenshots and photos work fine. The limit is your device's memory, so extremely large images may be slow on older phones.
Can I undo an annotation?
Yes. Each annotation can be undone step by step, so you can experiment without starting over.
What format is the download?
Annotated images download as PNG, which keeps text and lines sharp. PNG is lossless, so files are larger than JPEG but nothing is blurred by compression.