How to annotate a screenshot
- Open the image, drop it onto the box, or paste a screenshot with Ctrl+V.
- Pick a tool. The arrow is selected first, in red, because pointing at something is the most common job.
- Draw arrows, boxes, circles or freehand marks, and click with the Text tool to add a note.
- Draw a pixelate box over anything that should stay private.
- Save a PNG or JPG, copy the result as an image, or save a PDF.
The saved file is cropped to the image and has the same size in pixels, so it looks like the original with your marks on top. Marks you draw past the edge of the picture are cut off.
The tools at a glance
- Arrow and line point at a button, a number or a mistake. Hold Shift for straight angles in 45-degree steps.
- Rectangle and ellipse frame an area. Filled gives them a light tint, so the text below still shows.
- Pen and highlighter for freehand marks. The highlighter is see-through and starts in yellow.
- Text in three sizes, in any color. Double-click a text with the Select tool to change it.
- Pixelate hides names, email addresses, faces or account numbers under large squares.
- Select moves and resizes marks; the image itself stays in place, so you cannot shift it by accident.
Hiding private information properly
Before you send a screenshot to support, a colleague or a forum, look for what does not belong there: email addresses, phone numbers, order and account numbers, names in a chat, tabs and bookmarks at the top of the window. Cover each one with a pixelate box that is a little larger than the text itself. Small squares over a short word can sometimes still be guessed from the shape, so prefer boxes that cover the whole line. To black something out completely instead, pick black and the thick pen and scribble over it until no letter shows.
The pixelated squares are baked into the saved PNG, JPG or PDF. The original pixels under them are not part of the file. The image you opened is not changed, because the page never writes back to it.
Your image stays on this device
The page opens the picture in the browser and keeps your work in this browser's storage, so a reload does not lose it. Nothing is uploaded. Very large photos are scaled down to 4096 pixels on the long side when they open, to keep the page quick on phones. If you need to shrink the result further, the image compressor makes the file smaller, and the image cropper cuts it to the part that matters.
When the whiteboard is the better fit
This page is built around one picture. To put several screenshots side by side, sketch around them or explain something from scratch, use the whiteboard: it has the same tools on an endless board, plus backgrounds, a laser pointer and board files you can open again. For a caption on a photo with your own font and an outline, use add text to image, and pixelate image turns a whole photo into a mosaic or pixelates only the areas you draw over, with a block size you choose.
Related guides
- How to Write Alt Text: Rules, Examples and Empty Alt
- JPG vs PNG vs WebP vs AVIF: Which Format to Use
- How to Compress a Photo Under 100 KB
Frequently asked questions
Is my screenshot uploaded?
No. The image opens in your browser and the marks are drawn on your device. The saved file is made in the browser too, and nothing is sent to a server.
Does the saved image keep the full resolution?
Yes, up to 4096 pixels on the long side. Larger images are scaled down to that size when they open, which still covers screenshots from most screens. The saved PNG or JPG has the size of the opened image.
Is pixelating safe for hiding private details?
The squares replace the pixels in the saved file, so the original text is not stored in it. Keep the squares large enough that nothing can be guessed: cover the whole line, not only a few letters, and check the saved image before you send it.
Can I paste a screenshot instead of opening a file?
Yes. Click on the page once and press Ctrl+V, or Cmd+V on a Mac. You can also drop the image file onto the box.
PNG or JPG: which one should I save?
PNG for screenshots, because text and thin lines stay sharp. JPG for photos, because the file is much smaller. Copy image puts a PNG on the clipboard for pasting into a chat or an email.
Can I add a second image, like a logo or an arrow sticker?
Yes. Paste or drop another image after the first one; it lands on top and can be moved and resized like any other mark. Open another image starts over with a new picture.