Online Screenshot Editor
Annotate any screenshot with arrows, boxes, text, highlights, step numbers, blur, and crop. Free, in the browser, with nothing uploaded.
- 100% free
- No upload, runs in your browser
- No signup
- No watermark
How to annotate a screenshot online
Mark up a screenshot with arrows, text, and blur in four quick steps, no app install required.
Load the screenshot
Drag the image in, paste with ⌘V / Ctrl+V, or click the drop zone to choose a file.
Pick a tool
Choose arrow, box, ellipse, pen, highlighter, text, step number, blur, or crop from the toolbar.
Draw on the image
Click and drag on the canvas. Use undo/redo to fix mistakes, and switch colors or stroke width any time.
Export
Download the annotated screenshot as a PNG or copy it straight to your clipboard.
What this tool does
- Arrow, line, rectangle, ellipse, freehand pen and highlighter tools
- Text labels and auto-numbered step badges for tutorials
- Blur or pixelate regions to hide sensitive details
- Crop, undo/redo, and adjustable colors and stroke widths
- Export as PNG or copy to clipboard. No upload, no signup
Like the editor? It lives in an app.
Pizazoo for macOS has a full native markup editor plus AI organization for every screenshot you take. On-device, private, free to try.
Frequently asked questions
How do I annotate a screenshot online?
Drop the screenshot on this page (or paste it with ⌘V / Ctrl+V), pick a tool from the toolbar, and click and drag on the image: Arrow and Box to point things out, Highlight for text, Text for labels, and Step 1·2·3 for numbered callouts. When you are done, download the PNG or copy it to your clipboard.
How do I add an arrow to a screenshot?
Arrow is already selected when the editor opens. Press where the arrow should start and drag to the spot it should point at; the arrowhead is drawn where you let go. Pick a color and a Thin, Medium, or Thick stroke before you draw, and use Move to drag the arrow somewhere else afterwards.
How do I add text to a screenshot?
Choose Text, click (or tap) where the label should start, type, and press Enter. The stroke setting doubles as the font size, so choose Thin, Medium, or Thick first, and pick a color that stands out against the screenshot.
Is this screenshot editor free, with no watermark?
Yes. It is free online with no account, no watermark, and no limit on how many screenshots you edit. Exports are full resolution, and the image never leaves your device.
Is this a real editor or do I need to install something?
It is a full canvas editor that runs in your browser tab. Nothing is installed and nothing is uploaded. The image is processed locally on your device.
Can I add numbered steps for a tutorial?
Yes. The step-badge tool places auto-incrementing numbered circles. Click in sequence to mark step 1, 2, 3 on the screenshot.
Is blur safe for hiding passwords or keys?
Not always. Light blur can sometimes be reversed, and so can weak pixelation. For passwords, keys, or account numbers, use our dedicated redaction tool instead: its default Blackout style covers the area with a solid box, which is safer than any blur.
Why does the exported image look sharper than the preview?
The preview is scaled to fit your window, but exports render at the original pixel resolution of your screenshot, so nothing is lost.
Can I mark up a screenshot on iPhone?
Yes. iPhone has Markup built in: take a screenshot and tap Markup at the top of the full-screen preview (iOS 26 and later; on earlier versions, tap the thumbnail in the lower-left corner), or open the screenshot in Photos and tap Edit, then Markup. This editor also works in Safari on iPhone and iPad, where you draw with your finger, and it adds blur, pixelate, and numbered step badges.
Can I edit screenshots like this automatically on a Mac?
Pizazoo for macOS includes this same kind of markup editor natively, plus automatic organization, OCR search, and redaction. All offline.