How to annotate a screenshot online
Drop a screenshot into the editor above, paste one straight from your clipboard with ⌘V, or press Upload a screenshot to choose a file. To move on to the next one, open File at the start of the top bar and pick Choose a new screenshot (⌘O); File info there shows its size and file details. The rest of the bar is the Snapix editor’s own: the tools sit in one tray — select, the shapes, text, the redact slot and spotlight, numbered steps, the pen and the highlighter — and the ⌄ at its end holds Measure and the emoji stickers. Pick a tool, then drag on the image to place it; the tray beside it changes with the tool, so the arrow shows its colour, width and style (Dart, Classic, Chevron or Sticker), text shows its size and dress, and the redact slot switches between Pixelate, Blur and Black with an Intensity slider. To turn a rectangle, ellipse, text or emoji sticker, select it and drag from just outside one of its corners, where the pointer becomes a curved arrow; hold Shift to turn it in 15° steps.
When it looks right, press Download for a PNG, or open the menu beside it for a JPG or to copy the finished image to your clipboard. The bar along the bottom acts on the whole picture: Rotate turns it 90° with every mark, Crop frames it — drag the edges or draw a region, then pick an output size to shrink it too — and on the right Share hands it to another app. In Chrome and Edge, Drag me drags the image straight into a chat, an email or your desktop, and Pin floats it in a small window that stays on top of everything else while you work.
What people annotate screenshots for
Bug reports and QA
A good bug report points at the problem. Add an arrow to a screenshot to mark the broken control, draw a rectangle around the region, and drop numbered steps to walk a developer through the reproduction in order. Deleting a step badge renumbers the rest automatically, so you can reorder without renaming everything.
Tutorials, docs and onboarding
For how-to content, the spotlight tool dims everything except the area that matters, which focuses a reader instantly. Pair it with the highlighter and short text labels — a Bubble label points at its subject on its own. When the shot itself needs to look presentation-ready, open the Background panel (the first tile in the bar) for a gradient, colour or blurred backdrop with padding, a soft shadow and rounded corners, or run it through our screenshot mockup for a browser or window frame.
Code reviews and feedback
Marking up a diff or a design mock is faster than describing it in words. Boxes, arrows and a couple of labels turn a vague comment into something unambiguous, and the measure tool reads off the exact pixel distance between two edges.
How to redact a screenshot properly
To blur part of a screenshot, choose the redact slot — the mosaic tile — and drag over the email, token or face you want gone; its picker switches between Pixelate, Blur and Black, and the Intensity slider sets how strong it is. To redact a screenshot for anything truly sensitive, be deliberate about it. All three are destructive — they are re-drawn into the exported pixels, with no hidden original layer beneath — but be honest with yourself about strength. Light pixelation over small text can sometimes be partly reconstructed, because the blocks still trace the shape of the letters underneath.
For real secrets — API keys, card numbers, addresses — use Black, which covers the area with solid black, or push the intensity all the way up. Then look at the exported result before you send it. If you need the text out of an image rather than hidden, our image to text tool reads it in your browser too.
A web version of the Snapix editor
This tool is the editor inside Snapix for Mac, rebuilt for the browser — the same bar of tools in the same order, the same four arrow styles with a curved-bend handle, spotlight, the redact slot with its intensity, emoji stickers, a pixel measure ruler, auto-numbered steps and the Background panel’s gradients, driven by the same single-key shortcuts. On the Mac it is one click from every capture (⌘⇧4, then Edit), adds Extract Text and auto-sized highlighting that read the words in your shot, exports at exact Retina resolution and pins a shot on top of every window.