Client-side · No upload · Built for documentation

Annotate Images for Documentation — Local Screenshot Markup

Number tutorial steps, name UI controls, and ship clearer help articles — labeled callouts on a local canvas, with zero server upload.

Annotate a Screenshot — Free

No account · No server · Instant export

What this tool does

  • Click-to-place labeled pin markers
  • Drag markers to reposition on the canvas
  • Edit tag labels in the Inspector panel
  • Flatten and download or copy to clipboard
  • Optional EXIF metadata stripping before export

Built for docs, not illustration

Image Annotator places labeled pin markers — not freehand arrows, shapes, or Figma-style drawing. For the jobs technical writers actually need (step-by-step guides, UI references, release notes), callouts with text labels are faster to place and stay legible when embedded in help centers.

Why documentation teams annotate locally

Cloud markup tools upload your screenshot before you mark a single pixel. Pix-8 keeps processing on-device — the right model when you need to annotate images for documentationthat include staging URLs or unreleased product UI.

Docs stay private

Screenshots of unreleased UI, internal tools, and staging environments never leave your machine — no cloud upload before markup.

Publish-ready in seconds

Skip the upload pipeline. Click to place a callout, type a step label or control name, and export a flattened PNG for your help article.

Clear in tutorials

Labeled pin markers stay sharp when embedded in docs — clearer than freehand arrows on dense interface screenshots.

How it works

  1. Step 1

    Capture the screen

    Take a screenshot of the UI you are documenting, then open it in the Image Annotator — loaded locally via the browser File API.

  2. Step 2

    Label each step

    Click the control or area you are explaining, add a short label (button name, step number, setting name), and drag the marker to the exact pixel.

  3. Step 3

    Embed in your docs

    Flatten and download or copy one image with all callouts baked in — paste into Notion, Confluence, GitBook, or any CMS.

Frequently asked questions

Is this tool suited for technical documentation screenshots?

Yes — for numbering tutorial steps, naming UI controls, and flagging areas in help articles. Image Annotator places labeled pin markers on screenshots. It does not include freehand drawing, arrows, shape tools, or collaborative cloud editing.

Are documentation screenshots uploaded to a server?

No. All markup runs on a client-side canvas in your browser. Your file is read locally and is never transmitted to Pix-8 or any third-party server — important when docs include staging URLs or unreleased product UI.

How is this different from annotating inside Notion or Confluence?

Built-in editors often require uploads and offer limited markup. Pix-8 flattens labeled callouts into a single portable image you can embed anywhere — fast, free, and fully local, with no account required.

Related use cases

Ready to annotate your next doc screenshot?

Open the Image Annotator, label your first UI element, and embed a flattened image in your help article — privately, on your device.

Open Image Annotator

Client-side canvas only — your image never leaves the browser.