Browser-native · Client-side · No upload

Browser-Based Image Annotator — Private Screenshot Markup

Annotate screenshots entirely in your browser — labeled pin callouts on a local canvas, no install, no account, and zero server upload.

Open Annotator — Free

No install · 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

Browser-based, not cloud-hosted markup

Image Annotator runs in the tab on a client-side canvas — not a remote editor that copies your file to a server first. It places labeled pin markers, not freehand arrows, shapes, or collaborative layers. For screenshot feedback and tutorials, callouts with text labels open fast and export without a round-trip upload.

Why use a browser-based image annotator?

Most online annotators route your file through a remote server before you mark anything. Pix-8 keeps every step in the browser — the core advantage of a browser-based image annotator that processes screenshots locally with no install required.

No install, no account

Open a tab, load your screenshot, and start marking — no extension, desktop app, or sign-up wall before your first callout.

Client-side by default

Markup renders on a local canvas in the browser. Your screenshots, mockups, and internal assets never touch a cloud server.

Export without upload latency

Place labeled callouts, edit text in the Inspector, and flatten one shareable image in seconds — no queue, no round-trip.

How it works

  1. Step 1

    Open in your browser

    Navigate to Pix-8 Image Annotator and load a screenshot or photo — the file stays on your device via the browser File API.

  2. Step 2

    Place labeled callouts

    Click to add a pin marker, type a short label, and drag to reposition on the canvas — all processed client-side in the tab.

  3. Step 3

    Flatten and share

    Download or copy a single flattened image with every callout baked in — ready for Slack, tickets, email, or docs.

Frequently asked questions

What does browser-based image annotation mean?

All markup runs in your web browser on a client-side canvas — no desktop install, no account, and no file upload to a server. Image Annotator places labeled pin markers on screenshots. It does not include freehand drawing, arrows, shape tools, or cloud collaboration.

Are my images uploaded when I use this browser annotator?

No. Your file is read locally via the browser File API and processed on-device. It is never transmitted to Pix-8 or any third-party server — the core privacy advantage of a browser-based image annotator that keeps markup client-side.

How is this different from a browser extension or cloud markup app?

Extensions often require install permissions; cloud apps upload your screenshot before you annotate. Pix-8 runs entirely in the tab, flattens labeled callouts into one portable image, and exports in seconds — free, with no server round-trip.

Related use cases

Ready to annotate in your browser?

Open the Image Annotator, place your first labeled callout, and export a flattened screenshot — privately, with no install and no upload.

Open Image Annotator

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