VisualizerApp v3

Turn any webcam into a classroom visualiser

VisualizerApp is a free online document camera app for teachers. Show books, worksheets, pupil work and practical demonstrations. Freeze, compare and annotate in your browser — no installation or account required, and core camera processing stays on your device.

Open VisualizerApp

For teachers to operate. Students should not use the app or Phone Camera. The core app is free and works with most visualisers and webcams.

No install
No account required
Local camera processing

VisualizerApp in 2026

Supporting teaching wherever it happens

Opted-in analytics recorded 900+ website sessions and 800+ VisualizerApp opens from January–August 2026.

900+recorded sessions
800+app opens

Activity counts, not unique users. See the privacy information.

Built for everyday classroom use

Open the app, allow camera access and start showing work without installing vendor software.

Show and explain

Put books, worksheets, worked examples and practical demonstrations under any webcam or visualiser. Freeze the view and annotate important details as you teach.

Compare and give feedback

Use split view, frozen frames and comparison tools to discuss different approaches, reveal answers and revisit earlier steps.

Focus and present

Use spotlight, reveal, grids, timers and measuring tools to direct attention. The optional paid Pro tools add a cleaner projector view and more features for richer lesson workflows.

Free to start, with optional Pro tools

The core document camera works without an account. Upgrade only if the additional classroom workflow tools are useful to you.

Free core app

Teach with the essentials

  • Live camera, freeze, annotation and image capture
  • Split view, timer, overlays and everyday classroom tools
  • QR Code Display, Celebration Mode and Last Setup
  • Capture and undo up to four examples from a paired phone
  • No account required

Optional Pro

Add richer classroom workflows

  • Presenter Mode, Comparison Overlay and Student Work layouts
  • Snip, Magnifier, more frames and longer recordings
  • Saved Setup, stop-motion interval capture and school branding
  • Watermark-free PDF/PNG output and PowerPoint export
Compare Free and Pro

Privacy by design

Straightforward for teachers and schools

Normal camera processing happens in your browser. The core app requires no account, and camera video or captured pupil work is not uploaded to VisualizerApp servers.

Optional services such as analytics, Pro activation, textbook search and wireless pairing are disclosed and only run when needed.

Read the privacy information

Document Camera Guides & Resources

Document Camera for Teachers

Practical classroom setups, camera choices, freeze frames, annotation, and student work capture.

Document Camera for Chromebook

What works well on ChromeOS, how to improve camera angle, and what to check for school rollout.

Use Your Phone as a Doc Cam

In settings where school policy permits, pair a phone as a wireless camera for a closer or more movable view.

Free Document Camera Software

What the free app includes, what Pro adds, and when a simpler camera viewer is enough.

Online Document Camera

How browser-based camera processing works, what stays local, and what still needs internet.

Document Camera Alternatives

A balanced look at webcams, phones, browser software, and dedicated document cameras.

VisualizerApp is a small, independent UK project built and maintained by one person. The core app is free, while optional Pro licences support hosting and continued development. Found an issue or have an idea? Use the feedback form.

FAQ

Yes. VisualizerApp turns a webcam into a browser document camera with freeze, annotation, split view, overlays, and capture tools.

Yes. The core app is free with no login required; optional paid Pro upgrades add extra tools. Camera processing is local in your browser – camera video isn’t uploaded to a server. Optional services are disclosed and only run when needed and with your consent.

Pro adds Presenter Mode, Student Work comparison layouts, Snip and Magnifier, higher limits, Saved Setup, stop-motion interval capture, watermark-free PDF and PNG output, PowerPoint export and school branding. QR Code Display, Celebration Mode, Last Setup and up to four phone captures remain Free. See the pricing page for the current comparison.

Yes. Where school policy permits, a teacher can pair a phone as a wireless camera by scanning a QR code. Students should not use Phone Camera. The teacher in charge should operate both devices and avoid showing faces, names or private surroundings unless needed for the teaching activity. A normal webcam or USB document camera remains fully supported.