What Is a Teleprompter and How Does It Work?
A teleprompter is a screen that scrolls your script one line at a time so you can read it while looking at the camera. This article explains how the scrolling cue works, how WPM pacing is calculated, and the four main types: browser software, glass rigs, overhead rigs, and studio units.
What is a teleprompter?
A teleprompter (also called an autocue in broadcast TV) is a prompting display that scrolls a script one line at a time. The text moves at a speed the speaker sets, usually measured in words per minute (WPM). The speaker reads the cue while keeping their eyes near the camera lens, which makes the delivery sound natural and direct instead of like someone reading a page. Broadcasters have relied on the same trick since the 1950s, and the Smithsonian traces the device from a 1948 butcher-paper scroll hidden in a suitcase to the glass rigs that stage modern conventions.
How does a teleprompter work?
The mechanics are simple. Script text sits in a scrolling viewport. Behind the scenes a timer moves the text upward at a steady pixel rate that tracks your WPM: the faster the words, the faster the scroll. A focus guide (a line or band near the middle of the screen) anchors where your eyes should land, and you read each line as it reaches the guide.
- Read-along motion: text scrolls smoothly rather than jumping.
- WPM pacing: the pace is calculated from your target words per minute.
- Manual control: pause, reset, nudge backward or forward a line, or jump to a section.
An online teleprompter does the same thing in a browser window, so there is no dedicated machine to buy. You paste the script, set the pace, and read straight from the screen, or from a second screen via a remote control companion.
Types of teleprompter explained
| Type | How it works | Best for |
|---|---|---|
| Online / software | A script scrolls in a browser or app on a laptop, tablet, or phone. | Creators, webinars, and anyone starting out |
| Teleprompter glass | A beam-splitter reflects the display in front of the camera lens. | Talking-head video with a fixed camera |
| Overhead rig | A flat display sits above the lens, text reversed to the camera. | Desk setups and podcasts |
| Hardware unit | Built-in display with foot-pedal or remote control. | News and studio production |
Teleprompter glass: the classic rig
When people ask "what does a teleprompter look like?", they usually mean the glass rig: a camera shoots through a sheet of glass while a monitor reflects the script off it. The speaker reads the reflection while the camera captures the scene straight through the glass. The text is mirrored (flipped horizontally) so the reflection reads forward. Mirror mode does exactly this in an online prompter.
Do you need one to start?
No. The most common type today is the online teleprompter, because a phone or laptop is always nearby. You get the full read-along prompt free in the browser, with pacing, focus guides, countdown, fullscreen, and mirror modes. It covers the capabilities most creators actually use — a studio unit mainly adds the physical rig, software controller, and support.
Frequently asked questions
What is a teleprompter?
A teleprompter is a display that shows a script as scrolling text so a speaker can read their lines while looking toward the camera or audience.
How does a teleprompter work?
Text scrolls upward (or is flipped in a mirror) at a steady pace. The speaker reads against a focus guide line while their eyes stay near the lens.
What is teleprompter glass?
Teleprompter glass is a beam-splitter that reflects the display in front of the lens. The speaker reads the reflection while the camera films straight through it.
Do I need a physical teleprompter?
No. A free online teleprompter in your browser handles the same scrolling cue on a laptop, tablet, or phone. No hardware required.