A private teleprompter: local-first, no sign-in, runs in your browser
June 21, 2026 · 5 min read
Most teleprompters want an account and store your scripts in their cloud. Here's why a local-first teleprompter — no sign-up, script kept in your browser, optional on-device voice — is a safer default.
Why does a teleprompter need my account?
Open most teleprompter tools and the first screen is a sign-up form. The reason is rarely about your reading experience — it's about syncing scripts to a server, attaching them to a profile, and metering a subscription. Useful for the vendor; not necessary for the simple act of reading words off a screen.
letter maps takes the opposite stance. There is no account and no sign-in. You land on the app, paste a script, and start. Nothing about the core experience depends on a server knowing who you are.
What “local-first” actually means here
Local-first means your data lives on your device by default, not in someone else's database. In letter maps, the script you paste and your settings are saved in your browser's localStorage. They persist between visits on that browser, and they never travel to a server — there is no backend storing them.
Practical consequences of that choice:
- No account to create, confirm, or have breached.
- Your script isn't sitting in a vendor's cloud waiting to be indexed, analysed, or leaked.
- Clear your browser data and it's genuinely gone — there's no server copy.
- It keeps working the same whether the company behind it is up, down, or gone.
The honest caveat: voice audio
There is one nuance worth stating plainly, because many tools don't. Voice-following uses the browser's Web Speech API. By default, Chrome processes microphone audio in the cloud — so in that default, your audio (not your script) is sent to a speech service for transcription. That's true of most browser voice features, and many teleprompters simply never mention it.
letter maps mentions it, and gives you a fix: an on-device mode (Chrome 139 and later) that runs recognition locally after a one-time language-pack download. In on-device mode the audio never leaves your machine, and voice-following keeps working with no internet at all. Prefer not to use voice? Auto-scroll mode uses no microphone whatsoever.
Who local-first is for
If you're reading a product announcement, legal statement, investor update, medical script, or anything you'd rather not upload to a third party, the calculus is simple: the fewer places your words travel, the smaller the risk. A teleprompter that keeps the script on your device and can keep the audio there too is a sensible default for sensitive material — and a perfectly good default for everything else.
FAQ
- Is there a teleprompter that doesn't require sign-up?
- Yes. letter maps needs no account or sign-in — you open it in a browser and start reading. Your script is saved only in your browser, not on a server.
- Where does letter maps store my script?
- In your browser's localStorage on your own device. There is no backend database, so the script is never uploaded. Clearing your browser data removes it completely.
- Can a browser teleprompter keep my voice private?
- By default Chrome transcribes microphone audio in the cloud. letter maps offers an on-device mode (Chrome 139+) where recognition runs locally and audio never leaves your machine; auto-scroll mode uses no microphone at all.
- Does it work offline?
- Auto-scroll works offline always. Voice-following works offline in on-device mode once the language pack is installed.
Related: Accurate voice-following for accents & offline, letter maps vs CuePrompter