LED scrolling text in fullscreen
Type your text, choose color and speed and tap “Fullscreen” – your message runs across your phone in big glowing letters. Great as a sign in the crowd, at arrivals or in a parked car’s window.
How it is calculated
How to use the LED scroller
- Enter your text (up to 200 characters) and choose color, speed and text size. The preview updates instantly.
- Tap “Fullscreen” and hold your phone sideways – the text runs big across the whole screen.
- “Pause” stops it; tapping the screen exits fullscreen.
- “Share” gives you a link with your text and settings.
How it works
The text scrolls from right to left and then starts again. The speed is tied to the text height so the scroller stays similarly readable on phones and monitors. In fullscreen the page asks the browser to keep the screen awake (Screen Wake Lock) if it supports that.
Notes
- The text moves steadily and does not flash. Moving content can be paused at any time – as the WCAG accessibility guidelines require for moving content.
- Never operate or read it while driving. Illuminated signs in traffic may not be allowed.
- Whether the screen stays on is up to the browser; otherwise extend the auto-lock time in your settings.
Frequently asked questions
How do I make scrolling text on my phone?
Type your text, choose color and speed, tap “Fullscreen” and hold the phone sideways. The text then runs big across the screen.
Does the screen turn off during the scroller?
In fullscreen the page asks the browser to keep the screen awake. Not every browser supports this; then extend the lock time in your settings.
How long can the text be?
Up to 200 characters. Short messages with a few words are easiest to read from a distance.
Can I share my scroller?
Yes. Text, color, speed and size are in the link. Anyone who opens it sees the same scroller.
Does the text flash?
No. It runs smoothly without flashing and can be stopped at any time with “Pause”.
Sources and legal basis
- MDN Web Docs – Fullscreen API
- MDN Web Docs – Screen Wake Lock API
- W3C WAI – Understanding WCAG 2.2, SC 2.2.2 Pause, Stop, Hide
- W3C WAI – Understanding WCAG 2.2, SC 2.3.1 Three Flashes or Below Threshold
As of:
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