Understand why TimerCountUp exports WebM, how transparency works, and what to do when an editor expects another format. This guide focuses on a repeatable workflow and the settings that matter most in real projects.
Why the tool uses WebM
Modern browsers can record video directly using web media technologies, and WebM is a natural output format for this workflow. It is efficient for web use and can support alpha transparency, which is important for overlays.
Transparency depends on the full workflow
A file can contain transparency while an editor or converter ignores it. If alpha matters, test the actual destination software before creating many long exports. Ordinary MP4 workflows typically do not preserve alpha in the same simple way.
When conversion is necessary
If your editor cannot import WebM, convert a copy to a format it supports. For solid-background timers, an ordinary MP4 conversion is straightforward. For transparent overlays, choose a conversion format and settings that explicitly preserve alpha.
Keep the original file
Retain the WebM master even if you convert it. The original preserves the browser-generated output and gives you another source if future software handles the format differently.
Browser and device considerations
Recording support and performance vary across browsers and devices. Desktop Chromium-based browsers are generally a practical choice for long or high-resolution recordings. Always test a short export before committing to a long timer.
Build the timer in TimerCountUp
Open the TimerCountUp generator and configure the timer for the project before recording. The preview lets you verify the mode, duration, format, style, color, background, animation, resolution, and frame rate before creating the video. Because the recording is generated in the browser, the workflow is designed for quick one-off assets as well as reusable timer libraries.
What to check before publishing
Watch the finished timer at the actual size viewers will see. Confirm that the first and last seconds behave as expected, the digits remain readable over the real background, and the file starts exactly where the edit or scene needs it. If the timer will be reused, keep the original WebM and note the settings so the same visual can be regenerated at another duration.