24 / 30 / 60 fps
Frame rate converter for 24, 30 and 60 fps
Convert between 24, 30 and 60 fps. Dropping from 60 to 30 roughly halves the motion data the encoder has to store, and most editors prefer a consistent rate to work with.
Files are processed on your device · nothing is uploaded, stored or logged
How it works
Pick your file. The browser reads it straight from disk. There is no upload progress bar, because there is no upload.
The encoder loads once. A WebAssembly build of FFmpeg, around 30 MB, downloads the first time you use the site and stays cached afterwards.
Your processor does the work. Everything happens in this tab, at roughly half of real time on a modern laptop.
Save the result. The finished file is assembled in memory and handed to your downloads folder.
Why frame rate causes so many problems
Phones and screen recorders often record at a variable frame rate, speeding up and slowing down to save power. Editors assume a constant rate, which is why footage that plays fine in a media player drifts out of sync the moment it lands on a timeline.
Forcing a fixed frame rate solves that class of problem outright. The tool resamples the video to a constant rate, dropping or duplicating frames as needed.
It also affects size. Halving the frame rate roughly halves how much motion the encoder has to describe.
What you cannot do
Converting 30 fps footage to 60 fps does not make it smoother. The tool duplicates existing frames rather than inventing new ones, so motion looks identical while the file gets larger. Genuine frame interpolation exists but is far too heavy to run in a browser tab.
Halving the frame rate halves the data the encoder must store. To work out the resulting size, use the bitrate calculator.
Common questions
Will 60 to 30 look choppy?
Slightly less smooth in fast motion. For most footage, especially talking-head video, the difference is hard to notice.
Does this fix audio drift in my editor?
Usually yes. Variable frame rate is the most common cause of progressive desync.
Should I use 24 fps?
Only if you want the film look. It is a stylistic choice, not a technical improvement.
Do my files get uploaded?
No, everything happens locally.