Video FPS Converter
Convert any browser-playable video to a different frame rate in your browser, then re-record it as WebM. No upload.
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What is Video FPS Converter?
The Video FPS Converter re-times a clip entirely in your browser: the source plays into a canvas that is sampled at the target frame rate, and a MediaRecorder turns the sampled stream into a WebM file. Lowering the fps drops frames for smaller, lighter files; raising it duplicates frames for smoother players that assume high frame rates. Because conversion happens in real time from the decoded video, the result stays in sync with the source picture, and the file never leaves your device.
Key Benefits
- Any browser-playable input: MP4, WebM, MOV and more
- Target frame rate from 1 to 120 fps
- Live frame-count estimate before you convert
- VP9 or VP8 WebM output via MediaRecorder
- Converted preview and download without leaving the page
Common Use Cases
- •Meeting an upload limit that caps frame rate, not just size
- •Converting 60fps phone footage to 30fps for smoother web playback
- •Reducing file size by dropping frames no one notices
- •Checking how a frame rate change looks before committing to it
- •Keeping private and client-side videos off any server
How to Convert a Video Frame Rate
- Choose the video: Pick any video file your browser can play — MP4, WebM, MOV and more. It never leaves your device.
- Read the estimates: Enter the target frame rate and check the live estimate: expected output frames and how many get dropped or duplicated versus the source.
- Convert: Click Convert. The clip plays once in real time while the canvas is sampled at the target rate — keep the tab visible until it finishes.
- Preview and download: Preview the converted WebM in the player, then download it. Lower fps means smaller files; higher fps means smoother motion.
Key Features
- Accepts any browser-playable input: MP4, WebM, MOV and more
- Target frame rate from 1 to 120 fps
- Live frame-count estimate before you convert
- VP9 or VP8 WebM output via MediaRecorder
- Converted preview and download without leaving the page
Frequently Asked Questions
How does the frame rate conversion work?
The clip plays once into a canvas that is sampled at the target frame rate, and a MediaRecorder encodes the sampled stream as WebM (VP9 or VP8). Lower target fps drops frames; higher fps duplicates them — the picture content stays identical to the source.
Which formats can I convert?
Any video your browser can play: MP4/H.264, WebM, MOV, MKV and more. The output is always WebM with VP9 or VP8 video, which every modern browser and most players support.
Does the conversion keep the audio?
No — this tool converts the picture only, and the output is a silent video. It is meant for frame-rate changes where the clip will be paired with music or narration afterwards.
How long does a conversion take?
About as long as the video itself, because the clip plays once in real time while being re-sampled. A one-minute clip converts in roughly one minute; keep the tab in the foreground so the browser does not throttle the canvas.