Change Video FPS
Processing entirely on your device — large files may take a moment.
The fps filter resamples the frame timing: lowering the rate drops redundant frames (a 60→30 fps file halves in size with the same playback speed), while raising it duplicates frames to hit the target — playback speed never changes.
Common targets: 24 for a cinematic look, 30 for general web video, 60 for gaming and sports content. Audio is unaffected — it is sampled independently of video frames.
How to change video fps
- 1
Select your files
Drag & drop your MP4 files onto the area above, or click to browse. You can add multiple files at once for batch conversion.
- 2
Convert instantly
Click "Convert to MP4". The conversion runs entirely inside your browser using WebAssembly — no upload, no queue, no waiting.
- 3
Download results
Download each converted MP4 file individually, or grab everything at once as a ZIP archive.
About the MP4 format
MP4 (MPEG-4 Part 14) is the universal delivery container of digital video. It wraps H.264, HEVC or AV1 video with AAC audio, and its structure — separate metadata (moov) and media atoms — is what makes streaming, seeking and fast-start playback possible. Phones, cameras, TVs, browsers and every social platform assume MP4 first.
Quality is entirely a function of the codec and bitrate chosen at encode time, so an MP4 can be a 10 Mbps HEVC master or a postage stamp. That flexibility plus total playback coverage is why nothing has displaced it in twenty years — conversion between formats almost always ends in MP4.
+Strengths
- ✓Plays on every device and platform in existence
- ✓Streaming-ready structure (fast start, seeking)
- ✓Choice of modern codecs: H.264, HEVC, AV1
!Limitations
- −Quality depends entirely on encode settings
- −HEVC variants hit licensing gaps on some platforms
Frequently asked questions
Will raising fps make motion smoother?
No — duplicated frames carry no new motion. Raising fps only satisfies platforms that require a rate; real smoothness needs the original high-rate recording.
Does lowering fps lose quality?
Per-frame quality is identical — you simply keep fewer frames. Fast motion may look slightly less smooth, which is exactly the trade for the smaller file.
Why do platforms care about fps?
Players optimize for a known rate, and unusual rates (23.976, 50) can cause jitter on some devices. Standardizing to 30 avoids it entirely.