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FPS Converter: Change Video Frame Rate Online

Upload a video, pick a target frame rate, and download it converted. This free FPS converter handles 60, 30, and 24 FPS, and can interpolate 24 to 60 FPS for genuinely smoother motion. Everything runs locally in your browser via FFmpeg.wasm, so nothing is uploaded, nothing is watermarked, and there is no sign-up.

Drop a video here or click to upload

MP4, MOV, WebM, MKV — up to 200 MB

How to Change Video Frame Rate (FPS) Online

Frame rate (FPS, frames per second) determines how smooth motion looks in a video. Cinema is traditionally 24 FPS, broadcast TV is 30 or 60, gaming targets 60-144, and slow-motion footage is captured at 120-240 then played back at 30-60 to create the slow-mo effect. Converting between frame rates is a common task — for matching platform requirements, reducing file size, smoothing low-FPS footage, or syncing multiple clips.

Simple vs Smooth

Simple mode uses FFmpeg's built-in frame rate filter, which drops frames when going to a lower rate and duplicates them when going higher. It's fast (close to real-time) and produces predictable results. The downside: going from a lower FPS to a higher FPS in Simple mode doesn't actually make motion smoother — it just plays the same frames repeated.

Smooth mode uses FFmpeg's minterpolate filter with motion-compensated interpolation. It analyzes motion between consecutive frames and constructs synthetic in-between frames — giving a genuine smoothness boost when upsampling (24 → 60 FPS, for example). This is the same technique TVs use for "motion smoothing," and it can produce striking results. The cost: it's 10-50x slower than real-time and memory-intensive, hence the file size and duration caps.

Common conversions

  • 60 → 30 FPS — halve file size for sharing. Use Simple mode.
  • 25 → 30 FPS — PAL to NTSC. Simple mode is fine; Smooth gives slightly better motion.
  • 24 → 60 FPS — smooth out cinematic footage. Use Smooth mode.
  • 120 → 30 FPS — high-speed capture to standard playback (no slow-motion effect; for that, change the timebase instead). Use Simple mode.
  • 30 → 24 FPS — give footage a cinematic feel. Simple mode.

Need to also trim or convert format?

Pair this tool with our Video Trimmer to cut a clip before processing, or our MP4 to GIF converter to turn the result into a shareable GIF.

Frequently Asked Questions

Is this FPS converter really free?+
Yes — completely free, with no sign-up, no upload, and no watermark. The conversion runs entirely in your browser using FFmpeg.wasm, so your video never leaves your device and there's no file-size paywall on Simple mode.
How do I convert a video to 60 FPS?+
Upload your clip, set the target frame rate to 60, and pick a mode. If your source is already 60 FPS or higher, Simple mode is near-instant. If you're upsampling from 24 or 30 FPS and want genuinely smoother motion, choose Smooth mode, which interpolates new in-between frames.
Can I convert 60 FPS to 120 FPS?+
Yes. Set the target to 120 and use Smooth mode so FFmpeg interpolates the extra in-between frames — Simple mode would only duplicate frames without adding smoothness. Smooth mode is slow and capped at 100 MB and 120 seconds in the browser, so for long 120 FPS renders desktop FFmpeg is faster.
What's the difference between Simple and Smooth modes?+
Simple mode drops or duplicates frames to hit your target rate. It's fast and works for any clip. Smooth mode uses motion interpolation — FFmpeg's `minterpolate` filter generates new in-between frames by analyzing motion vectors. The result looks much smoother (especially when going from 30 to 60 FPS), but it's slow and CPU-intensive.
Why is Smooth mode so slow?+
Motion interpolation analyzes every pixel pair between adjacent frames to construct synthetic intermediate frames. It can take 10-50x longer than the video duration on browser CPU. Smooth mode is capped at 100 MB and 120 seconds for that reason. For longer videos, use desktop FFmpeg.
When should I convert frame rate?+
Common reasons: matching a target platform (Instagram and TikTok prefer 30 FPS), reducing file size (60 → 30 FPS roughly halves bitrate), smoothing low-FPS footage (24 → 60 in Smooth mode), or syncing multiple clips to the same rate before editing.
Will conversion affect quality?+
Any re-encoding loses some quality — but with CRF 22-23 (visually lossless for most content) you won't notice. Going from a higher to lower frame rate loses motion smoothness; going lower to higher in Simple mode does nothing visually (it just duplicates frames). Smooth mode genuinely makes the result look smoother.
Why does my 60→30 conversion look choppy?+
Some content (especially gaming and high-motion sports) genuinely needs 60 FPS to look smooth. Dropping to 30 FPS will look slower regardless of the conversion method. If you need to keep file size down at 60 FPS, lower the resolution instead.
What's the output format?+
Always MP4 (H.264 + AAC). MP4 is universally supported on all platforms, browsers, and devices. The input can be MP4, MOV, WebM, or MKV.
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