Increase Video FPS with AI Frame Interpolation

Frame interpolation generates new in-between frames so a video plays back with more frames per second. FuzzPuppy uses RIFE (Real-Time Intermediate Flow Estimation), an AI model that estimates the motion between two consecutive frames and synthesizes the frames that would have existed between them, producing smooth, natural motion instead of choppy playback.

Yes. It is free and unlimited, requires no signup, and does not watermark your downloaded video. Interpolation runs locally in your browser, so there is no upload queue or paid tier.

The 2X option doubles the frame rate (24fps becomes 48fps, 30fps becomes 60fps) and 4X quadruples it (24fps becomes 96fps, 30fps becomes 120fps). Output is capped at 120fps, so 4X is best for 24–30fps sources and 2X for 50–60fps sources.

Upscaling increases the resolution of each frame (more pixels), while frame interpolation increases the frame rate (more frames). They fix different problems: use the AI Video Upscaler for soft or low-resolution footage, and frame interpolation for choppy or low-FPS motion. You can run both on the same clip.

High frame rates give footage the ultra-smooth look sometimes called the soap opera effect. For gaming clips, animation, drone shots, and AI-generated video this smoothness is usually desirable. For cinematic 24fps footage it can feel less film-like, so try 2X first and use the built-in before/after compare slider to judge the result on your own clip.

Yes — this is one of the most popular uses. AI video generators often output 8–24fps clips with visible stutter. Interpolating that output to 48–60fps makes motion dramatically smoother. Upload the generated clip, pick 2X or 4X, and compare the result side by side.

Download the generated MP4, drop it into the interpolator, and choose 4X for very low frame-rate output or 2X for 24–30fps output. Because everything runs locally, you can iterate quickly without re-rendering in the generator or uploading to another service.

No. Frame interpolation runs locally on your device in the browser using WebGPU. Your source video never leaves your computer.

Flowframes and Topaz Video AI are desktop applications you install; Topaz is paid. FuzzPuppy runs the same class of RIFE interpolation model directly in your browser — nothing to install, free, and private because your clip is processed on your own GPU. Desktop tools remain a better fit for long or 4K footage.

Clips up to 60 seconds and 1080p, in MP4, MOV, or WEBM up to 300MB. Longer clips can be trimmed first with the Video Trimmer. Output is an MP4 capped at 120fps, with the original audio preserved.

WebGPU lets websites use your graphics processor for demanding tasks like AI inference. Use an up-to-date desktop Chrome or Edge for the fastest results. If WebGPU is unavailable, the tool automatically falls back to a slower compatibility mode that still runs entirely on your device.

The AI model runs one full motion-estimation pass for every new frame it creates — a 10-second 30fps clip at 4X means roughly 900 generated frames. Speed depends on your GPU, clip length, and resolution. Keep the tab visible while it runs, since browsers throttle background tabs.

Yes. The original audio track is copied into the output without re-encoding whenever possible, with an AAC fallback for unusual codecs. If audio cannot be preserved, the tool warns you and produces a video-only file.

After processing, a before/after player shows the original and the interpolated video side by side behind a draggable divider, playing in sync. Slow playback to 0.5x or 0.25x to clearly see the added frames. For pixel-level inspection, open both files in Video Diff.

Yes. After interpolation, choose Normal speed, 0.5x slow motion, or 0.25x super slow-mo before downloading. The added frames keep motion fluid, and the exported video slows the audio with the footage. For the smoothest 0.25x result, interpolate at 4X.