Free RIFE video interpolation for Windows — local AI, no upload
FrameShift brings RIFE video interpolation to Windows in a simple right-click workflow. The RIFE model runs entirely on your machine via ONNX Runtime with DirectML GPU acceleration. No upload, no cloud service, no subscription. Right-click any video, pick a multiplier, get smoother motion.
Frame rate multipliers
Multiply your video's frame rate to generate smoother motion.
24 fps → 48 fps
30 fps → 60 fps
24 fps → 96 fps
30 fps → 120 fps
Normal speed or slow motion
The frame multiplier and playback speed are separate choices. Normal Speed keeps the original duration; Slow Motion x2 or x4 plays the result at half or quarter speed. Output FPS follows the multiplier and the selected playback speed.
In slow motion, keep the audio and enable Keep original pitch, or choose Remove audio in slow motion. The pitch option is available when audio is retained.
Why use local RIFE interpolation?
No upload, no cloud
Your videos stay on your machine. Processing happens locally with no data sent to any server.
GPU accelerated
ONNX Runtime with DirectML runs the RIFE model on your GPU when available, with automatic CPU fallback.
Free, open source
FrameShift is GPL v3. No trial, no subscription, no per-video charge. The RIFE model is open source.
Right-click from Explorer
No app to open. Right-click any video in Windows Explorer and the RIFE workflow launches directly.
Model integrity check
The RIFE model is downloaded once and verified with SHA-256 before every run to ensure correctness.
Non-destructive output
The interpolated video is saved next to the source with a unique name. The original is never overwritten.
How it works
Right-click a video in Windows Explorer and choose FrameShift → Interpolate Video (RIFE).
Pick a model and multiplier — choose RIFE v4.26 x2 or v4.25 Lite, then ×2 or ×4. Choose Normal Speed or Slow Motion x2/x4 and the audio options.
Model preflight — FrameShift downloads the RIFE ONNX model on first use and verifies it with SHA-256.
Processing — frames are extracted, interpolated by the RIFE model, and reassembled into the output video according to the chosen playback speed and audio settings.
Get your result — the interpolated video is saved next to the source. Processing time depends on video length and your GPU.
Frequently asked questions
Is there a free RIFE interpolation tool for Windows?
Yes. FrameShift includes a free, local RIFE video interpolation workflow for Windows. It runs the RIFE model via ONNX Runtime with DirectML GPU acceleration. No upload, no cloud, no subscription.
What RIFE model does FrameShift use?
FrameShift uses RIFE v4.26 x2 and RIFE v4.25 Lite ONNX models. The model is downloaded automatically on first use and integrity-checked with SHA-256 before processing begins.
Does RIFE interpolation require a GPU?
No. FrameShift uses DirectML for GPU acceleration when available and falls back to CPU automatically. A dedicated GPU speeds up processing significantly, but the tool works on any Windows 10/11 machine.
What frame rate multipliers are supported?
FrameShift supports ×2 and ×4 multipliers. A ×2 multiplier on a 30 fps video produces a 60 fps output; ×4 produces 120 fps.
Can I create slow-motion video with RIFE?
Yes. Choose a x2 or x4 frame multiplier, then Normal Speed, Slow Motion x2 or Slow Motion x4. Slow motion reduces playback speed independently of the frame multiplier. Keep audio with the original pitch, allow its pitch to change, or remove audio in slow motion.
What video formats does RIFE interpolation support?
FrameShift accepts any format supported by FFmpeg — MP4, MKV, MOV, AVI, WebM and many others. The output is an MP4 file saved next to the source.
How does FrameShift compare to Topaz Video AI for RIFE?
Topaz Video AI is a paid commercial product with proprietary models tuned for maximum quality. FrameShift uses the open-source RIFE model and is completely free. For casual use, animation smoothing and hobbyist workflows, FrameShift produces very good results at zero cost.
Try RIFE interpolation — free, local, no upload
Download FrameShift and interpolate video on Windows with one right-click.