Frame Rate Converter

About Frame Rate Converter

This online frame rate converter allows you to change the FPS (frames per second) of your videos. Convert to standard frame rates like 24, 30, 60 FPS or choose any custom value from 1 to 120 FPS. All processing happens locally in your browser for complete privacy.

What video formats are supported?

Input: MP4, WebM, MOV, AVI and other common formats. Output: You can keep the same format as input or convert to MP4, WebM, MOV, or AVI.

How do I convert video frame rate?

Upload your video, select target FPS using presets (24, 25, 30, 50, 60, 120) or custom slider (1-120), choose interpolation method and quality, then click 'Convert Frame Rate'. You can preview and compare the result before downloading.

What is the file size limit?

The maximum file size is 100MB. This ensures smooth processing in your browser. For larger videos, consider using desktop video editing software.

What are the common frame rates?

24 FPS: Cinema/film standard. 25 FPS: PAL TV standard (Europe). 29.97/30 FPS: NTSC TV/web video standard. 50 FPS: PAL high frame rate. 59.94/60 FPS: Smooth motion, gaming. 120 FPS: Very smooth, slow-motion source.

What is the difference between interpolation methods?

Duplicate Frames: Fastest, simply repeats/drops frames. Good for small FPS changes. Blend Frames: Balanced speed and quality, creates intermediate frames by blending. Motion Interpolation: Best quality, analyzes motion to create smooth intermediate frames. Slowest but best for large FPS increases.

What does Speed Mode do?

Keep Duration: Standard conversion, video plays at normal speed with new frame rate. Change Speed: Creates slow-motion (higher FPS) or fast-motion (lower FPS) effects. For example, converting 30fps to 60fps with Change Speed creates a 2x slow-motion effect.

How does the quality setting work?

The quality slider controls the CRF (Constant Rate Factor) for video encoding. Best quality produces larger files with minimal compression. Smallest produces smaller files but with more compression artifacts. Balanced is recommended for most uses.

Will video quality be affected?

The video is re-encoded with your chosen quality settings. Frame rate conversion quality depends on the interpolation method chosen. Motion interpolation provides the best quality for increasing FPS.

Is my video file safe?

Absolutely! All video processing happens directly in your browser using FFmpeg.wasm (WebAssembly). Your video file is never uploaded to any server. Everything stays private on your device.

How long does processing take?

Processing time depends on video length, FPS change magnitude, interpolation method, quality setting, and device performance. Duplicate frames is fastest. Motion interpolation is slowest but highest quality.