Video Frame Rate Converter Online — Change FPS Locally
Change video to 24, 25, 30, 50 or 60 FPS locally and download an MP4.
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About this tool
The frame-rate converter samples or duplicates frames to create the chosen constant output FPS, then encodes H.264 video with optional AAC audio.
How to use
- Choose a supported video smaller than 200 MB.
- Select the output option, then start local processing.
- Preview and download the new video before closing the page.
Features
- 24, 25, 30, 50 and 60 FPS presets.
- Constant output frame rate.
- MP4 output with synchronized duration.
Common use cases
- Standardize footage before editing.
- Create a 30 FPS web copy.
- Match a project delivery frame rate.
Common issues and tips
- Raising FPS duplicates or interpolates timing samples but does not invent true motion detail.
- Lowering FPS removes frames and may make fast motion look less smooth.
Privacy
The video is processed locally in your browser with FFmpeg WebAssembly and is not uploaded to Tools12345.
Frequently asked questions
Does 60 FPS make 30 FPS footage truly smoother?
No, it cannot create motion detail missing from the source.
Does the duration change?
The intended duration remains synchronized.
Is variable frame rate retained?
No, output uses the selected constant frame rate.