What does FPS Converter do?
Convert a local video to a selected output frame rate and download an MP4. Tubelexity uses FFmpeg.wasm on processing to duplicate or drop frames while keeping playback duration approximately the same and retaining audio where present. Changing 30 FPS to 60 FPS this way repeats frames; it does not create new motion detail or perform AI interpolation.
How to use FPS Converter
- 1Choose a browser-readable video.
- 2Review detectable duration, dimensions and codec.
- 3Choose a target FPS and quality.
- 4Process locally, preview and download MP4.
Supported inputs and outputs
Inputs
MP4, MOV, WebM, Other browser-readable video where FFmpeg supports encoding
Outputs
MP4/H.264 with AAC audio where present
Practical uses
- Matching a delivery frame-rate requirement
- Preparing a consistent editing timeline
- Converting high-FPS footage to a lower output rate
Browser and media limitations
- Source FPS may be unavailable from browser-native inspection.
- Duplicating frames cannot add real motion detail.
- Variable-frame-rate sources may have timing differences.
- Video and audio are re-encoded, which can change quality and size.
- Large files may exceed browser memory.
How local processing works
Work stays in this browser tab. Your files are not uploaded to Tubelexity or a processing server. FFmpeg.wasm downloads only when conversion starts.
Frequently asked questions
Can I convert 30 FPS to 60 FPS?
Yes, but this duplicates frames instead of synthesizing new motion.
Does FPS conversion change video duration?
This mode aims to preserve duration by dropping or repeating frames. Minor timing differences can occur.
Is audio preserved?
Audio is kept where present and re-encoded to AAC in the MP4 output.
Why is source FPS unavailable?
Browsers do not reliably expose a video's encoded frame rate through standard media metadata.