What is frame rate (fps) and why would I want to change it?

Frame rate is how many individual images (frames) make up one second of video. Common reasons to change it include matching a platform's requirements, reducing file size by lowering fps, or converting footage to match another video's frame rate before combining them.

Will lowering the frame rate make the video look choppier?

Reducing fps means fewer frames per second are shown, which can make fast motion look less smooth, especially at very low frame rates — the effect is more noticeable in action-heavy footage than in mostly-static content like a talking-head video.

Can I increase the frame rate above what the original video was recorded at?

Yes, though this involves generating additional frames rather than capturing genuinely new motion detail, since the source footage doesn't contain more temporal information than it was originally recorded with.

Does changing frame rate affect video length or audio sync?

The tool is built to adjust frame rate while keeping the video's duration and audio synchronization intact.

What are common frame rate targets?

24fps is standard for a cinematic look, 30fps is common for general video and broadcast, and 60fps is often used for smooth motion in sports or gaming footage — the right target depends on your intended use.

Is my video uploaded to a server?

No. Every operation runs locally in your browser using a real FFmpeg engine compiled to WebAssembly. Your video is never transmitted anywhere.

Is this frame rate converter free with no limit on how many videos I process?

Yes. This free online video frame rate converter has no daily limit, no per-file cost, and no watermark added to the output.

Why would combining footage from different cameras require matching frame rates first?

Video editing software generally expects all clips in a single timeline to share a consistent frame rate for smooth, correctly-timed playback — mixing clips recorded at different fps without converting them first can cause noticeable stutter, timing drift, or playback issues when they're edited together.

Does lowering frame rate always reduce file size significantly?

It contributes to a smaller file since fewer frames need encoding, but the overall size reduction depends on the specific bitrate and resolution settings as well — frame rate is one factor among several that determine final file size, not the only one.

What frame rate is best for footage meant to look cinematic?

24fps is the traditional standard associated with a cinematic look in film and many prestige TV productions, giving motion a particular character that differs from the smoother look of 30fps or 60fps footage.

Can I change frame rate on footage that's already been trimmed or cropped?

Yes, frame rate conversion works on any valid video file regardless of whether it's original footage or a version that's already been trimmed, cropped, resized, or otherwise edited.

Will lowering the frame rate make my video choppier?

Reducing frame rate does reduce how many frames are shown per second, so fast motion can look somewhat less smooth at a lower rate, though for most everyday footage the difference is subtle rather than jarring, especially converting between common rates like 30 and 24.

Can I convert to a frame rate higher than the original footage supports?

Technically yes, though the encoder can only interpolate or duplicate existing frames to reach a higher target rate rather than genuinely recovering visual detail that was never captured, so going higher does not add real smoothness beyond what the source footage actually contains.

Does changing frame rate affect audio sync?

No, audio timing is preserved independently of the video frame rate change, so dialogue and sound effects stay aligned with the visual content after conversion.

Change Video FPS

Retarget a video's frame rate up or down.

Processed entirely in your browser. Your file is never uploaded anywhere.

Why change video frame rate with Tools Root

Frame rate mismatches cause real problems — combining footage from two different cameras with different fps, meeting a specific platform's technical requirements, or reducing file size by lowering an unnecessarily high frame rate for content that doesn't need it. This free frame rate converter resolves all of it in the browser.

Real re-encoding, duration and sync preserved

Changing frame rate through actual re-encoding, rather than simply relabeling metadata, means the output genuinely plays at the new frame rate while keeping the video's length and audio synchronization correct.

A free FPS converter for editing and platform compatibility

Video editors that expect a consistent frame rate across a project, and platforms with specific fps requirements, both benefit from this tool's genuine re-encoding at your chosen target frame rate — done directly in the browser at no cost, with duration and audio sync kept intact throughout.

Common use cases

Matching frame rates between clips from different cameras before editing them together, reducing an unnecessarily high frame rate to save file size, converting footage to a cinematic 24fps look, meeting a specific platform's frame rate requirement for upload, or standardizing a batch of mixed-fps recordings for consistent playback.

Combining frame rate conversion with other edits

Frame rate changes pair well with Compress Video when file size is the main goal, and with Trim Video if only part of the source footage needs converting.

Why a video's frame rate matters beyond just smoothness

Frame rate affects more than how fluid motion looks on screen. Many video platforms and editing timelines expect a specific frame rate, and footage recorded at an unusual rate, like a phone that defaults to 30fps when a project timeline is set to 24fps, can cause subtle timing drift once combined with other clips. Converting to match a target frame rate before importing footage into a shared project avoids that drift entirely.

Changing frame rate versus changing playback speed

Lowering a frame rate does not by itself slow a video down. Since the browser-based encoder simply resamples how many frames represent the same real-world duration, a 60fps clip converted to 24fps still plays at its original speed, just with fewer, evenly-spaced frames representing that same span of time. Genuinely slowing footage down is a separate operation that also changes total playback duration.

How to change a video's frame rate

1Upload your video file.
2Choose your target frame rate (fps).
3The tool re-encodes the video at the new frame rate.
4Download your video with the updated frame rate.

Frequently asked questions

Related tools

Compress Video

Shrink video file size with a configurable target quality and bitrate.

Resize Video

Change video resolution to a standard preset or custom dimensions.

Trim Video

Cut a video down to a selected time range.

Crop Video

Crop the video frame to a selected region.