Video Frame Interpolation Online Free – Smoother Motion, Higher FPS

How to increase video FPS online

Add a video, choose how much smoother you want it, then export.

1
Add video
Drag and drop your video or click to browse. Nothing is uploaded — the file is read on your device.
2
Choose the rate
Pick a multiplier (2x, 3x, 4x) or set an exact target frame rate, then choose a method.
3
Check the middle frame
The preview shows the two original frames with the newly created frame between them, so you can see the motion before you export.
4
Interpolate and download
Run it, then download the result as MP4, MOV or WebM.

Why use frame interpolation?

Interpolation increases FPS so playback appears smoother, especially in fast motion scenes. Instead of showing each recorded frame for longer, it works out what the picture looked like in between two frames and creates that moment as a new one — so motion that stepped now flows.

That matters in three common situations. Footage shot at 24 or 30 fps judders when panned across a bright scene, and doubling the rate removes it. Screen recordings and gameplay captured below 60 fps stutter on every modern display, which runs at 60 Hz or higher. And any clip you want to slow down runs out of frames the moment you stretch it, which is why a simple speed change looks choppy while an interpolated one stays fluid.

Frame interpolation from 2x to 4x, AI-smooth, on your device.

Benefits

Smoother playback: Higher FPS reduces choppy motion.
Nothing is uploaded: Your video is read and written on your own device.
Flexible export: Choose MP4, MOV or WebM.
No install: Use it directly, with no watermark.
Fast iteration: Adjust the rate or method and rerun quickly.

How Frame Interpolation Works

Choose target FPS and method, then process and download. Additional frames are generated to reach your selected frame rate. Each new frame is built from the two real frames on either side of the moment it belongs to, so the closer together those two are, the more accurate the result.

The work happens in two stages. First the tool works out how the picture moved between the pair — which parts travelled where, and how far. Then it places each part of the new frame along that path, at the fraction of the way across that its moment in time calls for. A frame a quarter of the way between two originals takes each moving object a quarter of the way along its journey.

Tool Features

2x, 3x and 4x or an exact rate: Multiply the frame rate you already have, or name a target between 24 and 120 fps.
Four methods: AI, motion-compensated, blend, or FPS-only — trade quality against speed.
Slow motion: Spend the new frames on length instead of smoothness, at 2x, 3x or 4x.
Output formats: Export MP4, MOV or WebM.
Middle-frame preview: See the frame that will be created, between the two it sits between.
Time range: Interpolate one part of a long clip instead of all of it.
Re-apply: Try new settings without re-uploading.
Cancel any time: Stop a long run without reloading the page.

Which method should you use?

The four methods are not four qualities of the same thing — they answer the question differently, and the right one depends on your footage and your hardware.

AI: A neural network trained on real footage to predict the frame in between. It handles the hard cases — one object passing in front of another, fine detail, fast motion — far better than anything based on tracking alone, and it is the default. It is also the most demanding, so it is at its best on shorter or smaller clips.
Motion-compensated: Tracks how each part of the picture moved and carries it along that path. Much faster than AI and far sharper than blending, and it runs anywhere. It can smear where something is uncovered as an object moves away.
Blend: Averages the two neighbouring frames. It never fails and never surprises, but a moving object appears twice at half strength — the classic ghost. Best on slow, gentle motion.
FPS only: Repeats or drops frames to hit the target rate without creating anything. Instant, and the honest choice when you need a specific frame rate for a player or an editor rather than smoother motion.

Slow motion without the stutter

Slowing a clip down with a speed control does not create anything — it just holds each existing frame on screen for longer, which is why slowed footage judders. Interpolation solves the actual problem by making the frames that were never recorded.

Turn on slow motion and the new frames are spent on length instead of smoothness: a 4x interpolation of a two-second clip becomes eight seconds playing at a quarter speed, with four times as many frames as the camera captured. The picture stays as fluid as the original because every frame in between is a real, computed picture rather than a repeat. Audio is dropped on a slowed export — there is no honest way to stretch a soundtrack to four times its length inside a frame-rate tool, and a track that no longer matches the picture would be worse than none.

What interpolation cannot fix

Being clear about the limits is more useful than promising they are not there, because every one of them is visible in the result if you know to look for it.

Scene cuts: There is no motion between the last frame of one shot and the first of the next, so a created frame there is a smear. Trim to one continuous take, or use FPS-only.
Very fast motion: When something crosses a large part of the frame between two exposures, there is not enough information to place it accurately. Use a lower multiplier.
Heavy motion blur: A blurred subject has no sharp edges to follow, so the created frames inherit the blur rather than removing it.
Missing detail: Interpolation adds frames, never resolution. A soft or noisy source stays soft at a higher frame rate.

Everything stays on your device

Your video is never uploaded. It is read, interpolated and written back on the machine you are sitting at, which is why there is no queue, no file-retention policy to read and no size at which the tool starts charging for bandwidth.

That is also why speed depends on your hardware rather than on how busy a server is. The tool takes the fastest route your device actually supports, checked by running it rather than guessed in advance, and falls back to a slower route that produces the same picture when it has to. Nothing about the result changes with the route — only how long it takes.

Hardware accelerated on your device, with a compatible route for hardware that cannot.

Frequently Asked Questions

What is the difference between MCI, Blend, and FPS-only interpolation methods?

Motion-compensated interpolation (MCI) tracks the actual movement of objects between frames to synthesize realistic in-between frames — it produces the smoothest result but is the most processing-intensive. Blend averages adjacent frames to create intermediate frames, which is faster and works well for most footage but can create ghosting on fast-moving edges. FPS-only simply duplicates or drops frames to reach the target rate without synthesizing new content — it is instant but does not actually smooth motion.

Will frame interpolation make my video look unnatural or like the 'soap opera effect'?

It can, depending on the source and method. The soap opera effect happens when 24fps cinematic footage is converted to 60fps or higher — the smoother motion removes the motion blur that gives film its characteristic look. To avoid it, use interpolation on footage that was already captured at a higher frame rate (60fps+), or use it specifically for slow-motion previews. For cinematic content, staying at or near the original frame rate usually looks more intentional.

What target FPS values should I use for different goals?

For smoother web or social media playback from 30fps source, 60fps is the standard target. For slow-motion effects from 60fps source, 120fps or higher creates a visible smoothing effect. For gaming footage or screen recordings that stutter below 60fps, interpolating to 60fps removes jitter. Avoid going above 2–3× the source frame rate, as the synthetic frames become increasingly speculative and artifacts appear on complex motion.

Why does interpolated video show ghosting or blurring on fast-moving objects?

Ghosting occurs when the interpolation algorithm cannot accurately track where a fast-moving object will be between two frames. The Blend method averages pixel positions, which creates a translucent double-image. Motion-compensated mode reduces this by estimating how each part of the picture moved, but block-based tracking still struggles where one object passes in front of another. AI mode handles those cases best, because it was trained on exactly them. For footage with rapid motion, lower the multiplier (2× instead of 4×) to reduce artifacts.

Does frame interpolation work on videos with scene cuts or jump cuts?

Scene cuts are the biggest weakness of frame interpolation. The algorithm tries to synthesize a frame between the last frame of one scene and the first frame of the next, producing a brief visual glitch or smear at every cut. For edited videos with many cuts, either trim to a single continuous take before interpolating, or use the FPS-only method which avoids synthesis entirely.

Does my video get uploaded to a server for processing?

No. It all runs on your device, not our servers — the video is read, interpolated and written back locally, so nothing is uploaded and nothing is stored anywhere. Interpolation runs at full quality and the speed depends on your hardware, the clip length, and the target frame rate.

What is the difference between smoothing and slow motion?

They create exactly the same new frames and differ only in how those frames are played back. Smoothing plays them at the higher rate, so the clip is the same length and simply looks smoother. Slow motion plays them at the original rate, so a 2× interpolation becomes a clip that lasts twice as long and moves at half speed. Because the extra frames are genuinely created rather than repeated, the slow motion stays sharp instead of stuttering the way a simple speed change does.

Why is the audio removed when I turn on slow motion?

Because there is no honest thing to do with it. Stretching the picture to four times its length leaves the original audio ending a quarter of the way through, and time-stretching audio without changing its pitch is a different job with its own trade-offs. Keeping a soundtrack that no longer matches the picture would be worse than dropping it, so slow-motion exports are silent and say so before you run them. Ordinary smoothing keeps the audio track untouched.