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iSamurai Video — AI Slow Motion

AI Slow Motion Video Maker: Buttery-Smooth Slow Mo

Make videos slow motion online with AI frame interpolation — this online AI slow motion video tool generates the missing frames instead of stretching your footage. So 2x, 4x and even 8x slow motion stays sharp and fluid, no high-speed camera required.

Start creating now See how it works

Runs in your browser · No software to install · No watermark on your videos

Choose your plan

One credit system for every tool. Yearly = 12 months for the price of 9 (3 free months). Paid AI video runs at 3 credits/sec (character swap & animate) and 5 credits/sec (head swap) — the Free 5 credits/sec applies only to 1-second test clips.

Free

$0

forever

  • 10 credits + daily bonus
  • Photo restore & image tools
  • Slow motion needs a paid plan
Start free

Kohai

$9.90/mo

$89.91/yr — 12 months for the price of 9 (3 free months)

Maxi variant: $15/mo → 300 credits · $135/yr

  • 150 credits + 50 daily
  • 2x smooth slow motion (2 cr/s) · 480p
Choose Kohai
Most popular

Ninja

$29/mo

$261/yr — 12 months for the price of 9 (3 free months)

  • 600 credits + 60 daily
  • 2x smooth slow motion (2 cr/s)
  • More credits = longer clips
Choose Ninja

Ronin

$49/mo

$441/yr — 12 months for the price of 9 (3 free months)

  • 1,500 credits + 100 daily
  • Up to 4x ultra slow motion (3 cr/s)
  • 720p output
Choose Ronin
Most popular

Samurai

$79/mo

$711/yr — 12 months for the price of 9 (3 free months)

Maxi variant: $150/mo → 12,000 credits · $1,350/yr

  • 4,000 credits + 200 daily
  • Up to 8x super slow motion (7 cr/s)
  • 1080p
Choose Samurai

Full pricing details →

Beyond stretched footage

What is AI slow motion?

Traditional slow motion simply stretches the frames you already have, which looks choppy and blurry. AI slow motion uses frame interpolation to generate entirely new frames between the existing ones.

AI frame generation

New frames, not stretched ones — at 2x, 4x or 8x

Upload a clip and pick a slowdown factor. The AI analyzes the motion between every pair of frames and generates the in-between frames a high-speed camera would have captured — so movement stays natural and smooth even at 8x. It also works the other way: keep the original speed and multiply the frame rate for silky, high-FPS playback.

  • AI frame interpolation — new frames are generated, not duplicated
  • 2x, 4x and 8x slow motion, up to 1080p HD output
  • Smooths choppy, low-frame-rate phone footage too

Want to change who’s in the clip before you slow it down? Try AI face swap or AI character swap first, then send the result through slow motion.

Try AI slow motion →
Traditional slow-moAI slow motion
How it slows the clipStretches existing framesGenerates new frames
Smooth at 4x–8x—✓
Works on low-FPS phone clipsChoppy✓
High-speed camera neededFor clean results—
Runs in the browserEditing software✓
Three steps, no editing skills

How to make videos slow motion online

Everything runs in the browser studio — upload, choose a speed, generate. The estimated credit cost is shown before you confirm, and full walkthroughs live in the documentation.

1

Upload

Add any video from your phone, camera or drone. Processing runs on cloud GPUs — nothing to install, and it works from mobile too.

2

Choose your speed

Pick 2x, 4x or 8x slow motion — or boost the frame rate at normal speed for smoother playback. The estimated credit cost updates as you choose.

3

Generate & download

The AI fills in the missing frames and renders your video in HD — no watermark, ready for TikTok, YouTube, Instagram or your editing timeline.

Get it right the first time

Tips for the smoothest slow mo

Small choices before you hit Generate make the biggest difference.

Start with steady, sharp footage

Frame interpolation builds new frames from the ones you give it — a well-lit, reasonably steady clip gives the AI clean motion to work with. Heavy motion blur in the source stays blurry in slow motion.

Match the factor to the moment

2x adds subtle drama to everyday clips, 4x suits sports and action, and 8x is for the split-second moments — splashes, impacts, jumps. Higher factors generate more frames and cost more credits per second.

Trim to the moment first

Credits are based on your video’s duration, so cut your clip down to the seconds you actually want slowed before uploading. A short, focused clip renders faster and costs less.

Avoid hard cuts and strobing

Interpolation works on continuous motion. Scene cuts, flashing lights and very erratic movement inside the clip can produce odd in-between frames — slow one continuous shot at a time. Working with old memories? Fix the stills first with AI photo restoration.

Fair & transparent

Slow motion plans & pricing

Credits are a fixed price per second of source video — never an estimate. You see the cost before you confirm, and higher slowdown factors unlock as you move up plans.

FreeKohaiNinjaRoninSamurai
Price$0$9.90/mo$29/mo$49/mo$79/mo
Credits / month10 +10 per daily login150 +50 daily600 +60 daily1500 +100 daily4000 +200 daily
AI slow motion—✓✓✓✓
Max slowdown—2x2x4x8x
Max resolution—480p480p720p1080p
Slow motion speedCredits
2x — Smooth2 credits / second
4x — Ultra3 credits / second
8x — Super slow7 credits / second

Credits are based on your source video’s duration. Example: a 5-second video at 4x slow motion = 5 × 3 = 15 credits. The estimated cost is shown before you generate.

What you get on Free vs Paid

Free Slow motion isn’t included on the Free plan — but your 10 signup credits plus 10 per daily login let you explore the studio’s photo tools first.

Paid AI slow motion from Kohai up: 2x on Kohai and Ninja, up to 4x on Ronin, and up to 8x with 1080p HD output on Samurai.

See full plans & pricing →

Frequently asked questions

What is an AI slow motion video maker?

It’s a browser-based tool that turns any video into smooth slow motion using AI frame interpolation. Instead of stretching your existing frames, the AI generates new in-between frames, so 2x, 4x and 8x slow motion looks like it was filmed with a high-speed camera.

How do I make a video slow motion online?

Upload your clip in the iSamurai studio, choose a slowdown factor (2x, 4x or 8x), and hit Generate. Everything runs in the browser on cloud GPUs — no software to install, and it works from your phone, tablet or desktop.

What is AI frame interpolation?

Frame interpolation analyzes the motion between two consecutive frames and generates the frames that would exist between them. That’s what keeps AI slow motion sharp and fluid — traditional slow motion just repeats or stretches frames, which looks choppy and blurry.

How many credits does AI slow motion cost?

2x slow motion costs 2 credits per second, 4x costs 3 credits per second, and 8x costs 7 credits per second of source video. For example, a 5-second video at 4x = 5 × 3 = 15 credits. The estimated cost is shown before you generate.

Which plans include AI slow motion?

Slow motion is a paid-plan feature. Kohai and Ninja unlock 2x slow motion, Ronin unlocks up to 4x, and Samurai unlocks the full 8x super slow motion. The Free plan doesn’t include slow motion, but its credits let you try the photo tools first.

What resolution can I export slow motion in?

Kohai and Ninja export at 480p, Ronin unlocks 720p HD, and Samurai unlocks Full HD 1080p output — ready for TikTok, YouTube, Instagram or further editing.

Will my slow motion video have a watermark?

No. Videos created with iSamurai carry no forced branding or watermark, so your finished slow motion clip is ready to share or drop straight into your edit.

Is my uploaded video private?

Yes. Your videos stay private and are processed securely — iSamurai does not share your footage with third parties. Your results land in your personal gallery, where only you can access them.

Ready to master time?

Turn any clip into buttery-smooth AI slow motion — 2x, 4x or 8x, right in your browser.

Start creating now →