Mountain RoadForward motion
A steady road and distant peaks give continuation models a readable camera direction.
Video-to-video continuation · try online
AI Video Extender
Upload an image or video. AI continues the subject, motion, lighting, and style for 5 or 10 more seconds. Start without an account with 3 free credits; free credits reset monthly on the first day of each calendar month.
Before and after
Extend byEach 5 seconds uses one free credit
Upload image or video
Choose one file. Your free continuation starts automatically.
Automatic 5-second continuation3 free credits monthlyNo account to startPrivate result
02 / licensed references
Licensed motion references for continuation testing
These nine licensed source pairs are motion references, not ExtendAI Video generations. They show camera direction, light, and movement patterns that help explain what a continuation model must follow.
Costa Rica SunriseTime-lapse
Gradual sky and water changes test light and color continuity across new frames.
Garden GlideLateral motion
A smooth garden view provides layered foreground and background movement.
Moving SubwayFast motion
Strong lateral movement makes speed and frame cadence easy to evaluate.
City Through TreesAmbient motion
Fine foliage and a distant skyline create a useful temporal-consistency test.
Lake CrossingAerial motion
A forward aerial path gives the generated continuation a clear trajectory.
Snow Road CurveCurved motion
The changing road direction tests whether a continuation follows the existing turn.
Indonesian SunsetChanging light
Cloud and sunlight movement reveal abrupt color or exposure changes.
Mountain ApproachWalking motion
A distant hiker and rising terrain provide a clear, non-identifying movement trend.
03 / the method
How to extend a video with AI in three steps
Upload your clip
Drop in an MP4, MOV, or WebM video up to 50 MB. Have a photo instead? Add a JPG, PNG, or WebP image up to 10 MB and use it as the first frame of a moving clip.
Join the queue
Uploading starts the job automatically. Video clips use native video extension for a 5-second continuation (or your optional 10-second selection); still images start an image-to-video job.
Preview and download
Follow queue progress while the model creates the next shot from your video or animates your still image. Then preview the result, choose the download option available to your plan, copy its unlisted share link, or continue the completed result by another 5 seconds.
04 / field notes
What is an AI video extender?
An AI video extender lengthens existing footage by generating what could happen after the final frame. It studies the subject, movement, camera direction, lighting, color, and composition, then creates new frames that aim to feel connected to the same shot. That is useful when a good clip stops too early, a pan needs room to settle, or a social edit needs a few more seconds. Instead of freezing or repeating the ending, the tool attempts to continue the action and make the video longer with genuinely new footage. If you only have a still, the image to video workflow uses that image as the first frame and creates a short moving clip from it.
Read the practical guide
This is different from a general AI video generator. Text-to-video invents a scene from a written idea; a video extender AI workflow begins with your footage. The video route reads your source clip directly and generates a continuation, while the image route uses your still as the opening frame of a new moving clip.
For a natural result, upload the best source you have and choose a clip with one clear action near the end. Walking, driving, flowing water, drifting clouds, and steady camera movement give the model a readable direction. Hard cuts, title cards, heavy blur, tiny faces, or objects entering from outside the frame are more difficult. To extend video without losing quality, avoid repeatedly compressed messaging copies and inspect identity, hands, text, and fast motion before publishing.
The online video extender accepts MP4, MOV, and WebM files up to 50 MB, plus JPG, PNG, and WebP images up to 10 MB. Uploading starts a 5-second job by default, with a +10-second option that uses two free credits. There is no prompt form or model picker to learn. Most short jobs finish in about one or two minutes, depending on the shared queue. Free credits reset monthly, and results stay unlisted unless you share their private link.
Practical guidance
- Use a clean source with one readable action near the ending.
- The default +5-second job uses one free credit; +10 seconds uses two.
- Results are unlisted by default and are never added to the public demo gallery.
At-a-glance specifications
| Item | Details |
|---|---|
| Video input | MP4, MOV, WebM · up to 50 MB |
| Image input | JPG, PNG, WebP · up to 10 MB |
| Continuation length | +5 seconds default · +10 seconds optional |
| Result access | Unlisted share link · MP4 download |
05 / applications
Useful when the shot is right—but the timing is not
An extra 5 or 10 seconds can solve practical edit problems without another shoot, a visible freeze frame, or an awkward loop.
Social video timing
Give voice-over, captions, or a call to action enough room without slowing the entire clip.
B-roll and transitions
Continue a pan, dolly, or ambient scene so an edit can land naturally on the beat.
Product and fashion
Extend a turntable move, fabric motion, or reveal when the original take stops early.
Creative exploration
See a plausible “next moment” for animation, concept footage, and visual ideation.
06 / why extendai
Why start with ExtendAI Video?
The workflow stays direct: upload, wait in the queue, preview, and choose what to do with the result. The free tier includes 3 credits each calendar month without an account. Free users can choose +5 seconds for 1 credit or +10 seconds for 2 credits. Signing in keeps extension history across devices; paid plans add larger credit allowances and priority processing. Audio-capable routes can generate synchronized sound, while compatible source audio is kept with the final video whenever possible.
How your result is handled
Your upload is handled for the purpose of creating your result, and finished videos stay outside the public gallery. Each result uses an opaque, unlisted share link, so it is not discoverable through a public results feed. Keep a copy of anything important before the retention period ends.
07 / answers
AI video extender questions, answered
Can I try an AI video extender for free?
Yes. You receive 3 free credits each calendar month with no account required. A 5-second extension uses 1 credit, and a 10-second extension uses 2 credits. Free credits reset monthly and do not roll over.
What is the difference between an AI video extender and an AI video generator?
A generator creates a new scene from text or an image. An AI video extender continues footage you already have and aims to preserve its subject, motion, lighting, and style.
How long can I extend a video?
Choose +5 seconds by default or +10 seconds when you need a longer take. After a result is ready, Continue another 5 sec uses one more free credit; repeated generations may increase visual drift.
How do I extend a video without losing quality?
Use the original export and a clean final shot. The pipeline preserves source properties where the active model allows, but generated details should still be reviewed at full size.
What video formats and sizes are supported?
Upload MP4, MOV, or WebM video up to 50 MB, or JPG, PNG, and WebP images up to 10 MB. Results download as MP4.
Do I need to create an account to try it?
No account is needed to start. Uploading begins the job automatically with 3 free credits each month; signing in keeps your history across devices and does not reset the allowance.
What happens to my uploaded videos?
Uploads are stored for processing and may be sent to the selected provider. They are never added automatically to the public gallery; see the Privacy Policy for retention details.
Can I use this as an image to video tool?
Yes. An uploaded image becomes the first frame, and the image to video workflow infers a short moving continuation using server-side guidance. It is designed for starting a clip from one still, while the video workflow continues footage you already recorded.
Will the AI continue the sound too?
Whether the new segment includes sound depends on the model route behind your job. When the route supports audio, the continuation gets its own track and we join it with your original soundtrack. Otherwise your result keeps the original audio.