A gasp, a scream, happy tears, a face after a spicy chip. Pick a ready reaction or describe one, and the AI makes a vertical clip with a big, real-looking reaction you can stitch, duet or cut into your own video.
Each one opens the video generator with the scene written for you. Change the words, pick 480p or 720p and the length, and see the exact price before you generate.
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A reaction video generator is a tool that makes a short AI clip of someone reacting to something: a game moment, a plot twist, a gift, a test result. You choose one of the ready reactions or describe your own: who reacts, where they are, what they see and what they say. The video model creates a real-looking clip with the facial expression, the body language, the line and the room around them.
Sign in and choose one of the ready reactions, or press Write my own reaction to start the video generator from a blank prompt.
Change the person, the room and what they're reacting to, describe the reaction in steps and put the line in quotes. Set the aspect ratio to 9:16.
Pick 480p or 720p and a length up to 30 seconds, check the price on the button and generate. The clip is saved in My Videos.
Shocked gamer, Taste test, Plot twist, Surprise gift and Exam results. Each opens the video generator with the person, the room, the reaction and the line already written.
The prompts describe the reaction step by step: stares, gasps, jumps back, covers their mouth, starts happy crying. That build-up is what makes a reaction land in a few seconds.
"Did you see that?" or "Okay, that is a mistake." Put the line in quotes and the person says it at the peak of the reaction.
RGB gaming lights, a bright kitchen, a living room lit by the TV, a dorm in daylight. The setting tells viewers what kind of moment it is before anyone speaks.
Use the clip as the reaction half of a stitch or duet, or cut it in after your own clip so the reaction follows the moment.
A filmed reaction needs a camera, good light and a convincing face on cue, take after take. Here you describe the reaction.
| Feature | Reaction Video Generator | Filming your own reaction |
|---|---|---|
| What you need | A short description of who reacts and to what | A camera, lights and yourself or a friend on camera |
| The reaction | As big or as subtle as you write it | Acted on cue, which rarely looks natural the first time |
| Setting | A gaming room, a kitchen or a living room at night, from the prompt | Whatever room you have |
| Variations | Change the line or the mood and generate again | Another take, another setup |
| Price | From 442 credits for 5 seconds at 480p | Your time and gear for every clip |
You have a clip with a surprise at the end, a trick shot, a reveal, a twist, and want a reaction to cut to.
Show the moment someone tries something: the first bite, the first sip, the first spray.
A clip of someone freezing, shouting "I knew it" or crying with joy works as a reply to almost anything.
Get a reaction shot for your stitches, duets and edits without filming yourself reacting on cue.
Add a shocked or hyped reaction after highlights, trailers and plot moments.
Make first-try and unboxing reactions for your brand's posts from a prompt.
Build a set of reaction clips you can reply with, each with its own line and mood.
From 442 credits for a 5-second clip at 480p. 10 seconds at 480p costs 876 credits; at 720p, 5 seconds is 986 and 10 seconds 1,972.
Pick a ready reaction or describe your own: who reacts, to what, how and what they say. Choose the length and resolution and generate; the clip is saved in My Videos.
Yes. Download the clip from My Videos and use it in your stitch, duet or edit, or join it with your own clip using Merge Videos.
Yes. Put the line in quotes in the prompt; the video model can generate the speech with the reaction. Short lines come out clearest.
Usually about 5 seconds. The generator goes up to 30 seconds, but a reaction works best as one quick build and peak.
No. Describe invented people only, and don't name or describe real people, streamers or public figures.
Not directly; the reaction is generated from your description. Describe what the person is reacting to, then place the clip after or beside your video.
Vertical 9:16 for Shorts, Reels and TikTok, or another shape such as 16:9 or 1:1, set in the generator.
Yes. Sign in with Google or email; each job costs credits from your balance, and the result is saved in My Videos.
If a job can't finish, the credits it used go back to your balance automatically.
A reaction clip with a big, real-looking reaction, ready to stitch or duet. from 357 credits, and the result is saved in My Videos.
