Add AI Sound to Video
Start With a Free Account
Upload a silent clip of up to 30 seconds and describe how it should sound: rain on a window, footsteps on gravel, a busy cafe. The editor prices it before it runs.
Making the account and setting up the job are free, with no card. Generating the sound needs any credit pack, at a flat 1 credit per clip whatever its length.
See the full AI Add Sound to Video
Creators who start free on Inflyu
Sound from a sentence
The picture is left alone; only audio is generated.
Prompt to sound
Type the sound you have in mind and the model generates effects and ambience to fit the clip.
Picture untouched
The video is not re-rendered. Only the sound is new.
Clips up to 30 seconds
Longer clips are refused before any charge instead of being cut short quietly.
Flat 1 credit
One price per clip on any credit pack, shown before you run.
Refund on failure
A run that fails gives its credits back automatically.
Add sound in three steps
Set up at no cost, run with any pack.
Make an account
Sign up free with no card and open the add-sound tool.
Upload and describe
Drop in the silent clip and write the sound as a short phrase.
Run with a pack
Any credit pack covers it. The clip with sound saves beside the silent original.
AI Add Sound to Video: free FAQ
Is the AI Add Sound to Video really free?+
The account is free, the output is not. Signing up costs nothing and needs no card, so you can open the tool and set up a job, but generating the sound needs any credit pack. Credit packs start at $1.99, are one-time and never expire. There is no subscription.
What prompts give useful sound?+
Concrete sources and places: waves and gulls at a beach, keyboard clicks in a quiet office. Name what is on screen.
Does it make speech or a song?+
It is built for sound effects and ambience. A spoken line or a music track is a job for a different tool.
Why does a 1 credit job need a pack?+
A free account can only spend on a short list of Video Editor tools, and add-sound is not on it. Any credit pack unlocks it, and the credits never expire.
What happens if my clip is too long?+
Clips over 30 seconds are refused before any credit is charged. Trim the clip, then upload it again.
Do I need a subscription?+
No. You can pay as you go: credit packs are one-time purchases and their credits never expire. If you would rather have a steady supply, the monthly Starter ($7.99), Creator ($19) and Pro ($49) plans refill your credits each month, and you can cancel anytime. Unused monthly credits do not roll over.