Weights AI: Free AI Song Cover Generator
Pick a voice, add a song, and hear your AI cover in about a minute.
and 2,000+ more voices- Free credits every day
- Works in your browser
- Train your own voice
Voice
Song
Sign in with Google or email to get 20 credits a day, about 2 covers.
Hear a Weights AI cover
Here is a verse of Billie Jean as Michael Jackson sang it, and as AI voice covers by SpongeBob, Mario and Mickey Mouse. Press play, then switch voices: the music, melody and timing stay the same; only the voice changes.
AI cover by SpongeBob SquarePants
Billie Jean
What is Weights AI?
Weights AI is an AI cover generator that runs in your browser. Pick one of 2,000+ community voices, or train a model of your own voice, upload a song, and get your AI cover in about a minute. Signing in gives you free credits every day, so you can start without paying.
An AI cover, also called an AI song cover or AI voice cover, is an existing song sung in a different voice. The AI separates the vocal from the music, re-sings the vocal with the voice you pick, and puts the music back underneath. The melody, lyrics and timing stay the same; only the voice changes, which is how SpongeBob ends up singing Billie Jean in the demo above.
The voices are RVC voice models, each trained on recordings of one singer, character or speaker. They are shared by the community, and voices of real people are unofficial fan models.
- Your songAny track with one lead vocal
- Vocal and music splitThe AI lifts the vocal out of the mix
- Re-sung by SpongeBobSame melody, lyrics and timing
- Mixed back togetherYour AI cover, ready to play
How to make an AI cover
- 1
Pick a voice
Choose from community voice models, or train your own from 10 minutes of singing.
- 2
Upload a song
Any MP3, WAV, M4A or FLAC you have the right to use.
- 3
Get your AI cover
Sign in with one click, and your song cover is ready in about a minute.
Popular AI cover voices
Not sure where to start? Try one of these voices for your first AI song cover.
Everything you need for great AI covers
2,000+ AI voices
Singers, rappers, cartoon and video game characters, anime characters and streamers, shared by the Weights AI community.
Your own voice
Train a private voice model from 10 minutes of your singing, then make voice covers with it like any other voice.
Pitch matching
Covering a female singer with a male voice, or the other way round? One setting moves the key so it sounds natural.
Any common audio file
Upload MP3, WAV, M4A, AAC, FLAC or OGG files up to 50 MB, or record yourself singing in the browser.
Ready in about a minute
The vocal is separated, re-sung in the new voice and mixed back with the music, so your AI cover is done in about a minute.
Download as MP3
Save your AI song cover, share it with friends, or play it again later from your history.
Ideas for your next AI voice cover
Stuck on what to make? A few kinds of AI covers that work well:
Cartoon characters singing hits
SpongeBob on Billie Jean, Peter Griffin on a power ballad: the less likely the pairing, the funnier the AI cover.
One singer in another's song
Make a voice cover of a rock anthem in Freddie Mercury's voice, or hear a ballad sung by Billie Eilish.
Your voice on any song
Train your voice once and hear yourself sing songs you never recorded, in a key that suits you.
Game and anime favorites
Mario, Sonic, Gojo or Kasane Teto: a song cover from outside their world is half the fun.
Make an AI voice cover with your own voice
Record 10 minutes or more of yourself singing without music, and Weights AI trains a private voice model in about 15 to 30 minutes. Then make song covers with it, just like with a community voice.
Train your voice- Your recordings10 minutes or more of a cappella singing
- Your private voice modelTrained in about 15 to 30 minutes
- Your AI coversAny song, sung in your own voice
Change the genre instead
Want a soul, Motown or lo-fi version of a song, not just a new voice? The genre changer remakes the whole song in a new style, sung by an original AI voice.
Tips for better AI covers
- 1Songs with one clear lead vocal make the best AI covers; heavy harmonies and shouted ad-libs are harder.
- 2Match the range: if the new voice is much higher or lower than the original singer, use the "Male → female" or "Female → male" pitch setting.
- 3Studio recordings beat live versions, because crowd noise and reverb end up in the vocal.
- 4If one model of a voice sounds off on your song, try another version of the same voice on its page.
- 5Training your own voice? Record 10 minutes or more of a cappella singing in a quiet room.
Questions
Are Weights AI covers free?
Yes, to start. Each AI cover uses 10 credits, and signing in with Google or email gives you 20 free credits a day, enough for about 2 covers. The Creator plan adds more credits, a faster queue and voice training.
Do AI covers sound realistic?
With the right song, very close. A studio recording with one clear lead vocal gives the most natural result, and the voice model matters too: popular voices have several versions, so if one sounds off, try another.
Which voices can I use for AI covers?
There are 2,000+ community voice models: singers, rappers, cartoon and video game characters, anime characters, YouTubers and more. You can also train a model of your own voice.
What files can I upload?
MP3, WAV, M4A, AAC, FLAC or OGG files up to 50 MB, which fits a full-length song. You can also record yourself singing in the browser.
Can I make an AI cover with my own voice?
Yes. Record or upload 10 minutes or more of your singing and we train a private voice model you can use for a voice cover of any song.
Is this a Weights.gg alternative?
Yes. Weights.gg shut down on April 1, 2026. Here you can keep making AI covers with community RVC voices, and train a voice model of your own.
Can I post or release my AI covers?
Covers that use a real person's voice are for personal, non-commercial use. To make something you can release, use the genre changer: it is sung by an original AI voice.
Make your first AI cover
Pick from 2,000+ voices and get free credits every day, right in your browser.