A lyric video shows a song’s words on screen in time with the music. Upload a song or a video with sound; the tool recognizes the sung words, times them and renders karaoke-style highlighting over a background you choose. Recognition of singing is imperfect, so you can paste your own lyrics and re-time lines before the final export.
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How do I make a karaoke video when automatic lyrics are wrong?
Generate once with captions on, then open the caption editor under the result. Paste the correct lyrics, one line per row, play the video and press Tap or the space bar as each line begins. Save to render the MP4 again with your timing.
Best for songs where you know the words. Tapped lines are highlighted with an even sweep, not re-aligned syllable by syllable.
Specs and free limits
| Input | MP3, WAV, M4A, AAC, FLAC, OGG; MP4, MOV, WebM or MKV with sound (soundtrack only) |
|---|---|
| Maximum size | 100 MB per file |
| Maximum length | 10 minutes per file |
| Output | MP4 (H.264 video, AAC audio) |
| Frame and resolution | 9:16, 16:9 or 1:1 at 720p or 1080p |
| Recognition languages | English, Chinese, Japanese, Korean, Spanish, French, German or automatic detection |
| Watermark | None |
| Sign-up | Not required |
| File retention | Deleted after 24 hours |
| Price | Free; shared queue and hourly usage limit |
Supported formats
MP3, WAV, M4A, AAC, FLAC and OGG; MP4, MOV, WebM and MKV with sound (only the soundtrack is used). Export H.264/AAC MP4 at 720p or 1080p in 9:16, 16:9 or 1:1.
How it works
1. Upload the song
Open Create video and upload an MP3, WAV, M4A or a video with sound. Choose the sung language or automatic detection. If you upload a video, only its soundtrack is used.
2. Pick the karaoke look
Choose a theme such as Nightfall, a highlight style (karaoke sweep, solid, gradient, glow or multicolor), the caption position, the number of visible lines and the aspect ratio. Keep captions enabled.
3. Generate, then fix the lyrics
After the first render, open the caption editor under the result. Correct words, paste your own lyrics one line per row, shift all lines, or press Tap or the space bar while the video plays to set when each line starts.
4. Render again and download
Save to render with your edited lines, check the beginning, a chorus and the ending, then download the MP4 within 24 hours.
Is it right for you?
Good fit
- Musicians sharing a song or demo with on-screen lyrics
- Sing-along clips for practice, classes or social media
- Quick karaoke-style videos for songs up to 10 minutes
Not a good fit
- Burning subtitles onto your original video footage
- Recordings longer than 10 minutes or larger than 100 MB
- Frame-accurate, syllable-level karaoke timing
Limits and privacy
Up to 100 MB and 10 minutes per upload; up to 300 caption lines of 150 characters when editing. Free without sign-up; hourly usage limits apply. Results expire after 24 hours.
What to check before sharing
Automatic recognition of singing often misses or mishears words, especially with loud instruments, long notes or backing vocals. Word-by-word timing comes from the speech model; after you edit or paste lines, each line is highlighted with an even sweep rather than re-aligned word by word. There is no lyrics search and no vocal removal.
Common questions
Can I use my own lyrics instead of automatic recognition?
Yes. After the first render, paste your lyrics into the caption editor, one line per row. The lines are spread evenly over the original caption range; then shift them or tap to set each start time, and render again.
Is this a karaoke video maker with word-by-word highlighting?
Yes. With automatic captions, words change color as they are sung, using word timings estimated by the speech model. Lines you edit are highlighted with an even sweep across the line.
Can it remove the vocals to make a karaoke backing track?
No. The tool keeps the uploaded soundtrack as it is and does not separate vocals from music. Upload an instrumental version yourself if you need a sing-along track.
Can I add lyrics to my existing music video?
No. When you upload a video, only its audio is used and a new background is rendered. The tool cannot burn lyrics onto the original video frames.
Can I use a commercial song?
Only if you have the rights to publish it. The tool does not license music; upload recordings you own or have permission to use.
Compare free audio to video tools ↗
Product facts
AI Free Audio to Video · audiosubvideo.com
- Price and account
- Free to use without payment or sign-up; shared queue and hourly usage limits apply.
- Speech and image recognition
- Whisper small for speech and Tesseract for images on the production server. No speaker identification, transcript translation or vocal separation.
- Downloads
- MP4 for videos; TXT, JSON and SRT for timed transcripts; TXT and JSON for image OCR.
- Who can access results
- The originating browser session and signed-in site administrators. Uploaded content is not a public case study.
- Audio and video limits
- 100 MB · 10 min
- Completed file retention
- 24 hours