KARAOKE.io

Karaoke ASS Subtitle Generator

The classic karaoke subtitle format: styled, word-timed .ass files.

Upload a song Create a song with AI

Free to use. Works with MP3 uploads, AI-generated tracks, and supported song links.

What this does

The .ass (Advanced SubStation) format is the gold standard for karaoke video subtitles — it supports fonts, colors, positioning, and the classic per-word karaoke fill effect. Karaoke.io writes .ass files with word-level timing generated from your actual track, ready for karaoke video renders, Aegisub fine-tuning, or direct playback in players that support ASS.

How it works

1Upload an MP3 or paste a supported song link — or generate an original song right here with AI.
2Whisper speech recognition transcribes the vocal and times every line and word against the actual audio.
3Preview the sync in the karaoke player, then download your file — plus every other format from the same result.

FAQ

What uses .ass files?

Karaoke video producers, anime-style subtitle workflows, Aegisub, and media players like VLC and mpv. It is the format behind word-fill karaoke effects.

Is the word timing automatic?

Yes — word timestamps come from AI speech recognition against your actual vocal, so the karaoke fill lands on the beat without manual timing.

Can I customize the styling?

The generated file uses clean default styling that you can restyle freely in Aegisub or any ASS-aware editor - fonts, colors, and effects are all editable text.

All Karaoke.io tools

📄 LRC Generator 🔤 Word-Level LRC 🎬 SRT Subtitles 🌐 VTT Captions 📝 Lyrics From Audio 🎚️ AI Song Remix
🎥 Want the full music video?

The same song can become a complete AI music video — storyboarded scenes, consistent characters, synced lyrics on screen, final MP4 — on AIMusicVideo.com.