Make karaoke subtitles with word-by-word timing. Exports an ASS file with karaoke tags that fill each word as it is sung or spoken. Works in VLC and Aegisub.
Free for recordings up to 1 hour and 1 GB. Longer files need a paid plan.
How It Works
Drop an audio or video file — MP4, MOV, MP3, WAV, M4A and more. The language is detected automatically.
AssemblyAI transcribes every word with exact timings — usually a fraction of the recording's length.
Copy the text or download SRT, VTT and TXT files.
The Karaoke Subtitle Maker is a free online tool from ShortsHero: aSS files with word-by-word fill. AssemblyAI speech recognition does the work — a 5-minute recording usually comes back in under 30 seconds. It is free for files up to 1 hour with no watermark; longer recordings need a paid plan.
Free transcription covers files up to 1 hour. If your recording is longer, a paid plan lifts the limit — or trim it into parts and run each one.
Why Use This Tool
Every word carries its start and end time, so subtitles line up with the speech.
The formats YouTube, Premiere, Resolve, CapCut and every major player accept.
Filter the transcript on the page to find any word and jump to its timestamp.
Full recordings, not a one-minute sample. Paid plans lift the length limit.
The spoken language is detected automatically.
Use the files anywhere — the transcript and subtitles are yours.
Yes. Files up to 1 hour long are free, with no watermark and no account needed. Recordings longer than 1 hour need a paid ShortsHero plan.
MP4, MOV, WebM, MKV, MP3, WAV, M4A, AAC, OGG, FLAC and most other audio and video formats, up to 1 GB. For a long video, uploading just the audio is faster.
Yes. Download the SRT and open it in our free online SRT editor, or in any video editor, to fix a word or a timing.
Usually well under the length of the recording — a 10-minute file is typically done in about a minute.
ShortsHero turns long videos into short vertical clips with AI moment detection, face tracking and animated captions — and has free tools for subtitles, transcripts and video formats.
The same transcription powers ShortsHero's clip maker: it finds the strongest moments, reframes them to vertical and adds word-by-word captions in 36 styles.
Try the clip maker freeFree to start · No credit card required
Keep Going
Spell-check an SRT or VTT file in your browser. Every typo, repeated word and odd capital is flagged with a one-click fix, and timing stays as it was.
Split long subtitle lines automatically. Set a character limit like 42, and every cue is broken into balanced two-line subtitles with timing kept.
Convert SBV to TXT online. Upload a .sbv subtitle file and download a clean .txt file with every timestamp kept. Free, in-browser, no signup.
Convert ASS to SSA online. Upload a .ass subtitle file and download a clean .ssa file with every timestamp kept. Free, in-browser, no signup.
Convert SSA to ASS online. Upload a .ssa subtitle file and download a clean .ass file with every timestamp kept. Free, in-browser, no signup.
Convert DFXP to VTT online. Upload a .dfxp subtitle file and download a clean .vtt file with every timestamp kept. Free, in-browser, no signup.