Subtitle Retime
Have the right lyrics or subtitles but for the wrong take — a remix, a re-record, or a drifted translation? Upload the subtitle and the new audio; every line is kept exactly as written and only the timestamps move.
NewAI Aligned
Sign in or create a free account to re-align subtitles.
Upload subtitle
SRT · VTT · LRC · ASS · TTML · JSON — up to 5 MB
or drop your file here
SRT, VTT, LRC, ASS, SSA, TTML, SBV, JSON, XML · max 5.0 MB
Upload audio or video
MP3 / WAV / M4A / MP4 — up to 300 MB
or drop your file here
max 300 MB
Your text is preserved verbatim — this only re-times it, so there are no ASR wording errors. 2 credits.
Your re-aligned subtitle will appear here
Upload a subtitle and the new audio, then hit Retime. Timing is corrected against the audio while every line stays exactly as you wrote it.
Questions answered
Frequently asked questions
No. Retiming is forced alignment, not transcription: your lines are matched against the audio to find where each one is actually spoken or sung, and only the timestamps are rewritten. Every line comes back worded exactly as you wrote it.
SRT, VTT, ASS, SSA, TTML (including .xml and .dfxp), JSON and LRC. The re-aligned file is returned in the same format you uploaded — SRT in, SRT out.
You still get a result, plus a coverage score showing how much of your text was actually anchored to the audio. Below 60% coverage the result is flagged as low-confidence so you know the new timings may be unreliable — the job never silently rewrites your text to fit.
Two credits per job by default, and you need to be signed in because the alignment runs on our servers. The audio or video track can be up to 300 MB and 30 minutes; the subtitle file up to 5 MB. If the job fails or times out, the credits are refunded.