Does it change my subtitle text?

No. Retime is forced alignment, not transcription — every line stays exactly as you wrote it, and only the timestamps are recomputed against the new audio.

Which formats can I retime?

SRT, VTT, ASS/SSA, TTML, JSON, and LRC. The output is returned in the same format you uploaded.

What if the audio doesn't match the subtitle?

You'll get a low-coverage warning when few words match, so you can tell the timing may be unreliable — but the job still returns a best-effort re-alignment with your text intact.

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

Subtitle / LRC file

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 MB

New audio / video track

Upload audio or video

MP3 / WAV / M4A / MP4 — up to 300 MB

or drop your file here

max 300 MB

Language

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.