Audio Trimmer
Open an audio or video file, set the start and end, and download the clip. Nothing is uploaded. Every clip is named by where it started and ended in the original, like interview_12m04s-15m30s.wav. So when the clip's transcript says 02:10, add 12:04 and you know where that is in the full recording.
By Eman Khoubian, Founder & CEO
or drop it here · up to 1 GB
Find any line from the clip in the full recording
A clip's own clock starts again at 0:00. Transcribe it and every time in the transcript counts from the start of the clip, not from the start of the interview, lecture or call it came from. Weeks later, when someone asks for that quote in context, the transcript points at the wrong place.
The file name is the way back. Add its start time to any time in the clip's transcript and you're at the same line in the original. If the seconds go past 59, add a minute: 12:04 plus 2:58 comes to 14:62, which is 15:02.
A clip's 02:10 is the original's 14:14
The times in the name are whole seconds, rounded down, so the spot you land on can be up to a second early. Play on from there. And if you rename the clip, keep the times in the new name. Once they're gone, so is the link to the original.
When to trim, and when to transcribe the whole file
Trim when you need one stretch and nothing else: one answer from a 90-minute interview, the part of a lecture the exam covers, the part of a call after everyone has joined. On WhisperAI's free plan, which transcribes 5 minutes a month, a trimmed clip spends those minutes on the part that matters.
If there's any chance you'll want more of it later, transcribe the whole file. WhisperAI takes files up to 5 GB on every plan, so there's no size reason to cut first, and Business Pro transcribes unlimited minutes for $24.99 a month. Every timestamp in a full transcript is already the original's, so there's no sum to do.
Recording something new? Use the online voice recorder, and check your microphone first with the mic test.
What it opens and what you download
The trimmer opens files up to 1 GB and 2 hours long, in any format your browser can read. In Chrome that includes MP3, WAV, M4A and the sound of an MP4 video. Recordings longer than 20 minutes open and save at 16 kHz instead of 48 kHz.
The clip downloads as a WAV file. If you open an MP3 or M4A, the part you keep isn't compressed a second time. WAV files are bigger: at 48 kHz stereo a minute is about 11.5 MB. If you need a small MP3 to share, convert the clip after you cut it.
When the clip is ready, turn it into text and keep its file name next to the transcript.