Trim audio by exact start and end time
Use the player to find the beginning of the section, choose Use current time, then do the same for the end. Decimal seconds help when a clean cut needs more precision than whole seconds.
Useful cuts for voice recordings and music
Remove a long introduction from a podcast, isolate a quote from an interview, cut dead space from a voice memo, or save one passage from a longer recording. For quiet gaps throughout a file, try the automatic silence remover.
Why the result downloads as WAV
The Web Audio API can decode many common formats, but browsers do not provide built-in MP3 or AAC encoders. SuperUtils creates an uncompressed PCM WAV locally for dependable, private output.
Frequently asked questions
How do I trim an audio file online?
Choose an audio file, enter the start and end times in seconds, preview the selection, and choose Trim and download WAV.
Can SuperUtils trim an MP3 without uploading it?
Yes. The browser decodes the source locally and creates a WAV download. The MP3 or other source file is not uploaded.
Why is the trimmed download a WAV?
WAV encoding works reliably in the browser without sending your audio to a conversion server. Re-encoding MP3 or M4A would require additional codecs.