How to use the Trim Audio
- Pick the recording you want to shorten.
- Enter the start and end times, either as plain seconds like 90 or as minutes and seconds like 1:30, with decimals allowed.
- Pick a fade of 0.5 to 3 seconds if you want soft edges, then trim and download.
Lossless cuts for most formats
MP3, AAC, M4A, WAV, FLAC and AIFF clips are made by copying the original data between your two times, so quality does not change. MP3 and AAC can only be split on frame boundaries, about 23–26 ms apart, which is too fine to hear.
Ogg Vorbis, Opus and WMA packets cannot simply be divided, so those clips are re-encoded at roughly the source bitrate after cutting.
Fades and ringtones
A fade is applied to both the beginning and the end. Since the volume is being shaped, a faded clip has to be re-encoded, at about its original bitrate and in the same format as before.
For an iPhone ringtone, stay under 30 seconds, run the clip through the audio converter as M4A and rename it to .m4r. Android takes MP3 ringtones as they are.
Several cuts in one go
Your start and end times are used for each queued file, so a batch of recordings can be shortened identically in one press. Each output gets “-cut” added to its name, and the ZIP button collects them.
To take several different parts from one long file, add it again for each part with its own times. The original recording is never altered; every clip is a new file.
Questions
Is there a waveform to drag?
No. Note the times in any player and type them here.
What if the end time is past the end?
Nothing breaks: the clip just stops where the recording stops.
Does trimming an MP3 lower its quality?
No, unless you add a fade. Without one, the frames are copied exactly between the two times you set.