Before opening the recording
Save the recording to a location your browser can access. On an iPhone, use Share in Voice Memos and save a copy to Files; on another device, locate the exported recording in its file picker. Your browser must support the file’s audio encoding.
The Sound Tools Audio Trimmer accepts files up to 40 MB and three minutes. Its processing happens on your device. A larger or longer recording needs to be shortened with another editor first.
Choose the start and end
Open Audio Trimmer and choose your file, or try the built-in example. Move the waveform boundaries to select the part to keep. For a precise cut, enter start and end times in the fields; the selected duration updates as you work.
Play the selection and loop it to check both ends. Do not cut directly into a consonant or the end of a breath. If the timing is hard to hear, the preview speed control can help you listen more closely.
Smooth the edges
An abrupt cut can produce a click. Try a short fade-in or fade-out and listen again. Use the shortest fade that solves the click without swallowing a syllable; a long fade may be obvious on speech.
Preview speed is for listening only. It does not change the speed of the downloaded or transferred selection. If you need to change the finished clip’s tempo, open Tempo Changer separately.
Choose a format and save
Export WAV when you want an uncompressed copy for further editing. Choose MP3 when a smaller, broadly supported file is more useful. Sound Tools encodes a new MP3 rather than performing a lossless MP3 cut, so keep the source if you may edit again.
Listen to the saved file once before sharing. If you need several clips in sequence, save them separately and arrange them in Audio Joiner. Always have permission to share other people’s recordings.
If the file will not open
Check the duration and file size first, then try another browser or export a new copy from the recording app. An extension such as .m4a identifies a container, not a guarantee that every browser can decode the audio inside it.