Start and end positions can be adjusted in hundredths of a second.
CUT / AVAILABLE NOW
Audio Trimmer
Keep only the good part. Set precise start and end points on a readable waveform, preview, then export.
CUT / dedicated toolFiles never leave this tab
00:00LOCAL BUFFER--:--
Preview controls appear after you add or generate audio.
GUIDE / trim audio online
What is an online audio trimmer?
An online audio trimmer keeps a selected time range from a longer recording. In SoundTools, you choose start and end points to one-hundredth of a second, process the selection inside your browser, preview the exact result, and export it as WAV. The original file stays on your device and is never uploaded.
FIELD NOTES / 01
Cut the useful moment, keep the source private
The workbench draws a waveform from the decoded source and provides separate start and end controls. Each control moves in 0.01-second steps, and the selection readout shows the resulting duration before you process the cut.
Trimming creates a new audio buffer containing only the selected sample range. It does not overwrite the original file, remove a middle section, add fades, or join clips. This focused behavior makes it suitable for extracting one clean section quickly.
PROCESS / THREE STEPS
How to trim audio online
- 01
Open a compatible recording
Choose an MP3, WAV, M4A, AAC, or OGG file. The source is decoded in the tab, and its waveform and total duration appear in the workbench.
- 02
Set the start and end
Move the two time controls to define the section you want to keep. Leave at least 0.05 seconds between the markers and check the selection duration.
- 03
Process, preview, and export
Create the trimmed result, listen to it beside the original, then download the selected section as a WAV file if the boundaries sound right.
SIGNAL NOTES / VERIFIED BEHAVIOR
What this tool actually does
Clear limits are part of a useful tool. These values describe the processor currently running in this page.
The controls preserve a small valid selection between the two boundaries.
The kept sample range is exported locally with the source sample rate and up to two channels.
USE CASES / 02
Useful reasons to cut an audio file
- Remove dead air
Drop silence or setup chatter from the beginning and end of a voice note, interview, or lecture.
- Extract a short clip
Keep one quote, musical phrase, sound effect, or reference section from a longer recording.
- Prepare a clean handoff
Create a focused WAV segment before moving it into a video editor, sampler, presentation, or transcription workflow.
QUESTIONS / PRACTICAL ANSWERS
Questions about this tool
Answers based on the current browser processor—not promises about a future version.
01Can I preview the trimmed audio before downloading?
Yes. After processing, the result player appears beside the original player so you can hear the exact selected section before saving it.
02How precise are the trim controls?
The start and end sliders move in 0.01-second increments. The final cut is aligned to the nearest sample available at the source sample rate.
03Can I remove a section from the middle?
Not in this focused trimmer. It keeps one continuous range between the selected start and end points. Removing a middle section requires a multi-cut editor.
04Does trimming reduce audio quality?
The browser decodes the source and exports the selected samples as a 16-bit WAV. It does not preserve the original compressed MP3 or M4A bitstream.
05Does SoundTools upload the file?
No. Decoding, trimming, previewing, and WAV creation happen locally in your browser tab.