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Audio Trimmer

Trim and export a section of an audio file

Updated

What is the Audio Trimmer?

Quickly and precisely trim your audio files right in your browser. Our Audio Trimmer lets you load any common audio format, visualize the waveform, and select the exact segment you want to keep.

Whether you are trimming a podcast clip or a voice recording, you can add fades, adjust gain, and export the selection as PCM WAV. The tool decodes and re-encodes the audio; exporting a lossy source as WAV does not restore quality lost in the original encoding.

Best of all, everything happens locally on your device. Your files are never uploaded to a server, ensuring complete privacy and instant processing speeds.

How it works

  1. Upload Your Audio: Drag and drop your audio file (MP3, WAV, OGG, M4A, FLAC) into the dropzone. The tool processes the file locally, so no internet connection is required for the actual editing.
  2. Visualize the Waveform: Once loaded, an interactive waveform displays your audio's dynamics. You can zoom in for micro-edits or zoom out to see the entire file at a glance.
  3. Select Your Segment: Click and drag on the waveform to create a selection. Grab the edge handles or use the arrow keys to adjust the start and end times. The selection is time-based rather than frame-based.
  4. Apply Effects: Add a professional touch by applying fade in or fade out effects to smooth transitions. Use the gain slider to boost or lower the volume of your selection.
  5. Preview and Export: Play the selection to check your edits. Choose the output bit depth, sample rate, and channel count, then export a PCM WAV file. The output is re-encoded, and converting a lossy source to WAV cannot restore discarded audio data.

Examples

Extract a podcast intro

Isolate the first 30 seconds of a podcast episode to use as a standard intro.

60-minute podcast.mp3
 
30-second intro.wav

Create a custom ringtone

Trim a specific chorus from a song and export it as a compact audio file.

full_song.flac
 
chorus_ringtone.wav

Remove dead air from a recording

Cut out the silence at the beginning and end of a voice memo.

voice_memo.m4a
 
trimmed_memo.wav

Frequently asked questions

Is my audio file uploaded to a server?

No. This audio trimmer runs entirely in your browser. Your files are processed locally on your device, which means they are never uploaded, stored, or shared on any external server. This ensures maximum privacy and security.

What audio formats can I import?

You can import any audio format that your browser natively supports via the Web Audio API. This typically includes MP3, WAV, OGG, M4A, and FLAC. The exact formats supported may vary slightly depending on whether you are using Chrome, Firefox, Safari, or Edge.

What format is the exported file in?

The tool exports a PCM WAV file. You can choose the output bit depth, sample rate, and channel configuration (mono or stereo). WAV stores uncompressed audio, but exporting a lossy source such as MP3 does not recover quality lost during its original encoding.

How do I make precise cuts?

Use the waveform handles or keyboard arrows to adjust the selection times. Arrow-key adjustments are time-based, not tied to video frames.

Can I add fade in and fade out effects?

Yes. Below the waveform, you will find sliders for both Fade In and Fade Out. You can adjust these to smoothly ramp the volume up at the beginning of your selection and down at the end, preventing sudden clicks or pops in your final audio file.

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