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Audio Tools

Audio Trimmer

Trim and cut audio files with waveform editor, fade effects, and multiple output formats.

Your files stay on your device - processed locally via WebAssembly, never uploaded

Drop audio file or click to upload

MP3, WAV, OGG, FLAC, AAC, M4A, WebM

🔒 Your audio files are processed in your browser. OptiPix never hears your recordings.

What is the best free audio trimmer online?

OptiPix Audio Trimmer cuts MP3, WAV, and OGG files on a waveform editor with fade-in/out, processed locally via FFmpeg WebAssembly. Unlike mp3cut.net or Audio Trimmer sites, there is no upload, no file-size limit, and no ads around your audio.

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<iframe src="https://optipix.art/embed/audio-trimmer" width="100%" height="600" style="border:1px solid #e4e4e7;border-radius:8px;" title="Audio Trimmer by OptiPix" loading="lazy"></iframe>
<p style="font-size:12px">Free tool by <a href="https://optipix.art/audio-trimmer">OptiPix Audio Trimmer</a></p>

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About Audio Trimmer

Last updated: May 2026

OptiPix Audio Trimmer lets you cut and trim audio files directly in your browser. Upload MP3, WAV, OGG, FLAC, AAC, M4A, or WebM files and see a visual waveform display. Drag selection handles on the waveform to choose exactly which part to keep or remove. Add fade-in and fade-out effects for smooth transitions. Export in multiple formats including MP3, WAV, OGG, FLAC, and AAC with adjustable bitrate. The waveform editor supports zoom, precise time input, and keyboard shortcuts for frame-accurate editing. Uses FFmpeg.wasm for high-quality encoding - everything runs locally in your browser. Your audio files are never uploaded to any server.

How It Works

The tool decodes your audio file using the Web Audio API to generate a visual waveform. You select the segment using draggable handles or precise time inputs. FFmpeg.wasm then encodes the selected segment with your chosen format, bitrate, and fade effects - all running locally in your browser.

Use Cases

  • •Cut a song segment for a ringtone
  • •Trim podcast intros and outros
  • •Extract a clip for TikTok or Instagram
  • •Remove silence from voice recordings
  • •Create audio samples for music production

You Might Also Like

If you find Audio Trimmer useful, check out these related tools: Audio Converter, Audio Merger, and Ringtone Maker. All tools run entirely in your browser with no uploads or signups required.

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Frequently Asked Questions

What audio formats are supported?
MP3, WAV, OGG, FLAC, AAC, M4A, and WebM. You can export in any of these formats regardless of the input format.
Can I add fade effects?
Yes. Adjustable fade-in (0-5 seconds) and fade-out (0-5 seconds) for smooth transitions at the cut points.
Is my audio uploaded to a server?
No. All processing happens locally in your browser using FFmpeg.wasm. Your audio files never leave your device.
Can I make precise cuts?
Yes. Use the waveform zoom, drag handles, or type exact timestamps in the start/end fields for frame-accurate trimming.
What bitrate options are available for MP3?
128, 192, 256, and 320 kbps. Higher bitrate means better quality but larger file size.
How do I cut an MP3 file for free?
Drop the MP3 into OptiPix Audio Trimmer, drag the start and end handles on the waveform, and export. FFmpeg runs in your browser, so trimming is free with no upload, no file-size limit, and no ads around your audio, unlike mp3cut-style websites.
How do I trim audio without losing quality?
Export to WAV for lossless output, or trim with stream copy so the original MP3 data passes through uncut where possible. Avoid repeatedly re-encoding lossy formats, since each pass loses quality. OptiPix Audio Trimmer processes locally with quality-preserving settings and shows the waveform for precise cuts.
How do I add a fade-out to a song?
In OptiPix Audio Trimmer, set your trim points and enable fade-out: the last second or two ramps smoothly to silence instead of cutting abruptly. Fade-in works the same at the start. This is the standard polish for ringtones, podcast clips, and presentation music beds.
Can I trim audio on my phone without an app?
Yes. OptiPix Audio Trimmer runs in mobile browsers: open the page, pick the file, trim on the waveform, and download. No app install, no account, and the audio never uploads, since FFmpeg WebAssembly runs on the phone itself. It works on both iOS Safari and Android Chrome.
Is it safe to trim private recordings online?
Only with a local tool. OptiPix trims audio entirely on your device, so voice memos, meeting recordings, and interviews are never transmitted to a server. Upload-based trimmer sites receive your full recording first; for anything confidential, in-browser processing is the only approach that keeps the audio in your control.

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