Free Audio Cutter

Trim and cut audio files instantly in your browser. Waveform editor, fade effects, precise timestamps. No uploads, 100% private.

Your files stay on your device. Nothing is uploaded to any server.

Drop an audio file here, or click to browse

Supports MP3, WAV, OGG, AAC, FLAC, M4A

How to Cut Audio Files Online

Audio cutting is one of the most fundamental editing operations. Whether you need to trim silence from the beginning of a podcast, extract a chorus from a song, cut a ringtone from a track, or remove an unwanted section from a recording, an audio cutter is the tool you reach for first. Our browser-based audio cutter gives you the precision and features of desktop software without installing anything.

Unlike most online audio cutters that require uploading your files to a server, our tool runs entirely in your browser using the Web Audio API. This means your audio files never leave your device, processing is instant regardless of your internet speed, and there are no file size limits imposed by server constraints.

Understanding the Waveform

When you load an audio file, the tool decodes it and renders a visual waveform. The waveform shows the amplitude (volume) of the audio over time. Tall peaks represent loud sections, while flat areas indicate silence. This visual representation makes it easy to identify exactly where to cut — you can see the start of a vocal, the beat drop in a song, or a gap between sentences in a speech.

The highlighted region between the two handles shows your selection — the portion of audio that will be included in your export. Drag the handles to adjust the selection, or click anywhere on the waveform to move the playhead. The red playhead line shows your current position during playback.

Fade In and Fade Out

Abrupt audio cuts can sound jarring, especially when the audio is mid-note or mid-word. Fade effects solve this by gradually increasing (fade in) or decreasing (fade out) the volume over a specified duration. A 0.5-second fade is enough to eliminate clicks and pops. A 2-3 second fade creates a smooth, professional transition that works well for music and podcasts.

Our fade controls range from 0 to 5 seconds. The fades are applied during the export process, so you can experiment with different fade durations without affecting the original audio. For ringtones, a 0.3-second fade in and 1-second fade out is a popular combination.

Export Formats

WAV (Waveform Audio) is the recommended export format when quality matters. WAV files are uncompressed and lossless, meaning the trimmed audio is bit-for-bit identical to the original in the selected region. WAV files are larger (approximately 10 MB per minute for stereo audio at 44.1 kHz), but they preserve every detail. Choose WAV when you plan to do further editing or when audio quality is paramount.

MP3 export uses your browser’s MediaRecorder API to create a compressed file. This produces smaller files suitable for sharing, uploading, or use as ringtones. Note that browser support for MP3 encoding varies — some browsers will produce WebM/Opus output instead, which is also compact and widely supported.

Common Uses for Audio Trimming

Ringtone creation: Most phone ringtones are 15-30 seconds long. Load your favorite song, find the section you want, set a short fade in and fade out, and export as WAV. Transfer the file to your phone and set it as your ringtone.

Podcast editing: Remove long silences, false starts, or tangents from podcast recordings. The waveform makes it easy to spot silent gaps and cut them precisely.

Music sampling: Extract specific sections of songs for use in DJ sets, mashups, or creative projects. The precise timestamp inputs let you cut to the exact beat.

Voice memo cleanup: Trim the beginning and end of voice recordings to remove the sounds of pressing start/stop or background noise before the speaker begins.

Frequently Asked Questions

How do I cut an audio file online?
Upload your audio file (MP3, WAV, OGG, AAC, FLAC, or M4A), then drag the selection handles on the waveform to choose the portion you want to keep. You can also type exact start and end times for precision. Click "Download Trimmed Audio" to save your cut. Everything runs in your browser — no uploads needed.
Does trimming audio reduce quality?
When you export as WAV, the audio is lossless — there is zero quality loss. The trimmed file contains the exact same audio data as the original, just shorter. If you export as MP3 via MediaRecorder, there may be a slight re-encoding, but at high bitrates the difference is negligible.
What audio formats can I trim?
Our audio cutter supports all major formats: MP3, WAV, OGG, AAC, FLAC, and M4A. Any format that your browser can decode via the Web Audio API will work. The output can be saved as lossless WAV or compressed via MediaRecorder.
Is it safe to cut audio files online?
Absolutely. Our tool processes everything directly in your browser using the Web Audio API. Your audio files are never uploaded to any server. When you close the tab, all data is cleared from memory. There is no server infrastructure to receive your files.
How do I add a fade in or fade out?
Use the Fade In and Fade Out sliders in the Export Options section. You can set fades from 0 to 5 seconds. Fades are applied during export, creating smooth volume transitions at the start and end of your trimmed clip.
Can I trim large audio files?
Yes. Since all processing happens in your browser using the Web Audio API, there are no server-side file size limits. Performance depends on your device's memory and processing power. Files up to several hundred MB typically work without issues on modern devices.

Last updated: March 2026

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