MP3 剪切器 — 免費、無需上傳
在瀏覽器中剪切 MP3，提供波形預覽、淡入淡出與 iPhone 鈴聲 39 秒預設。100% 本機處理，無上傳、無伺服器、無檔案大小限制。
How to cut an MP3
- Click Choose file and open your audio file (MP3, WAV, OGG, FLAC, or M4A). The waveform loads automatically — nothing is uploaded anywhere.
- Drag the Start slider and the End slider to mark the section you want to keep. The blue highlighted region on the waveform shows exactly what will be in the output.
- Optionally tap iPhone ringtone preset (39 s) to snap the end point to exactly 39 seconds after the start — the maximum iPhone ringtone length.
- Set Fade-in and Fade-out if you want the audio to ramp smoothly rather than start or stop abruptly.
- Click Cut & Download MP3. FFmpeg WebAssembly re-encodes the selected section as a new MP3 file. When the progress bar finishes, click Download MP3 to save the result.
Why cut MP3 in the browser?
Most online MP3 cutters upload your file to a remote server — slow on a mobile connection, risky for unreleased music or personal recordings, and subject to file-size caps. This tool runs the entire process inside your browser tab using FFmpeg compiled to WebAssembly. No bytes are sent to any server, there is no file-size limit, and the process is as private as opening a file in a desktop app.
The iPhone ringtone preset (39 seconds) marks the exact window you need to import into GarageBand and export as an .m4r ringtone — the same feature mp3cut.net charges for, available here for free.
Related music tools
- Audio Trimmer — cut any audio to exact start/end, output lossless WAV
- Audio Merger — join multiple audio files into one track
- WAV to MP3 Converter — convert full WAV recordings to MP3 with bitrate control
- Volume Normalizer — boost or reduce audio volume before cutting
- Audio Fade — add smooth fade-in and fade-out to any audio file
More ways to use this tool
- Cut MP3 Online — trim any MP3 in your browser, no software installation needed
- MP3 Ringtone Cutter — cut a 39-second clip from any song for an iPhone ringtone
- MP3 Trimmer No Upload — private, local MP3 trimming with fade in/out and bitrate control
- MP3 Song Cutter — isolate the best part of any song and save it as a standalone clip
- Audio Cutter Free — cut MP3, WAV, and OGG files without installing any software
常見問題
- Does my audio file get uploaded to a server?
- No. The tool uses the Web Audio API for waveform display and FFmpeg compiled to WebAssembly for cutting. Your file stays in the browser tab and is never sent to any server at any point.
- Will the audio quality change after cutting?
- The selected portion is re-encoded as a new MP3. At 192 kbps or 320 kbps the quality is indistinguishable from the source in a blind test. For a lossless result, use the WAV trimmer at /audio/trim/ and keep the WAV output.
- What is the iPhone ringtone preset for?
- iPhone ringtones must be 39 seconds or shorter. The preset snaps the End time to exactly 39 seconds after the current Start position, matching the maximum allowed ringtone length. You can then import the result into GarageBand and export it as an .m4r file.
- What do the fade-in and fade-out controls do?
- Fade-in gradually increases the volume from zero at the beginning of the cut. Fade-out gradually decreases the volume to zero at the end. Both make the edit sound natural rather than a sudden cut.
- Which audio formats can I cut?
- The tool accepts any format your browser can decode: MP3, WAV, OGG, FLAC, AAC/M4A, and WebM. Chrome and Firefox support the widest range of formats. The output is always an MP3 file.
- Does it work on iPhone and Android?
- Yes. The tool works in Safari on iPhone (iOS 16+) and in Chrome and Firefox on Android. Decoding a very large file (several hundred MB) may take a moment on lower-end devices before the waveform appears.
Last updated: By jarvisbox