Audio Cutter
Cut audio clips, trim songs, and create MP3 ringtones with millisecond precision. Adjust start and end points locally in your browser with zero file uploads.
MP3, WAV, M4A, AAC, OGG, FLAC · up to 500 MB
Tips
- Drag across the visual waveform to set your start and end cut points quickly.
- Select a 25 to 30 second segment with a short fade out when creating custom ringtones.
- Enter timestamps manually in hours, minutes, seconds, and milliseconds for exact trimming accuracy.
How to use it
- 1 Select or drag your audio file into the workspace to generate the visual waveform.
- 2 Adjust the start and end markers by dragging the waveform handles or entering exact timestamps.
- 3 Preview your selected audio segment to verify the cut boundaries.
- 4 Export and save the trimmed segment directly to your device as an MP3 file.
What you should know
Trimming audio is essential for creating custom smartphone ringtones, removing dead air from podcast recordings, or isolating specific musical samples. Raw or compressed audio tracks often contain extraneous metadata, variable bitrates, or introductory silence that inflate file sizes and delay playback. Modern operating systems and mobile devices require universally supported, lightweight containers like MP3 to guarantee compatibility across media players. Decoding audio directly into uncompressed PCM buffers allows precise waveform inspection and sample-level cut boundaries. Re-encoding trimmed segments to standardized bitrates ensures predictable storage size while maintaining acoustic fidelity across stereo playback channels.
This tool decodes your source audio locally through the browser audio engine, letting you define clip boundaries visually on an interactive waveform or via millisecond timestamps. Once you mark the start and end markers, a pure JavaScript encoder converts the selected PCM slice into a standalone MP3 file without sending data to an external server. Original multi-track stems, embedded artwork, and legacy container tags are discarded during extraction, delivering a streamlined audio file. Because decoding and encoding occur entirely in client-side memory, exceptionally long recordings may depend on available system RAM.
Frequently asked questions
Does trimming reduce the sound quality of my audio?
The tool decodes your original audio to raw samples and re-encodes the selected portion as an MP3. While re-encoding lossy formats involves standard compression, the output maintains high acoustic fidelity suitable for general listening and ringtones.
Is there a file size or duration limit for trimming?
There is no artificial file size cap, but performance depends on your device memory because decoding occurs inside your browser. Files up to several hundred megabytes process smoothly on modern hardware.
Are my audio recordings uploaded to any remote server?
No, all audio decoding, waveform rendering, and MP3 encoding run entirely within your local browser engine. Your files never leave your computer or mobile device.
Guides
Articles and format references related to this tool.
Related tools
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- Audio Fade In Out Apply smooth audio fade in and fade out effects by setting custom durations in seconds. Process files privately inside your browser without uploading.
- Audio Speed and Pitch Change audio playback speed and pitch independently or preserve natural vocal tone during tempo shifts. All processing runs entirely inside your web browser.
- FLAC to MP3 Converter Convert FLAC audio files to MP3 format directly in your browser. Reduce file size for any media player while your audio remains private on your own device.
- M4A to MP3 Converter Convert M4A and AAC audio files to universal MP3 format directly in your browser. Fast local processing with no server uploads or file size restrictions.
- WAV to MP3 Convert uncompressed WAV files to MP3 audio directly in your browser. Select your preferred bitrate and download encoded tracks with zero server uploads.