100% Private
Your audio is processed directly on your device. Nothing is uploaded, so your content remains completely confidential.
Audio Clipper & Trimmer
Easily cut and trim audio files online for free. Select a start and end time, preview your clip, and download without watermarks. All processing is done in your browser for 100% privacy.
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An audio clipper trims and cuts audio files to extract specific segments. You can set start and end points, preview the selection, and export the clip as WAV or MP3. This tool uses the browser's Web Audio API for precise, sample-accurate editing -- all processing happens locally in your browser, making it safe for unreleased music, podcasts, or voice recordings.
Cut and trim audio without uploading your files
Visual waveform, precise start/end selection, MP3 or WAV output. No watermarks, no sign-up — all processed locally in your browser.
Precise trimming
100% private
Free no-watermarks
How to use
- 1
Upload Audio
Drag your audio file onto the page or click to select it from your computer.
- 2
Set Time Range
Adjust the start and end sliders to highlight the exact part of the audio you want to keep.
- 3
Select Format & Quality
Choose your output format (MP3 or WAV) and audio bitrate. Higher bitrates mean better quality but larger file sizes.
- 4
Process & Preview
Click 'Clip Audio'. Your browser will process the file and show you a preview of the final cut.
- 5
Download
Click the download button to save your new audio clip as an MP3 or WAV file.
Simple, Private, and Powerful
Precise Control
Use the intuitive sliders to select the exact start and end points for your clip, with a real-time preview of the duration.
No Watermarks
Download your final audio clip for free, with no watermarks or branding added.
Lossless Trimming
The tool performs a lossless cut — no re-encoding, no quality loss when keeping the same format.
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Understanding Audio Clipping
How digital audio works
Digital audio represents sound as a sequence of discrete samples -- numerical values that describe the air pressure at each point in time. The sample rate (typically 44100 or 48000 Hz) determines how many samples per second are recorded. Each sample has a bit depth (typically 16-bit or 24-bit) that determines the dynamic range. A 3-minute song at 44.1 kHz, 16-bit, stereo has about 8 million samples per channel. Audio clipping (trimming) simply means selecting a subset of these samples and discarding the rest.
The Web Audio API provides the AudioContext interface, which can decode audio files (MP3, WAV, OGG, M4A) into raw PCM (pulse-code modulation) sample data stored in an AudioBuffer. This buffer contains the sample data as Float32Array values (-1.0 to 1.0) for each channel. To clip the audio, the tool copies the samples between the start and end positions into a new AudioBuffer, which is then encoded back into a file format using a WAV encoder or an MP3 encoder (lame.js).
For sample-accurate editing, the start and end positions are specified in samples (or seconds, which are converted to samples by multiplying by the sample rate). This allows precise cuts at any point in the audio -- essential for music production where a cut even a few samples off the beat is noticeable. The Web Audio API also provides real-time playback via AudioBufferSourceNode, allowing you to preview the selection before exporting.
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Audio formats and quality
WAV is the best format for audio clips because it's lossless -- the clip is an exact copy of the original samples. WAV files are uncompressed, so they're large (about 10 MB per minute at 44.1 kHz, 16-bit, stereo). MP3 is a compressed format that uses psychoacoustic models to discard sounds humans can't hear, achieving 10:1 compression with minimal quality loss. For voice recordings and podcasts, MP3 at 128 kbps is sufficient. For music, use 192-320 kbps.
When clipping MP3 files, there's a technical consideration: MP3 encodes audio in frames of 1152 samples. Cutting at a frame boundary is fast and lossless (no re-encoding), but cutting between frame boundaries requires re-encoding, which introduces generational loss. Our tool re-encodes the clip for precise control, which is acceptable for most use cases. For professional audio editing where generational loss is unacceptable, use WAV source files and export to WAV.
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How does this compare to other audio clippers?
A side-by-side comparison of popular audio editing tools.
| Feature | NovaTools | mp3cut.net | Audacity (desktop) |
|---|---|---|---|
| Privacy (no upload) | 100% browser | Uploads to server | Local |
| No installation | Web-based | Desktop app | |
| Sample-accurate editing | |||
| WAV export | |||
| MP3 export | (via LAME) | ||
| Real-time preview |
Online audio editors like mp3cut.net require uploading your audio files to their servers. Our tool uses the Web Audio API to decode, edit, and encode audio entirely in your browser -- suitable for unreleased music, confidential podcasts, or private voice recordings.
FAQ
Are my audio files uploaded to a server?
No. Our tool works entirely in your web browser using the Web Audio API and MediaRecorder API. Your audio files are loaded directly into the browser's memory, decoded for waveform visualization, trimmed according to your start/end selection, and re-encoded as a new audio file — all on your device. The files are never uploaded, stored, or transferred to our servers. When you close the browser tab, all audio data is cleared from memory. This makes the tool safe to use for confidential voice recordings, proprietary music tracks, podcast drafts, or sensitive interview audio where data privacy is a concern.
Is this audio trimming tool free?
Yes, this tool is completely free to use without any limitations or watermarks on your final audio. There are no premium tiers, no daily usage caps, no sign-up requirements, and no attribution required. You can trim as many audio files as you need, as often as you need, for personal or commercial use. The tool is sustained by non-intrusive advertising rather than paywalls. The output files are yours to use however you see fit — there are no license restrictions on the trimmed audio.
What format is the output audio file?
You can choose between MP3 (compressed, smaller file) or WAV (uncompressed, high quality) formats. MP3 is recommended for most use cases — it produces files that are 5-10x smaller than WAV while maintaining near-CD quality at 192kbps or higher bitrates. WAV is recommended when you need lossless quality for professional audio editing, podcasting, or archival purposes. Both formats are compatible with virtually all devices and software. The tool uses the browser's built-in audio encoders for MP3 and WAV, so the output quality depends on your browser's implementation. For best results, use a modern version of Chrome, Edge, or Firefox.
What audio formats can I upload?
The tool supports any audio format that your browser can decode — typically MP3, WAV, OGG/Vorbis, M4A/AAC, FLAC, and WebM/Opus. The exact set of supported formats depends on your browser and operating system. Chrome and Edge generally support the widest range of formats. If your file is in an unsupported format (e.g., WMA, AIFF, or AMR), you may need to convert it to MP3 or WAV first using a dedicated audio converter. The tool will display an error message if it cannot decode your file.
How precise is the trimming?
The tool provides millisecond-level precision for start and end points. The waveform visualization lets you see the audio's amplitude over time, making it easy to identify silence, speech, or music sections. You can drag the start and end handles on the waveform to select the exact portion you want to keep, or type specific time values in the input fields. A real-time duration display shows the length of your selected clip as you adjust the handles. For even more precision, you can zoom into the waveform to see individual audio frames.
Will trimming affect audio quality?
No. The tool performs a lossless cut operation — it does not re-encode the audio when trimming. Instead, it copies the exact audio frames within your selected range and wraps them in a new container. This means the trimmed audio has the exact same quality as the original file, with no generation loss, no compression artifacts, and no changes to the sample rate or bit depth. The only exception is when you change the output format (e.g., from WAV to MP3) — in that case, the tool must re-encode the audio, which may introduce minor quality changes depending on the bitrate you select.
Can I preview the clip before downloading?
Yes. After selecting your start and end points, click the 'Preview' button to listen to the selected portion of the audio. The preview plays from the start point to the end point, with a moving playhead indicator on the waveform so you can see exactly where you are in the clip. You can adjust the start and end handles while the preview is playing, and the preview will automatically update to reflect the new selection. This makes it easy to fine-tune your clip until it sounds exactly right before downloading.
Is there a file size limit?
There is no artificial file size limit imposed by the tool. Since all processing happens in your browser's memory, the practical limit depends on your device's available RAM. Most modern computers can handle audio files up to 100-200 MB without issues (roughly 1-2 hours of MP3 at 192kbps or 10-20 minutes of WAV). Very large files may cause the browser to become temporarily unresponsive during the initial decoding phase. If you encounter issues, try trimming a shorter section of the audio rather than loading the entire file.
Your Privacy is Our Priority
This tool runs entirely in your browser using the Web Audio API and MediaRecorder API.
- We do not upload, store, or analyze your files.
- Everything you process stays on your device.
- The tool reads your audio file from local memory, decodes it for waveform visualization, performs the trim operation by copying the selected audio frames, and re-encodes the output file — all without any network requests.
- There are no server-side logs capturing your audio filenames or clip durations, no analytics tracking your usage patterns, and no persistent storage of any kind.
- When you close the browser tab, all audio data and waveform visualizations are cleared from memory immediately.
- This makes the tool safe to use for confidential voice recordings, proprietary music tracks, podcast drafts, interview audio, and any scenario where audio data should not be exposed to third-party servers.
- The tool also works offline after the initial page load.
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