Audio Splitter

About Audio Splitter

This free online audio splitter lets you split any audio file into multiple parts. Whether you need to divide a long recording into chapters, cut an album rip into individual tracks, split a podcast at chapter marks, or extract interview segments, this tool makes it easy. Split by number of parts, fixed duration, target file size, or your own custom timestamps for non-uniform, sample-accurate cuts. Use it for mastering deliverables, DAW import within track limits, or to fit podcast platform upload caps. Everything processes 100% in your browser using the Web Audio API - no upload, files never leave your device, and output is lossless WAV with gapless, sample-exact boundaries.

What audio formats are supported?

All common audio formats are supported including MP3, WAV, OGG, AAC, M4A, FLAC, OPUS, and more. The tool can process any format your browser supports.

What are the different split modes?

There are four split modes:
1) Split by Parts: Divide audio into a specific number of equal parts (e.g., split into 3 parts)
2) Split by Duration: Create parts of a specific length (e.g., 60 seconds each)
3) Split by Size: Create parts with approximate file size (e.g., 5MB each - note this is approximate as audio compression varies)
4) Split at Custom Timestamps: Define your own cut points (e.g., 0:30, 1:15, 2:00) for non-uniform segments

Can I split at custom timestamps or cue points?

Yes. Choose the 'Split at Custom Timestamps' mode and enter one cut point per line as mm:ss, hh:mm:ss or raw seconds (e.g., 0:30, 1:15, 2:00). The tool sorts and de-dupes your marks, then creates a part between each consecutive pair plus the start and end. This is ideal for cutting a continuous DJ mix or album rip into individual tracks, splitting a podcast at chapter boundaries, or extracting named interview segments where each part has a different length.

Are the cut points sample-accurate or frame-quantized?

Cuts are sample-accurate. Timestamps are converted to a sample index (seconds x sample rate) and the segment is copied sample-by-sample from the decoded PCM data, so there is no MP3-frame quantization. Consecutive parts share no overlap and no gap, meaning they are gapless and rejoin seamlessly into the original waveform.

Why is the output WAV instead of MP3?

Output is 16-bit PCM WAV because the splitter copies the decoded audio directly without re-encoding, so there is zero generation loss. MP3 would require lossy re-compression of every part. The tradeoff is larger files (WAV is uncompressed), but the audio is bit-for-bit lossless and ready for mastering or DAW import. Convert to MP3 afterwards if you need smaller files.

Are the sample rate and channels preserved?

Yes. Each part keeps the original sample rate (e.g., 44100 or 48000 Hz) and channel layout (mono stays mono, stereo stays stereo). The split only trims the timeline; it never resamples or downmixes.

How does Split by Parts work?

Split by Parts divides your audio into equal segments. For example, if you have a 10-minute audio file and choose 5 parts, each part will be 2 minutes long. This is useful when you need a specific number of files regardless of their duration.

How does Split by Duration work?

Split by Duration creates parts of a specific length. For example, if you choose 60 seconds, the audio will be split into 1-minute segments. The last segment may be shorter if the total duration doesn't divide evenly. Perfect for podcasts, lectures, or creating music samples.

How does Split by Size work?

Split by Size attempts to create parts with approximately the specified file size. Note that this is an estimate because audio compression efficiency varies based on the content. The actual file sizes may vary slightly. This mode is useful when you have file size limits for uploads or storage.

What can I use audio splitting for?

Common uses include: 1) Dividing long recordings or podcasts into episodes or chapters, 2) Creating audio samples or previews, 3) Splitting albums into individual tracks, 4) Breaking large files into smaller parts for easier sharing or uploading, 5) Creating segments for video editing, 6) Extracting specific sections from lectures or interviews.

Can I preview the parts before downloading?

Yes! Each split part has a preview player so you can listen to verify the split was done correctly before downloading.

How do I download the split parts?

You can download individual parts one by one using the Download button for each part, or download all parts at once as a ZIP file using the 'Download All Parts' button. The ZIP file is convenient when you have many parts.

What output formats are available?

Currently, the tool outputs WAV format which is lossless and ensures perfect quality. WAV files are larger but maintain the exact audio quality from your original file. In future updates, we may add compressed formats like MP3.

Will splitting affect audio quality?

No! The splitting process doesn't degrade audio quality. The tool extracts segments from the original audio data without re-encoding, so quality is preserved perfectly. Each part is an exact copy of that portion of the original audio.

What's the maximum file size?

The maximum file size is 100MB. For very large files, processing may take more time and require more memory. If you have files larger than 100MB, consider compressing them first or using desktop software.

How many parts can I split into?

You can split into 2 to 100 parts. For very large numbers of parts, the individual segments will be very short. Typically, 2-20 parts is most practical for most use cases.

Is my audio file safe and private?

Absolutely! All processing happens directly in your browser using the Web Audio API. Your audio file is never uploaded to any server. Everything stays completely private on your device. Once you close or refresh the page, all data is cleared from memory.

What if the split doesn't divide evenly?

When splitting by parts, the audio is divided as evenly as possible. When splitting by duration, the last part may be shorter than the specified duration if there isn't enough audio left. This is normal and expected behavior.