Audio Trimmer – Cut Audio Online

Trim MP3, WAV, FLAC, OGG, Opus and AIFF files online for free. Select start and end times, preview audio, and download. Private browser-based processing.

Your audio stays on your device.

AUDIO TRIMMER Your files stay on your device.

One file · 32 MB · Up to 10 minutes. Decoded PCM: 64 MB maximum, 16 MB on low-memory devices.

Export Settings

OutputOutput FormatCompression level

Advanced audio settings

Rate and channelsSample RateChannels

WAV, AIFF and FLAC avoid another lossy codec stage. Changing rate, channels or bit depth changes samples. Tags, artwork and other metadata are not preserved.

This tool needs WebAssembly, Web Workers and Web Audio playback support.

Processing happens locally in your browser. Your audio is never uploaded.

Original audio untouched. Verify local processing. Advertising makes separate requests.

How to Trim Audio Online

Upload one supported audio file. Check its duration, sample rate, channels and waveform.
Drag the Start and End handles or enter times. Use Play Selection to hear only the highlighted interval.
Choose an output format and settings, then select Trim Audio.
Preview the verified result and download a separate trimmed file. Use Edit Again to adjust the selection.

After trimming your recordings, use Audio Joiner to combine audio files in the order you choose.

How to Cut MP3 Files

Choose the section you want using its decoded waveform. MP3 output uses the existing LAME encoder with CBR 128, 192, 256 or 320 kbps, or VBR Standard, High or Best. Cutting re-encodes the selected samples and may reduce quality. Codec delay and padding can affect exact timing; keep the original recording.

Trim WAV and FLAC Audio

WAV, AIFF and FLAC preserve supported PCM samples when original rate and channels are kept and bit depth is sufficient. WAV and AIFF offer 16 or 24-bit output. FLAC compression changes size and speed rather than quality. Reducing bit depth, resampling or changing channels changes the samples.

Lossless vs Re-encoded Audio

Every export decodes, selects sample frames and encodes a new file. Uncompressed PCM and FLAC avoid another lossy codec stage. MP3, Ogg Vorbis and Opus use lossy compression; this tool does not offer a compressed-frame lossless cut. A lossless output cannot restore detail lost in a lossy source. Tags and album artwork are omitted.

Supported Formats

Input and output: MP3, WAV, FLAC, OGG Vorbis, Opus and AIFF. Input must contain supported mono/stereo audio with a known duration. WAV and native FLAC accept 8/16/24-bit PCM; AIFF accepts standard 16/24-bit PCM. MP3 uses MPEG Layer III. Ogg must be a single Vorbis or Opus stream. M4A/AAC, AIFC, chained streams and surround channels are excluded.

Privacy and Browser Processing

Your file is decoded once for editing. A bounded set of waveform peaks supports dragging without decoding again. Local workers encode and verify the selected result; no cloud audio service is involved. Remove the file or Reset to release playback samples and results. Cancellation stops the current worker. Optional anonymous statistics never include file names or audio samples.

Verify local processing · Audio software licenses, LAME source and relinking materials

BEFORE YOU START

Frequently Asked Questions

Is cutting MP3 audio lossless?

No. MP3, Vorbis and Opus output is decoded, trimmed and re-encoded. Another lossy encoding can reduce quality. WAV, AIFF or FLAC output avoids another lossy codec stage but cannot restore detail already lost in the original.

How precise are start and end times?

Times are converted to sample frames using the source sample rate. Both stereo channels use the same frames. Displayed times are rounded to milliseconds; lossy codecs can introduce delay or padding, so absolute millisecond accuracy is not promised for every format.

Can I trim M4A or AAC?

No. This version supports MP3 MPEG Layer III, PCM WAV, native FLAC, single-stream Ogg Vorbis and Ogg Opus, and standard PCM AIFF. M4A, AAC, ALAC, AIFC, chained streams, unknown durations and surround audio are not supported.

Are my files or audio samples uploaded?

No. Decoding, waveform calculation, cropping, encoding and output verification run locally in your browser. File names and audio content are not sent to analytics. Advertising and local engine downloads make separate requests.

What are the file and memory limits?

One file at a time, up to 32 MB and 10 minutes, with at most 64 MB of decoded PCM (16 MB on devices reporting 2 GB RAM or less). The full source must fit even for a short selection. Source playback and result playback consume additional bounded memory; complex files may still exceed your device resources.

Will tags, album artwork or original settings be preserved?

Metadata and artwork are omitted. Original sample rate and channels are defaults where supported. Opus always exports at 48 kHz; MP3 Auto keeps 48 kHz or uses 44.1 kHz for other rates. Planned output settings are shown before trimming. Changing rate, channels or bit depth changes samples.

Can I preview a format my browser does not play directly?

Yes, for supported files. The local audio engine decodes the source and exported file to playback samples, rather than relying on browser MP3, FLAC or AIFF container support. Web Audio, WebAssembly and Web Workers are required; playback starts only after you press a button.

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