MP3 Cutter & Audio Cutter

Choose an audio file first. Once decoded, the waveform and selection controls expand so you can set the cut visually without staring at an empty editor before a file exists.

Choose audio file

Start (seconds)

End (seconds)

Fade in (s)

Fade out (s)

—Source duration

—Selected duration

—Sample rate

—Estimated WAV size

Choose an audio fileBrowser-decodable input · 16-bit PCM WAV output · processed locally.

Fade audio Trim silence Make a loop Convert to WAV

Audio processing cluster

Verify the source before trusting the render

Decode locally, confirm sample rate, channels, duration and level evidence, then apply the transformation. Keep codec, browser decode and export-format limits explicit.

Start: Audio Editor Inspect a File

All 24 audio tools

Sample RateResample rate, Nyquist and output frames Stereo → MonoDownmix, correlation and cancellation risk Speed ChangerDuration, pitch and resampling behavior Loop MakerLoop boundaries, seam and repeated duration Frequency AnalyzerFFT resolution and spectral evidence Bass BoosterLow-shelf gain and clipping headroom Audio JoinerClip order, transitions and output duration Loudness AnalyzerLUFS planning, peak and dynamics

Upload first, then edit

Before a file is selected the editor stays compact. After the browser decodes the audio, the waveform becomes the main workspace and the start/end playhead shortcuts, fades, preview, and export controls become useful.

Output boundary

The cutter exports 16-bit PCM WAV so it does not pretend to preserve arbitrary source codecs. Browser decoder support and device memory determine which source files can be processed.

Render, review, then download

Cutting no longer has to trigger a download immediately. Render the selected range, listen to the WAV preview, and download only after the result is current.

Practical guide and verification

Use the product first, then apply these tool-specific checks to verify assumptions, interpret the result, and hand it off safely without moving the primary workflow below generic content.

Choose edit points by listening and by waveform context

A numeric start or end time can land in the middle of a word, drum transient, breath, or sustained tone. Preview around both boundaries and use small nudges before rendering. Short fades can reduce clicks at hard cuts, but a fade also changes the audio, so keep it minimal when preserving the original attack or release matters.

Keep the original file until the export is checked

Browser audio editing is convenient for local trimming, but the rendered file should be treated as a new derivative. Listen to the beginning, the cut points, and the end after export; confirm duration, channels, and perceived level; then keep the source until the new file has been verified in the player or editor where it will actually be used.

Codec labels do not guarantee identical encoded audio

A browser may decode an MP3 and render through a different internal format or encoder path depending on available APIs. Re-encoding lossy material can introduce additional artifacts. For archival or production mastering, use an editor that exposes codec, bitrate, sample-rate, metadata, and lossless intermediate choices rather than assuming every MP3 export is bit-for-bit equivalent.

Respect rights and privacy in the audio you edit

Local processing keeps the selected file in the browser workflow, but the content can still contain personal conversations, licensed music, or other protected material. Trim only audio you are allowed to use and review metadata or spoken information before sharing the result. Browser-local editing does not change the permissions attached to the source recording.