Audio Trimmer

The Audio Trimmer supports MP3, WAV, OGG, M4A, FLAC, and AAC files. Any audio format that your browser can natively decode will work. For output, you can choose WAV (lossless), MP3 at 128–320 kbps, or M4R (iPhone ringtone format). Chrome, Edge, and Firefox support the widest range of input formats.

There is no hard file size limit since all processing happens in your browser. However, very large files (over 500 MB) may cause performance issues depending on your device's available memory. For most audio files — songs, voice recordings, podcast episodes — the tool handles them without any problems. If you experience slowness with a very long recording, try splitting it into smaller chunks first.

When you export as WAV, trimming is completely lossless — the audio quality is identical to the original. The tool simply extracts the selected samples without any re-encoding. If you export as MP3, some quality loss occurs due to compression, but this is generally imperceptible at standard bitrates, especially 192 kbps and up. For maximum quality preservation, always choose WAV output.

Yes, in two ways. Use Remove-selection mode to cut a section out of the middle in a single pass — everything before and after your selection is stitched back together automatically. To keep several separate segments, trim and download one at a time: adjust the selection points and trim again for each segment. Each trim operation creates its own output file.

Yes — trimming, fades, volume, normalization, and both WAV and MP3 export all happen entirely in your browser using the Web Audio API. Your original file is never uploaded. The only exception is the optional M4R ringtone export for iPhone, which sends just the trimmed (already-cut) audio to our server for conversion; everything else about your file stays on your device.

The trimmer offers sample-accurate precision. You can set start and end points down to the millisecond using the time input fields (format: M:SS.mmm), drag the dedicated start/end handles, or nudge with the arrow keys. Zoom in up to 128× on the waveform for pixel-level accuracy on long tracks. For critical cuts, combine zoom with the time inputs for exact control.

Yes. Use the green play button (or press Space) to hear exactly what will be exported — including any fades — before trimming. In Remove-selection mode, the preview plays a few seconds before and after the cut so you can hear the splice. You can adjust the selection and preview as many times as needed. After trimming, the result also includes a built-in audio player for final verification before downloading.

Yes. Choose a fade-in length (0.5, 1, 2, or 3 seconds) and a fade-out length independently from the dropdowns above the export buttons — either can be left off. Fades are applied as a linear ramp after your selection is extracted, so you hear the exact result in the selection preview before exporting. They work well for smoothing cuts that land mid-note or mid-word, and the ringtone presets apply a 2-second fade-out automatically.

Yes, the Audio Trimmer works on mobile browsers including Chrome and Safari on both iOS and Android. The waveform editor uses Pointer Events, so you can tap and drag the selection handles, pinch to zoom, and swipe to pan when zoomed in. For the best experience on mobile, use landscape orientation when working with longer audio files so you have more waveform detail visible.

Yes — use the one-click ringtone presets. "iPhone (M4R · 30s)" grabs a 30-second segment starting where your selection is, adds a 2-second fade-out, and exports directly to the .m4r format iOS expects (converted on our server; everything else stays on-device). "Android (MP3 · 30s)" does the same but exports a 30-second MP3. Both presets are just a starting point — you can still adjust the selection, fades, and length before exporting.

Load your podcast recording, then use the waveform to identify and select the segment you want to keep. Zoom in on the waveform to spot silent gaps, intro music, or off-topic sections precisely, and drag the selection handles for sample-accurate cuts. For clean edits, trim at natural pauses in speech. If you need to remove a section from the middle instead, switch to Remove-selection mode — it cuts out exactly what you've selected and stitches the rest back together in one export, no separate joining tool required.

Switch the mode toggle to "Remove selection," then drag on the waveform (or use the Start/End time fields) to select exactly the part you want gone — an unwanted verse, an ad break, a mistake in a recording. When you export, the tool keeps everything before your selection and everything after it, seamlessly joined into a single output file. The duration display updates live to show the resulting length, and the selection preview lets you hear the splice (a few seconds before the cut and a few seconds after) before you commit.

Yes, this is one of the most common uses. Load your audio and look at the waveform — silent sections appear as flat lines near the center. Set your start point just before the audio begins and your end point just after it ends to trim away leading and trailing silence. Zoom in on the start and end of the track to place these points precisely. This is especially useful for cleaning up voice recordings, where recorders often capture a few seconds of silence at the start and end.

Yes. Regardless of the input format, you can export the trimmed result as WAV (lossless), MP3 at 128, 192, or 320 kbps, or M4R (for iPhone ringtones, converted on our server). For example, you can load an OGG file and export the trimmed result as WAV, or load a FLAC file and export as a 320 kbps MP3. This makes the trimmer double as a basic format converter for the trimmed segment.

The Audio Trimmer works in all modern browsers that support the Web Audio API and Pointer Events. This includes Chrome, Firefox, Edge, Safari, Opera, and Brave on both desktop and mobile. For the best experience and widest format support, we recommend using the latest version of Chrome or Edge. Internet Explorer is not supported.

Yes. Every committed selection change — dragging a handle, editing a time field, applying a preset, switching Keep/Remove mode — is pushed onto an undo stack (up to 50 steps). Press Ctrl/Cmd+Z to undo and Ctrl+Y (or Ctrl+Shift+Z) to redo. Your original file is never modified — it's a non-destructive workflow, so you can experiment freely and step back whenever you want.

Yes, the tool can handle long recordings such as full podcast episodes, lecture recordings, or multi-hour audio files. The waveform display scales to show the entire track regardless of length, and you can zoom in for detail on any section without losing overview — the minimap strip below the waveform always shows where you are in the full track. For very long files (over an hour), loading and waveform generation may take a few extra seconds depending on your device. Once loaded, trimming and playback work normally.

The waveform is generated by analyzing your audio data and displaying the amplitude (volume level) over time. Louder sections appear as taller bars, while quiet sections appear shorter. The selected region is highlighted in bright cyan in Keep mode (or dimmed red in Remove mode), while the rest of the track is shown at reduced opacity. Zooming in redraws the waveform for just the visible window, so detail stays sharp even on hour-long files. This visual representation helps you identify specific sounds, words, musical sections, and silence without having to listen through the entire track.

Yes. Space plays or pauses the selection preview. Arrow Left/Right nudge the start point (hold Shift for 1-second steps); Alt+Arrow Left/Right nudge the end point the same way. Plus (+) and Minus (-) zoom in and out on the waveform, and 0 resets to fit the whole track. Ctrl/Cmd+Z undoes your last selection change and Ctrl+Y (or Ctrl+Shift+Z) redoes it. Shortcuts are ignored while a text input is focused, so typing exact times in the Start/End fields never triggers them by accident.

The tool processes one file at a time to keep the interface simple and focused. For batch trimming, you would process each file individually — load, set your trim points, export, then load the next file. If you need to apply the same trim (for example, removing the first 5 seconds from many files), note down your start and end times and apply them consistently to each file.

Once the page has fully loaded in your browser, the core trimming functionality — waveform display, zoom, selection, fades, volume, normalization, undo, and WAV/MP3 export — works without an internet connection. All of that uses the Web Audio API built into your browser. Only the optional M4R ringtone export needs connectivity, since it uses our server to convert to Apple's format.