Audio tools — free online tool

Convert audio to MP3, M4A or WAV, trim and mix tracks on a waveform timeline, adjust volume and fades, or extract audio from a video file.

Audio converterChoose an audio file to convert it to MP3, M4A, or WAV.Convert audio to MP3Convert audio to M4AOpen tool Audio editorOpen an audio file to trim, mix, and adjust it on a waveform timeline.Edit audio onlineTrim audioOpen tool Audio speed changerChoose an audio file and a speed to speed it up or slow it down.Speed up audioSlow down audioOpen tool Audio trimmerDrag the start and end points on the waveform to trim an audio file.Trim audioTrim MP3 audioOpen tool Audio effectsChoose an audio file to adjust volume, fade, or equalizer settings.Change audio volumeFade audio in and outOpen tool Extract audio from videoChoose a video file to extract its audio as MP3, M4A, or WAV.Video to MP3 converterVideo to M4A converterOpen tool

The audio section holds six tools that all work on the file inside your browser: Audio converter, Audio editor, Audio speed changer, Audio trimmer, Audio effects and Extract audio from video. They share one engine and one set of export choices, so the real decision is which job you start from.

Pick the converter when the format is the problem: a WAV too large to email, an OGG or FLAC file that a device refuses to play, or a recording you need as M4A for a phone. Pick Extract audio from video when the source is an MP4, M4V, MOV or WebM clip and you only want its soundtrack as MP3, M4A or WAV.

The editor is the busiest tool. Its tabs cover Trim, Speed, Volume, Fade, EQ and Mix, and the Mix tab lays up to seven extra tracks over a source file, each with a delay of 0 to 600 seconds and a gain of 0 to 200 percent. The trimmer, the speed changer and the effects tools open the same machinery focused on one task, so the right control is already in front of you.

Results leave as MP3 or M4A (AAC) at 96, 128, 192, 256 or 320 kbps, with 192 as the default, or as 16-bit WAV, which has no bitrate setting. Sample rate (22.05, 32, 44.1 or 48 kHz) and mono or stereo can also be changed, and every result gets its own preview player and download button.

One run applies one operation. To cut a clip and then fade it, export the cut, load that file again and apply the fade. Start from the original recording whenever you can, because each lossy export adds a little more loss.

What should I listen for in the exported audio?

Play the beginning, end, and each edited transition in the downloaded file. Check that speech is not cut off, fades sound natural, and louder sections do not distort. Converting a compressed recording to WAV does not restore information already lost. Keep the source and choose an output format accepted by the destination service.