Tool 14 · Audio looper · Free · No signup
Audio looper.
Drop an audio file, drag the handles to the part you want and choose how it repeats: a number of times, or until it fills a length. Crossfade the seams if they jump, listen, then download one MP3 or WAV. It all runs in your browser.
01 Audio
MP3, WAV, M4A, AAC, FLAC, OGG or Opus. The file is read on your device and never uploads.
02 The loop
03 Download
About 1 KB. 192 kbps is transparent for most music; 320 if it is going back into an editor. One file: audio-loop.mp3.
A loop, then a video
Loops end up in two places: short ones behind a track as a Spotify Canvas, long ones as an hour of study, sleep or practice audio on YouTube. Above, a loop in the Reel style of our waveform video maker. Drop the download on MP3 to MP4 for a still cover with the sound.
How to loop audio
Most online loopers repeat a whole file and stop there. This one loops any stretch you mark, to the millisecond, and works out each seam: a hard cut moved to the nearest zero crossing so it does not click, or an equal-power crossfade that keeps the level steady through the overlap. The result is written while it is encoded, so three hours of loop needs no more memory than the file you started with.
- Drop the file anywhere on the page, or click to choose it. Or try the sample beat, which comes with two bars already selected.
- Drag the two handles on the waveform to the part to loop, or type the start and end to the millisecond. Whole file resets it.
- Choose Repeat and a number of times, or Fill a length and the minutes.
- Press Play loop. If the seam jumps, move a handle to a beat, or raise the seam crossfade. Add a fade at the end for a long fill.
- Pick MP3 or WAV and press Loop and download. The file is named after yours, with -loop on the end.
Related
- Spotify Canvas makerA short loop as the vertical clip that plays behind a track.
- MP3 to MP4An hour of loop under one cover, ready for YouTube.
- BPM and key finderThe tempo, so you know how long one bar is.
- Audio joinerDifferent files one after another, with a gap or a crossfade.
- Audio trimmerKeep one part of a file, or cut a part out, to the millisecond.
- Audio speed changerThe loop slower for practice, in the same key, or faster.
- Music visualizerThe looped track as a video that moves with the beat.
- All guidesHow-tos and comparisons from the people who build the tools.
- Reverse audioReverse a phrase first, then loop it.
Questions
How do I make a loop that does not jump at the seam?+
Start and end the selection on the same beat of the bar, usually a downbeat, so the rhythm carries on across the seam. At 120 BPM one bar is 2 seconds (60 / BPM × 4), so a loop from 0:04.000 to 0:08.000 is exactly two bars; type the times in the Start and End fields to the millisecond. Our BPM finder gives the tempo of your file. For a pad, a drone or a field recording with no beat, use a crossfade of half a second to two seconds instead and the seam disappears.
Crossfade or hard cut?+
A hard cut keeps the loop the length you selected, which is what you want for a beat that has to stay in time with something else. The looper moves each cut to the nearest point where the wave crosses zero, within 10 ms, so it does not click; that can shift a copy by a few milliseconds, which you will not hear but a DAW grid will show. If it has to sit on a DAW grid to the sample, do the looping in the DAW. A crossfade overlaps the end of each copy with the start of the next on an equal-power curve; it hides a seam in ambient sound, but every copy is shorter by the crossfade, so a beat will drift against a click track.
How long can the looped file be?+
Repeat up to 500 times, or fill a length up to three hours. The loop is computed while it is encoded, so it never sits in memory whole; only the source file does. An MP3 at 128 kbps is about 58 MB an hour, at 192 kbps about 86 MB; an hour encoded in 39 seconds in Chrome on a laptop in our test, with the progress shown as it goes. A WAV is about 635 MB an hour, so for anything over a few minutes pick MP3 unless the file is going into an editor.
Can I loop just one part of a song, like the chorus?+
Yes. Drag the two handles on the waveform to the part you want, or type the start and end, and press Play loop to hear it go round. Hear the seam jumps to two seconds before the first join. Musicians use this to practise a passage, dancers to drill a section, and editors to stretch a music bed under a longer video.
Which formats can I open?+
Anything your browser can play: MP3, WAV, M4A and AAC, FLAC, OGG Vorbis and Opus in current Chrome, Edge and Firefox. Chrome cannot decode WMA, AIFF or Apple Lossless; convert those first. The download is an MP3 at 128, 192 or 320 kbps, or a 16-bit, 44.1 kHz WAV.
Is my audio uploaded?+
No. The file is decoded, looped and encoded on your device, and the download is made there. The page only counts that a loop was saved, with the format and the number of repeats, never a name or the audio.
Can I make the loop into a video?+
Yes. A loop of three to eight seconds is the shape of a Spotify Canvas, so the Canvas maker is the first button after the download: drop the same track there and it makes the silent vertical clip Spotify asks for, moving with the sound. For a longer loop, a study mix or a sleep sound, MP3 to MP4 puts it under a still cover for YouTube.