Find the loop in a song
Drop a song and the best places to loop it are found and ranked, in whole bars when the tempo is clear. Audition the real wrap, nudge the edges, then export a WAV that loops cleanly, or one that carries its loop points for samplers.
Free · no account · runs in your browser — nothing is uploaded; your audio never leaves your device.
Best loops found
Drag the loop. ←→ nudge the end (edges snap to zero crossings), Alt for the start. Aim for whole bars: at your BPM, one bar = 240 ÷ BPM seconds.
The link holds only the start and end times. Open it, drop the same song, and the loop is already set. Your audio is never part of it.
Your ears place this loop. The studio's engine places it on the bar.
A seam your ears approve is good; a loop that's exactly four bars at the song's real tempo is better. SongRepeat in the studio cuts beat-locked loops from the actual grid. Sign up: 3 full packs free.
The embedded-loop-points superpower
Most loop tools hand you a file and wish you luck setting the points again in your
sampler. The smpl chunk fixes that: it's a forty-year-old corner of the WAV
spec that carries "loop from sample X to sample Y" inside the file itself. Kontakt, TAL,
DecentSampler, MPCs, and most hardware read it on import — your loop arrives already
looping. Almost nothing free writes it; this tool does.
How to find the loop in a song
- Load the songDrop the track on the finder. It stays on your device.
- Pick a found loopThe best loops are listed and ranked, in whole bars when the tempo is clear. Press Audition on one to hear it wrap.
- Adjust if you need toDrag the region on the waveform, or nudge the edges with the arrow keys, and raise the seam crossfade until the join disappears.
- Export or shareExport the loop WAV, the full WAV with embedded loop points for samplers, or copy a link that reopens this exact loop on the same song.
Frequently asked questions
How do I find the loop in a song?
Drop the song on the finder. It compares the audio just before each possible loop end with the audio just before the start, and the audio after, then ranks the places where the end flows back into the start. When the tempo is clear the lengths are whole bars (1, 2, 4, 8 or 16). Audition any result, nudge it, and export.
Does the finder change my audio or its length?
No. A found loop keeps its exact start and end samples, and the default export is the raw slice, untouched. The seam crossfade is off by default; if you raise the slider it blends the loop's tail into its start, still without shortening or lengthening the loop.
How do I make a loop sound seamless?
Three things kill seams: clicks (fixed by zero-cross snapping, automatic here), level jumps (fixed by the crossfade slider, which melts the end into the start), and musical mismatch — the loop needs to end where the groove expects to restart. Nudge the edges with the arrow keys while the gapless preview runs until it disappears.
What are embedded loop points (the smpl chunk)?
WAV files can carry sampler metadata that says 'loop from here to here'. Hardware samplers, Kontakt, TAL, and most serious soft-samplers read it and loop natively — no manual point-setting. This tool writes that chunk into your export, which almost no free tool does.
Why does my loop click even at a zero crossing?
A zero crossing fixes the level discontinuity but not the slope — the waveform can still bend sharply at the seam. That's what the crossfade is for: even 10–20 ms of equal-power blend erases the bend.
What loop lengths work best?
Musical power-of-two lengths — 1, 2, 4, or 8 bars — loop most convincingly. If you know the BPM, bar length in seconds is 240 ÷ BPM; the readout shows your selection's length so you can aim.