Live-looping studio · In your browser
Spool — Free Online Music Looper & 8-Track Live Loop StationYour loop station lives in your browser.
Hit record, stack loops, add drums and keys — Spool turns your phone into a full live-looping rig. No install, no hardware. Free to try.
FREE STARTER · 1 LOOP TRACK · NO SIGNUP
Live looping dies the second you're hunting through menus mid-song. Spool's whole transport is three big buttons — and each one does exactly what a working looper's foot expects.
Record & overdub
One tap does the right thing. Empty track? It records. Got a take? It finishes it. Loop stopped? It plays and overdubs in a single tap. Already playing? You're layering. No modes to check, no state to remember — your foot already knows.
Play-only · Hands off your take
Green never touches your recording. It finishes an overdub and keeps playing, restarts a stopped loop in sync from the top — and if the loop's already playing, it politely does nothing. The safe button. The "just play it back" button.
Tap = end of loop · Double-tap = now
A single tap lets the loop finish its cycle, then stops — clean, musical, no guillotine. Need it dead right now? Double-tap. Two endings, one button, zero thought required on stage.
A proper count-in before the first take, so bar one lands where bar one belongs.
Arm it, and recording starts the instant you play — not the instant you fumble for a button. Silence before your first note gets trimmed, so the loop starts on the note.
Tap the tempo in, or let Spool follow your first loop. The grid locks to you — never the other way around.
A taste of the real engine, synthesized live in your browser. Hit the pads, start the groove, then drag on the filter pad while it plays. That's Spool in miniature.
Pads work with touch, mouse, or keys A S D F. Everything you hear is synthesized on the spot — no audio files, just like the full app's synth engine.
A loop that pops at the seam isn't a loop — it's a reminder. Spool's engine is built the way the hardware loopers do it: smooth the splice, kill the latency, and give the mix so much headroom it can't clip.
7ms
At every loop wrap, the tail fades out while the head fades in underneath it — an equal-power curve, so the seam is completely inaudible. Takes, overdubs, punch-ins, reversed and half-speed playback: no pops, ever.
0ms
Spool measures your device's real round-trip latency and shifts every take earlier by exactly that much. What you played lands where you played it — not a few milliseconds late and sluggish.
32-bit
Everything mixes in 32-bit float, with a safety limiter as the last stage before your speakers. Stack overdub on overdub on overdub — it saturates gracefully instead of crunching. What you export to WAV is what you heard.
No synthesized "drum-ish" noises, no one-note piano stretched across the keyboard. Spool ships with real recorded instruments — and any pad can wear any sound.
152
Kicks, snares, claps, snaps, hats, toms, crashes, rides, cowbell, shakers — 152 real studio recordings wired into the drum engine, organized into ten kits that genuinely sound different from each other. Edit mode lets you put any of the 152 on any pad.
C5
A multisampled Yamaha C5 grand — real notes across the full range, not one sample pitch-bent into submission. Plus the Vintage Upright: a characterful old piano with its quirks left in, because quirks are the good part.
12×2
Synth key patches for the electronic side, and a chord bank covering all 12 keys, major and minor — diatonic chords and 7ths played with an 18 ms strum, through the same keys engine. Pick a key, tap a chord, sound like you practiced.
Premium unlocks Spool's performance toolkit — the tools you reach for mid-song when the loop needs to go somewhere.
Save named snapshots of your whole setup and recall them with one tap — a real 500 ms crossfade between song sections, not a hard cut.
Hold it and the loop chops into beat-quantized repeats — 1/8, 1/16 or 1/32. Release lands back on the beat like nothing happened.
Every overdub wears your loop like analog tape: saturation, wow and flutter, a breath of hiss. Loops earn badges — Fresh, Worn, Vintage, Ancient. Fresh tape is one tap away.
Chop any recorded loop into 6 or 12 sample-accurate slices and play them as pads — reorder the take without re-recording it. MIDI-triggerable, velocity and all.
Twelve keys, major and minor, diatonic chords and 7ths with a natural strum — through the grand piano, the upright, or the synths.
One tap grabs the moment — audio plus a timestamped snapshot of your whole session, restorable later. Fifty ideas deep, so nothing good evaporates.
A real pitch tuner on your live input — note, Hz, cents needle — running YIN detection on the actual input stream.
Listens to your loop and names its key, then feeds it straight to the chord bank.
A beat light locked to the audio clock, with count-in — the whole room (or just you, out of the corner of your eye) stays on the grid.
Four assignable parameters from a 16-parameter registry, morphed bilinearly under one finger. Sweep the whole song's character in a single gesture.
Endings that breathe: fade the whole performance out over 2, 4 or 8 bars. Changed your mind mid-fade? Tap again — it comes back.
Half-speed, double-speed, octave shifts — the classic looper tricks, applied per track, in time.
Mistake in the last layer? Undo peels it off. Your loop underneath is never collateral damage.
On your phone, Spool is a focused Perform tab — big buttons, no clutter. Open it on a tablet or desktop and the whole studio unfolds.
65
Sixty-five customizable performance widgets — FX, instruments, macros, meters, utilities — arranged your way. Assign widgets to specific loops with the LoopAssign picker, and what shows up on stage is exactly the rig you built.
A real mixer with per-track control, and automation you can record and play back — rides you perform once happen every pass after.
Plug in a footswitch or controller and teach Spool your setup: MIDI learn on controls and automation, program changes included. Hands stay on the instrument.
One tap renders your loop to a WAV file — automation included, limiter and all, so the file sounds like the performance did.
Save and load full sessions, with autosave watching your back. Close the tab mid-song; your loops are where you left them.
No tiers, no upsell maze, no "Pro Plus Max." Start free, and when you outgrow one track, one payment unlocks everything — forever.
Starter
$0
FREE FOREVER
Premium
$29
ONE-TIME PAYMENT · NO SUBSCRIPTION
One payment. Yours to keep. No subscription.
New to live looping? A music looper records a short performance and repeats it seamlessly while you layer more parts on top — the one-person-band trick behind countless solo acts. Spool is that looper, online: no pedal, no app install, just your browser. The short version of everything else people ask before their first loop:
No download. No account. Open it, tap the red button, play something.
FREE STARTER · 1 LOOP TRACK · NO SIGNUP