Speed up or slow down any song — pitch follows the speed, like a record. Runs on the TAIL engine, right here in your browser. Nothing leaves your device.
Drop in a track and move the speed slider — anywhere from 0.65x to 1.5x. The pitch follows the speed, the way a record sounds played faster or slower, and you hear the result instantly. When it's right, export: free, no watermark, no account. Everything runs locally in your browser on the same audio engine as the TAIL sampler — your audio is never uploaded.
This is a genuine resample, not a time-stretch: speed and pitch move together, which is exactly how the sped-up and slowed versions you hear everywhere are made. Faster means brighter and higher; slower means deeper and heavier. That linked movement is the sound people are after — a time-stretch that holds the pitch steady sounds processed by comparison.
1.15x–1.25x is the "sped up" sound all over TikTok. 0.8x is the classic slowed feel — and if you want the full slowed-with-atmosphere aesthetic, the Slowed and Reverb Generator has the reverb wired in. Push past 1.25x and you're in nightcore territory, which has its own page and preset too.
The edit is only half the fun. Open TAIL's browser sampler, load your export onto a pad, slice it, and build a beat around it — same engine, same tab, nothing to install.
Ready to go further? Open the TAIL sampler and build a beat from your edit — or try the Slowed and Reverb Generator and the Nightcore Maker.
Drop the audio file on this page, drag the speed slider above 1x, and press Preview. When it sounds right, click Export — the edit downloads immediately. Everything runs in your browser; nothing is uploaded.
Same tool, other direction: drag the speed slider below 1x. Around 0.8x you get the classic slowed sound, with the pitch dropping alongside — like a record played slow. Add atmosphere with the reverb slider, or use the Slowed and Reverb Generator page with the preset already dialed in.
Not here — that's time-stretching, a different effect. This tool links speed and pitch on purpose, because that's how the sped-up and slowed edits people share are actually made. If you need tempo-only changes for practice or transcription, a time-stretching tool is the right pick.
Yes, it's free, and no — there is no watermark, no sign-up, and no export limit. The processing runs on your own device, so there are no server costs behind it.
Most sped-up edits sit between 1.15x and 1.25x — fast enough to lift the energy, not so fast it tips into nightcore. Above 1.25x, with the pitch rising sharply, you're making nightcore — the Nightcore Maker page has that preset ready.
An edit of someone else's recording is a derivative work, so posting it generally requires the rights holder's permission. TikTok and YouTube handle much of this through licensing deals and Content ID, which may claim or monetize the upload. Your own music and royalty-free tracks are always fine.