Audio speed changer
Play a track faster or slower without turning vocals into chipmunks — tempo changes, pitch stays put.
Loading tool…
An audio speed changer re-times a track without moving its pitch, so a 1.5× version plays faster while voices and instruments keep the exact tones they started with. That is what separates it from simply changing playback rate: spinning a record faster drags the pitch up along with the tempo, whereas time-stretching keeps the singer sounding like the same singer at a new speed. It works by slicing the audio into short overlapping segments and re-spacing them, which is how a 120 BPM export can become 140 BPM without anyone sounding like they inhaled helium.
Creators reach for this when the words are right but the pace is not — a Suno verse that drags, a hook that would hit harder a touch faster, or a demo you want to slow right down to learn. Everything runs locally in your browser, so an unreleased track never uploads and you can audition several speeds from 0.5× up to 2× back to back before committing to one. The re-timed file comes back in the same format you dropped in, so a WAV stays a WAV and an MP3 stays an MP3, and it slots straight into the rest of your edit.
How it works
- 1
Drop your audio file.
- 2
Set the speed between 0.5× and 2×.
- 3
Click apply and download the re-timed file.
When to use it
- Slowing a fast, dense Suno rap to 0.75× to catch every word for a lyric video or to learn the melody, with the key left untouched.
- Speeding a spoken-intro or storytelling export to 1.2× so it fits the tight runtime of a TikTok or Instagram Reel without the narrator turning chipmunky.
- Nudging a generated instrumental from 120 BPM up to 128 to beat-match it against a DJ set or a video edit while it stays in exactly the same key.
FAQ
Does the pitch change?
No — this tool uses time-stretching, so a 1.5× version plays faster at the original pitch. If you want the pitch to rise with speed (the nightcore sound), use the nightcore maker instead.
Is there a quality cost?
Extreme stretches (below 0.6× or above 1.8×) can add slight artifacts; moderate changes are essentially transparent.
Does changing the speed also change the length of the file?
Yes — duration scales inversely with speed, so a three-minute track becomes about 90 seconds at 2× and stretches to roughly six minutes at 0.5×. Only the running time and tempo move; the pitch and key stay exactly where they were.
Can I speed up just one part of a song?
No — the speed applies to the whole file in a single pass. To re-time only a section, cut it out first with the MP3 cutter, change its speed here, then stitch it back together with the gapless join tool.
What formats can I load, and what do I get back?
You can drop MP3, WAV, FLAC, M4A, OGG, or AAC. WAV and FLAC come back in their own format, so lossless sources stay lossless, and an MP3 stays an MP3. The other lossy inputs — M4A, OGG, and AAC — are re-encoded on the way out and handed back as a high-quality MP3 rather than their original container.
Related tools
Nightcore maker
Turn any song into a nightcore version — faster and higher-pitched together, the classic sound. Free, in your browser.
Pitch shifter
Shift audio up or down by up to 12 semitones while keeping the tempo. Free browser tool, no upload.
Slowed and reverb maker
Slow a track down and drench it in reverb — the slowed + reverb aesthetic, rendered in your browser for free.