Speed up MP3 & audio
Make podcasts, audiobooks, lectures, and voice memos permanently faster — natural pitch, plays anywhere.
Free · No signup · Files never leave your device
Drag and drop a video or audio file
or click to browse
Other speeds
How it works
Drop your file
It stays on your device — nothing is uploaded.
Processed locally
The speed is changed right in your browser via WebAssembly — audio pitch stays natural.
Download the result
Preview the new speed and download for free — no watermark.
Listen faster, retain the same
Research on accelerated speech consistently finds comprehension holds up well to around 1.5×–2× for material in your native language — which is why 1.5× is the default here. Sped-up copies are perfect for lecture recordings before an exam, voice memos from meetings, and podcast backlogs you will honestly never clear at 1×.
The processing is the same time-stretching your podcast app does, but baked into the file: pitch stays natural, silences shrink proportionally, and the result plays at speed on every device — including the ones with no speed button.
Frequently asked questions
No. The audio is time-stretched, not resampled — speech changes tempo but keeps its natural pitch, the same technique podcast apps use for their speed buttons.
Not every player has a speed control — car stereos, simple MP3 players, message voice notes, most web embeds. A sped-up file works everywhere, and for a lecture archive it also cuts the storage size of your listening backlog by a third at 1.5×.
Fast — there is no video to re-encode, so even an hour-long recording processes in well under real time, entirely in your browser.
MP3, WAV, M4A, AAC, FLAC, OGG and most other common formats. MP3 and WAV keep their format; others are saved as M4A.
Yes. The speed changer is completely free, with no signup, watermarks, or limits. We make money from our video translation service, not from this tool.
No. The speed change happens locally in your browser using WebAssembly. Your file never leaves your device — you can even disconnect from the internet once the page has loaded.