Change Audio Speed
Speed up or slow down an audio file, 0.5× to 2× — in your browser.
Seleccioneu un fitxer d'àudio
Speed up or slow down an audio file — 0.5× to 2×. Pitch changes with speed. Runs in your browser.
Fes clic per triar o deixa anar un fitxer aquí
Com Change Audio Speed
- 1
Add your audio
Drop in the file.
- 2
Set the speed
0.5× to 2×. "Keep pitch" is on by default; untick it for the pitch-shift (nightcore) effect.
- 3
Apply and download
Click Change speed and save the result.
Related PDF tools
Change Audio Speed — preguntes freqüents
Does the pitch change?+
Not by default. "Keep pitch" is on, which time-stretches the audio so a voice stays natural at any speed. Untick it to resample instead — then pitch moves with speed (the nightcore / slowed effect).
How far can I go?+
0.5× to 2×.
Is my file uploaded?+
No. It's processed entirely in your browser.
Why does "Keep pitch" sound slightly warbly?+
Time-stretching rearranges short overlapping grains of audio, which adds mild artefacts — usually fine on speech, more noticeable on busy music. Untick it for an artefact-free result with a pitch shift.
Pugeu els meus fitxers a un servidor?+
No: cada eina aquí processa els teus fitxers totalment al teu dispositiu, i no es puja res a un servidor. L'única excepció són les eines d'IA, que envien el text extret (no el fitxer) a Claude per fer la seva feina.
Hi ha un límit de mida de fitxer?+
No imposem cap límit artificial, però com que el processament passa al teu navegador, els fitxers molt grans (500+ MB o 1.000+ pàgines) estan limitats per la memòria del teu dispositiu, no per nosaltres.
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