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नि:शुल्क Audio Speed Changer

Speed up or slow down audio with the pitch preserved (great for podcasts) or shifted. Export as MP3. Runs entirely in your browser, no upload.

फाइल साइज सीमा छैनफाइलहरू निजी रहन्छन्लगइन आवश्यक छैनसधैँका लागि नि:शुल्क

यहाँ फाइलहरू छोड्नुहोस्, वा ब्राउज गर्न क्लिक गर्नुहोस्

MP3, WAV, FLAC, OGG, AAC, M4A, Audio फाइल साइज सीमा छैन

फाइलहरू ब्राउज गर्नुहोस्

तपाईंका फाइलहरू कहिल्यै तपाईंको यन्त्र छोड्दैनन्। सबै प्रशोधन तपाईंको ब्राउजरमा स्थानीय रूपमा हुन्छ।

Speed up or slow down audio — keep the natural pitch (great for podcasts and audiobooks) or shift the pitch. Runs entirely in your browser.

Optimize for your platform

Speed Up a Podcast Speed Up an Audiobook Make a Nightcore / Sped-Up Edit Make a Slowed + Reverb Edit Slow Down Audio for Transcription

यो कसरी काम गर्छ

Changing audio speed can either keep the pitch natural (so a sped-up voice doesn't sound like a chipmunk) or shift it (the classic record speed-up). This does both with FFmpeg in your browser.

1
FFmpeg.wasm loads once
The WebAssembly build downloads on first use and is cached afterwards.
2
You pick a speed and pitch mode
From 0.5× to 3×, with "keep natural pitch" on or off. The file stays in your browser.
3
FFmpeg re-times the audio
Natural-pitch mode uses chained atempo filters (time-stretch); pitch-shift mode uses asetrate (speeds and pitches together).
4
Download the MP3
The result is encoded to MP3 and previewed with the built-in player.