Speed Up or Slow Down Audio Without Chipmunk Voice — Every Setting (Free, No Upload)
Every setting of the free Audio Speed Changer: 1.0× is a lossless copy; the Podcast preset plays 30.7 seconds of speech in 20.5 with the pitch held; the speed can be a multiplier, a percentage or a target length (0:20 in, a 20.0-second file out); Hold original vs Follow speed for the pitch (the Slowed preset, 0.85×, 23.6 s); and the live preview with an A-B loop. Then three jobs you can hear: a podcast at 1.5×, music at 0.7× to practise, a clip fitted to a slot. Nothing is uploaded.
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1.0× is a lossless copy
Podcast 1.5×: 30.7 s → 20.5 s, pitch held
Multiplier, percent or target length
Hold original vs Follow speed
Live preview with an A-B loop
Three jobs you can hear
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Every setting of the free Audio Speed Changer: 1.0× is a lossless copy; the Podcast preset plays 30.7 seconds of speech in 20.5 with the pitch held; the speed can be a multiplier, a percentage or a target length (0:20 in, a 20.0-second file out); Hold original vs Follow speed for the pitch (the Slowed preset, 0.85×, 23.6 s); and the live preview with an A-B loop. Then three jobs you can hear: a podcast at 1.5×, music at 0.7× to practise, a clip fitted to a slot. Nothing is uploaded.
The Audio Speed Changer, every setting. At 1.0× nothing is re-encoded — the tool says "Lossless copy". The Podcast preset plays a 30.7-second voice note in 20.5 seconds with the pitch held, so the voice still sounds like the same person; Skim goes to 2×. The speed can be typed as a multiplier, a percentage, or a target length — ask for 0:20 and the file is 20.0 seconds. Pitch is the choice that changes the sound: Hold original keeps voices natural at any speed, Follow speed moves the pitch like a record played fast or slow (the Slowed preset: 0.85×, 23.6 seconds). A live preview plays the result before you export; drag across the waveform to loop a passage. Free processes one file up to 50 MB with results up to 30 minutes. Nothing is uploaded.
Transkrip lengkap
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30.7 s at normal speed
The audio speed changer, every setting: the presets, three ways to set the speed, holding the pitch or letting it follow, and a live preview — and which to use for what. Free, and nothing is uploaded.
Presets at the top. Then the speed — as a multiplier, a percentage, or a target length — the pitch, and the output. The waveform above plays live as you change it.
1.0× · lossless copy
Podcast 1.5× · 30.7 s → 20.5 s
Multiplier · Percent · Target length
Target length 0:20 → 20.0 s
Pitch is the choice that changes the sound. Hold original keeps a voice sounding like itself at any speed. Follow speed lets the pitch move with it, like a record played fast or slow.
Slowed 0.85× · pitch follows · 23.6 s
And before you export, the preview plays it live. Drag across the waveform to loop one passage, and zoom in on it.
Lecture or podcast · 1.5× · pitch held
Practise music · 0.7× · 28.6 s
Fit a slot · Target length
So: speech, speed up with the pitch held. Practice, slow down with the pitch held. An effect, let the pitch follow. A fixed slot, target length.
Free: one file · 50 MB · results up to 30 min
None of it left the browser. This is its own record of everything it fetched while all of that ran — not one request carried the recording.
Free, no account, nothing uploaded. Bring your own recording — and I will see you in the next one.
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