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.
Length: 3:50Published:
What you'll learn
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
In this video
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.
Full transcript
Every word spoken in the video, so you can read it, search it or skim it.
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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New walkthroughs every week. Free tools, nothing uploaded.