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About Speed/Pitch Adjuster
The Speed/Pitch Adjuster changes how fast an audio file plays and shifts its pitch independently, so speech slows down or speeds up without the usual draggy or chipmunk voice effects. Transcribers, language learners, musicians, and podcast editors use it to make speech easier to follow or to match a backing track to a singer's range. Load a file, set playback speed between 0.5x and 2x, adjust pitch in semitones or pick a preset effect, then preview the result before downloading the processed audio. All processing runs locally in your browser with the Web Audio API, and your file is never uploaded, so interviews, practice takes, and private recordings stay on your device.
Key Features
- ✓Adjust playback speed from 0.5x to 2x
- ✓Shift pitch independently in semitones
- ✓Quick presets for common speed and pitch combinations
- ✓Voice and creative effect presets
- ✓Real-time preview with before/after comparison
- ✓Downloads the processed audio to your device
How to Use Speed/Pitch Adjuster
- 1
Upload Your Audio File
Click Choose Audio File and select the recording you want to modify. Duration and file size are shown once it loads.
- 2
Pick a Preset or Set Values
Use the Quick Presets, Voice Effects, or Creative Effects buttons for one-click settings, or move the Speed and Pitch sliders manually.
- 3
Fine-Tune Speed and Pitch
Set playback speed anywhere from 0.5x to 2x and shift pitch in semitones independently of the speed.
- 4
Preview the Changes
Use the built-in preview to compare the original and processed audio before committing to your settings.
- 5
Download the Result
Process the file, then download the adjusted audio from the Processed Audio section to your device.
Read the complete step-by-step guide with screenshots and pro tips
Common Use Cases
- •A transcriptionist slows an interview recording to 0.75x to catch every word accurately.
- •A language learner reduces playback speed to practice listening without changing the speaker's voice.
- •A musician shifts a backing track by a few semitones to match their vocal range.
- •A podcast editor speeds up a long episode to 1.5x for a quick review pass.
- •A content creator applies a voice effect preset for a character voice in a short skit.
Frequently Asked Questions
Is my audio uploaded to a server for processing?
No. All speed and pitch processing runs in your browser using the Web Audio API. Your file never leaves your device and the result downloads locally.
What speed and pitch ranges are supported?
Playback speed can be set from 0.5x to 2x. Pitch can be shifted independently in semitones, so you can change one without affecting the other.
Does this tool cost anything or require signup?
No. It is completely free to use with no account, no subscription, and no watermarks on your output.