Browser studio / Web Audio & Chrome Extension
Any song,
slowed and reverbed.
Real-time speed, convolution reverb, bass boost and volume for any track. Drop an audio or video file below to mix and export instantly in your browser.
01 / Track
Drop an audio or video file here
MP3, WAV, OGG, M4A, FLAC, MP4 or MOV. Video files are used for their audio.
02 / Effects
Off, speed moves in 0.05 jumps (0.80, 0.85, 0.90). On, it moves one hundredth at a time (0.90, 0.91, 0.92).
Keep vocals at their original pitch while the track slows down.
- Processing
- 100% local
- Data collected
- None
- Effects
- Real-time
- Languages
- 5
Chrome extension
Want this on YouTube and Spotify?
The extension applies the same effects in real time to any tab playing audio or video, with no files needed.
Controls
Studio controls, not a playback-rate hack
Speed
0.50x to 1.50x
Playback rate, stepped in 0.01
Reverb
0 to 100%
Convolution wet mix, 5 s decay tail
Volume
0 to 400%
Master gain with a limiter after it
- Pro
Bass boost
0 to +10 dB
Low-shelf filter at 160 Hz
- Pro
Pitch correction
On / off
Preserve pitch while slowing
Custom presets
Unlimited
Saved locally on your device
How it works
Four steps, zero learning curve
- 01
Open your audio
Any site playing audio or video, YouTube included.
- 02
Click the icon
The control panel opens on top of the page.
- 03
Pick a preset
Slowed + reverb, nightcore, daycore or your own.
- 04
Hear it instantly
Effects apply live, with no rendering step.
Privacy
Your listening stays yours
Audio never leaves your device. There is no account and no server, and the extension declares zero data collection on the Chrome Web Store.
Read the privacy policy100% local processing
Every effect runs through the Web Audio API inside your browser.
No ads, no trackers
No analytics scripts and no external network requests.
Zero data collected
No personal data, browsing history or audio ever leaves your device.
FAQ