FN Audio Lab

Free Online Audio Tools

Edit songs and audio, add music effects, and check loudness, BPM or musical key.

✓ Free to use✓ No account needed✓ Audio stays on your device

Music Effects

Change the feel

Slowed + Reverb

Make slowed and reverb songs online, free.

Sped Up / Nightcore

Speed up songs and audio online, free.

Bass Booster

Boost bass in your songs and audio.

Reverb Maker

Add reverb to songs and audio online.

Audio Utilities

Edit and understand

Audio Trimmer

Trim songs and audio to the part you need.

Volume & Loudness

Adjust volume or normalize audio loudness.

BPM Detector

Find the estimated tempo of your songs.

Key Finder

Find the estimated musical key of a song.

Your sound, in three steps01 Choose audio02 Adjust or analyze03 Listen or download

Browser-based tools. Longer tracks use more device memory. BPM and key results are estimates.

Something not working? Report an issue. Include the tool name and copied troubleshooting info from More options & details. Please do not email your audio unless requested.