Free Online Audio Tools: Edit, Convert and Enhance Audio
Every tool on this page does one job well and runs in your browser on a computer, tablet or phone. Below you can see what each tool opens and saves, compare them side by side, and follow step-by-step workflows for podcasts, music, DJ sets and social clips.
Edit and Enhance
Tools for the everyday work on a recording: cutting it to length, joining files, fading in and out, fixing tone and level, and cleaning up voices. Most of them save a WAV file, so you can keep editing without losing quality.
Related guides: How to Remove Background Noise from Audio · How to Make Your Voice Sound Professional · What Is Audio Clipping and How to Prevent It
Convert, Measure and Share
Tools for the last steps before you publish: changing the format or sample rate, checking loudness against streaming targets, and turning audio into a video for social media.
Related guides: WAV vs. FLAC vs. MP3: Lossless Audio Formats · What Is Sample Rate? 44.1 kHz vs. 48 kHz · How to Master Audio for Spotify
Music, DJ and Creative
Tools for musicians, producers and DJs: change key and tempo, find BPM and key, plan harmonic mixes, create slowed + reverb and 8D versions, play a synthesizer and train your ears.
Related guides: How to Find the Key and BPM of a Song · How to Pick Songs Like a DJ · Audio Pitch Explained: How to Change Vocal Tone
Which Tool Do I Need?
All tools at a glance, with what each one does. The cards above show what each tool opens and saves.
| Tool | What it does |
|---|---|
| Audio Trimmer | Keep a section or cut a part out of the middle |
| Audio Joiner & Mixer | Merge several files, with optional DJ transitions |
| Audio Fade Tool | Add a fade-in and fade-out with a chosen curve |
| Sound Optimizer | Clearer voice and comfortable loudness in one step |
| Noise Gate & De-Esser | Quiet noise between phrases and soften S sounds |
| 3-Band EQ | Boost or cut bass, mids and treble |
| Auto-Ducker | Lower background music while someone speaks |
| Stereo to Mono Converter | Mix to mono or keep one channel |
| Phase Inverter | Flip polarity and check mono compatibility |
| Audio Converter | Convert files to MP3 or WAV, several at once |
| Sample Rate Converter | Change the sample rate, e.g. 44.1 to 48 kHz |
| LUFS & Peak Analyzer | Measure integrated LUFS and true peak |
| Tool | What it does |
|---|---|
| Audiogram Maker | Turn audio into a video with a moving waveform |
| Pitch & Speed Changer | Change key and tempo separately or together |
| Slowed + Reverb Maker | Slow a song down and add reverb |
| 8D Audio Maker | Make sound circle around the listener |
| BPM & Key Analyzer | Estimate tempo and musical key |
| BPM Tapper | Find a tempo by tapping along |
| Camelot Wheel | Find keys that mix well together |
| Metronome | Keep time while you practice |
| Delay/Reverb Calculator | Delay and reverb times from the song tempo |
| Frequency to Note Converter | Convert between Hz and musical notes |
| Web Synthesizer | Play a synthesizer and record what you play |
| Ear Training | Learn to hear EQ frequency bands |
Common Workflows
Many jobs take more than one tool. These are the usual orders, each step linked to the tool that does it.
Podcast episode
Cut the mistakes, quiet the background, set a comfortable level, check it against -16 LUFS and export an MP3 for your host.
Guide: Voice recording guide
Music release
Balance the tone, check loudness and true peak against streaming targets, and keep a WAV master next to your MP3.
Guide: Spotify mastering guide
DJ set preparation
Find tempo and key, pick compatible tracks, adjust key or tempo where needed and test the transitions.
Guide: Song selection guide
Social media clip
Cut the best moment, make it clear and loud enough for phone speakers, then turn it into a video.
Guide: Voice and music guide
Before You Start
- Browsers: The tools work in current versions of Chrome, Edge, Safari and Firefox on desktop and mobile. A few features depend on the browser: the Audiogram Maker saves MP4 in Chrome, Edge and Safari and WebM in Firefox.
- File formats: Most tools open MP3, WAV, M4A, AAC and FLAC files. OGG works in most browsers but not in every version of Safari.
- What you get back: Editing tools save WAV files, so repeated edits do not add compression artifacts. The Audio Converter turns any result into an MP3 for sharing.
- Sample rate and channels: Files keep their channels. Some tools save at your device’s audio sample rate, usually 44.1 or 48 kHz; the Sample Rate Converter gives you full control over it.
- Long files and phones: Processing happens on your device, so very long files need a lot of memory. If a long file fails on a phone, try it on a computer or split it with the Audio Trimmer first.
Learn Before You Edit
The guides explain the ideas behind the tools and suggest settings to start from.