How to Use an Online Audio Studio: A Beginner’s Guide
Edit, clean up, convert and master audio for free in your browser. A friendly tour of every tool, with easy workflows for podcasts, videos, music and DJ sets.
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Free Audio Tools and Plain-Language Audio Guides
Free tools that run in your browser, and guides that explain recording, editing, mixing and mastering in plain language. Learn how sound works, then put it into practice on your own files.
Free · No sign-up · Your files never leave your device
Better Sound Starts With Understanding It
Why Recordings Go Wrong
Most audio problems come down to a handful of causes. A voice that sounds boomy has too much energy in the low frequencies, a track that sounds quiet on Spotify was mastered to the wrong loudness, and a podcast that tires the ear usually has harsh upper mids or sharp S sounds. Once you can name the cause, the fix is often one or two settings, not an expensive plug-in.
Learn and Practice in One Place
The guides explain these ideas in plain language, with the settings that matter and links to sources you can check. Each guide points to a tool where you can try the idea on your own file straight away, and most tool pages link back to the guide that goes with them. It is made for podcasters, musicians, DJs, video creators and anyone who wants better sound without studio software.
Start Here
Guides to the tools on this site and how to combine them.
How to Use the Sound Optimizer Tool
Reduce noise, make a voice clearer and raise quiet audio without clipping. A step-by-step guide with starting settings and loudness targets.
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How to Normalize Audio Without Clipping (LUFS Guide)
Make audio louder without distortion: peak vs. LUFS normalization, true peak limits and the right targets for Spotify, YouTube and podcasts.
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What Do You Want to Do?
Pick the job in front of you. Each box links the tool that does it and the guide that explains it.
Clean up a voice recording
Quiet the noise between phrases and soften harsh S sounds.
Make audio louder without distortion
Raise quiet recordings to a comfortable level and keep the peaks safe.
Convert WAV, MP3 or M4A
Turn WAV, MP3, M4A and AAC files into MP3 or WAV, several at once.
Cut, fade or join audio
Trim a recording, add a smooth fade and merge several files into one.
Get a track ready for Spotify
Measure LUFS and true peak and compare them with streaming targets.
Find the BPM and key of a song
Estimate tempo and key, then find compatible keys for a DJ set.
Fix a muddy or thin sound
Boost or cut bass, mids and treble to balance a voice or a mix.
Make slowed + reverb or 8D audio
Slow a track down with reverb, or make it circle around your head.
Edit and Clean Up Tools
Cut, join and fade files, fix the tone and level of a recording, and clean up voices.
Convert, Measure and Share Tools
Change formats and sample rates, check loudness before you publish, and turn audio into a video.
Music, DJ and Creative Tools
Change key and tempo, find BPM and key, create effects, play a synth and train your ears.
Guides by Topic
Each guide explains one topic and the settings that matter, and links the tool you can use to try it.
Recording & Voice
Cleaner recordings and clearer voices, from the room to the finished file.
- How to Remove Background Noise from AudioWhere hum, hiss and rumble come from, what a noise gate does, and how to clean up a voice recording step by step.
- How to Make Your Voice Sound ProfessionalMicrophone distance, EQ, de-essing and editing: the steps that make a spoken voice clear and pleasant to listen to.
- What Is Audio Clipping and How to Prevent ItWhat happens when a recording goes above 0 dBFS, how to set your levels, and how to avoid distortion while recording and mixing.
- What Is Phase Cancellation? (And How to Fix It)Why two microphones can make a recording sound thin and hollow, how to check for it and how to fix it.
- Audio Pitch Explained: How to Change Vocal ToneHow pitch and formants shape a voice, and how to change the pitch of a recording with or without changing its speed.
- Stereo vs. Mono Audio: What Is the Difference?How stereo and mono differ, when to record or export each one, and how to convert between them.
Mixing & Mastering
Balance, tone and loudness for podcasts, videos and music.
- How to Mix Vocals and Background MusicWhy music drowns out a voice, what audio ducking is, and the settings that keep speech clear in podcasts and videos.
- How to Master Audio for SpotifyHow Spotify’s loudness normalization works, what LUFS and true peak mean, and how to prepare a track for streaming.
- Audio Frequencies & 3-Band EQ GuideWhat bass, mid and treble really change, with a frequency chart and simple EQ settings for voice and music.
- How to Calculate Delay and Reverb TimesUse the 60,000 ÷ BPM formula to match delay and reverb times to the tempo of your song.
- Linear vs. Logarithmic Fades: Which Is Best?How the shape of a fade changes what you hear, and which curve to choose for fade-ins, fade-outs and crossfades.
Audio Basics
The ideas behind formats, sample rates and trained ears.
- WAV vs. FLAC vs. MP3: Lossless Audio FormatsThe difference between uncompressed, lossless and lossy audio, and which format to use for editing, podcasts and streaming.
- What Is Sample Rate? 44.1 kHz vs. 48 kHzWhat sample rate means, why music uses 44.1 kHz and video uses 48 kHz, and what to do when audio plays at the wrong speed.
- Audio Ear Training: How to Hear FrequenciesA practical routine for learning to recognize frequency ranges by ear, so EQ decisions become faster and more confident.
Creative, DJ & Music
Effects, synths, tempo, keys and DJ sets.
- How to Make Slowed + Reverb Songs Online (Free)The best speed, reverb and EQ settings for dreamy slowed edits, the story behind the sound, and how to share your versions without copyright trouble.
- How to Make 8D Audio OnlineWhat 8D audio really is, why it only works on headphones, and how to create the effect from your own tracks.
- Sine, Square, Sawtooth: Synthesizer Waveforms ExplainedHow the four basic waveforms differ in sound, and how synthesizers combine them into patches.
- How to Find the Key and BPM of a SongFind the tempo and musical key of any track, and use them to match songs for mixes and mashups.
- How to Pick Songs Like a DJHow DJs choose the next track: tempo, harmonic mixing with the Camelot wheel, and managing energy across a set.
- Hz to Note: How to Find the Pitch of a VoiceHow frequencies in hertz map to musical notes, with a chart of common vocal ranges.
How Free Audio Lab Works
1
Open your file
Choose an audio file or drag it onto the tool. It opens right in your browser.
2
Adjust and listen
Change the settings and preview the result. The guides suggest starting values for common jobs.
3
Download the result
Save the finished file, usually as WAV or MP3, and use it wherever you like.
The tools use the audio engine built into modern browsers, so they work without plug-ins or installation. The guides are written from hands-on experience in recording, production and DJing, explain why a setting works, and link to sources you can check.
About Free Audio Lab
I’m Yunus S., a musician and music producer, and I build the tools and write the guides on Free Audio Lab. More about me and the site.
Frequently Asked Questions
What is Free Audio Lab?
Free Audio Lab is a collection of free audio tools that run in your browser, together with plain-language guides to recording, editing, mixing and mastering. It is built and written by a musician and music producer.
Do I need to install software or create an account?
No. The tools work in a current browser on a computer, tablet or phone, without installation or sign-up. Your audio is processed on your own device.
Where should I start if I am new to audio editing?
Start with the guide How to Use an Online Audio Studio, which shows how the tools work together. When you know what you want to do, the tools page lists every tool by task.