Audio Tools
Cut, merge, boost, convert and analyze audio files with studio-grade tools that run entirely in your browser.
Audio editing usually means installing a full workstation just to trim a clip. These tools cover the everyday jobs directly in the browser using the Web Audio API, which is the same sample-accurate engine that powers browser synths and DAWs.
You can already cut audio visually with fades, record from your microphone, generate precise test tones, and practise with an accurate metronome. Conversion, compression, effects and analysis tools are on the way.
Edit
11 toolsAudio Cutter
Trim audio with a visual waveform.
Audio Merger
Join multiple audio files.
Fade / Crossfade
Add fades and crossfades.
Volume Booster
Make quiet audio louder.
Normalizer
Normalize peak or LUFS loudness.
Pitch Shifter
Change pitch without changing speed.
Speed Changer
Change playback speed.
Audio Reverser
Play audio backwards.
Silence Remover
Cut dead air automatically.
Multi-track Mixer
Mix tracks with volume and pan.
Ringtone Maker
Create ringtones for iPhone and Android.
Effects
6 toolsConvert
4 toolsAnalyze & Tools
10 toolsVoice Recorder
Record your voice with a live waveform.
Spectrogram
Visualize frequencies over time.
BPM Detector
Find the tempo of any song.
Key Detector
Detect the musical key.
Loudness Meter
Measure LUFS and true peak.
Online Tuner
Chromatic tuner using your mic.
Metronome
Accurate metronome with accents.
Tone Generator
Sine, square, saw and triangle tones.
Visualizer Video Maker
Waveform videos for podcasts.
Waveform Player
Play audio with a waveform view.
Guide
Lossy vs lossless audio
Lossless formats such as WAV and FLAC keep every sample. A minute of CD-quality stereo WAV (44.1 kHz, 16-bit) is about 10 MB, and FLAC typically stores the same audio in 50–70% of that. Lossy formats such as MP3, AAC and Opus remove sounds the ear is unlikely to notice: at 128 kbps an MP3 needs under 1 MB per minute.
Edit in lossless whenever you can, and convert to a lossy format once at the end. Repeatedly re-encoding MP3 files compounds the artefacts. That is why the Audio Cutter exports WAV.
Guide
Sample rate and bit depth
The sample rate is how many times per second the waveform is measured. 44.1 kHz is the CD standard and 48 kHz is the video standard. Bit depth sets the dynamic range: 16-bit is plenty for finished audio, while 24-bit gives extra headroom while recording and mixing.
| Format | Type | Typical bitrate | Size per minute (stereo) | Best for |
|---|---|---|---|---|
| WAV | Lossless (uncompressed) | 1,411 kbps | ≈ 10.1 MB | Editing, archiving |
| FLAC | Lossless (compressed) | ≈ 700–1,000 kbps | ≈ 5–7 MB | Music libraries |
| MP3 | Lossy | 128–320 kbps | ≈ 0.96–2.4 MB | Universal playback |
| AAC / M4A | Lossy | 96–256 kbps | ≈ 0.7–1.9 MB | Apple devices, video |
| Opus | Lossy | 32–160 kbps | ≈ 0.24–1.2 MB | Voice, streaming, web |
Frequently asked questions
Common questions about audio tools.
Can I cut an MP3 without losing quality?
The Audio Cutter decodes the MP3 and exports the selection as lossless WAV, so the cut adds no further compression. If you need an MP3 again, convert the WAV once at the end.
Can I extract the audio from a video?
Yes. Open the video in the Audio Cutter. Your browser decodes the soundtrack, which you can trim and export as WAV.
What format does the voice recorder save?
It uses your browser's recorder. Chrome, Edge and Firefox usually produce WebM or OGG with the Opus codec, and Safari produces M4A (AAC). All of them play in modern browsers and media players.
Is the metronome accurate?
Yes. Clicks are scheduled ahead of time on the Web Audio clock rather than with JavaScript timers, so the tempo stays stable even if the page is busy.
Do I need special hardware?
No. Any built-in or USB microphone works for recording, and headphones are recommended for tone generation and editing.