Tone shaping
Free Online Audio Equalizer
Adjust bass, mid, and treble frequencies with a simple 3-band online equalizer. Shape the tone of music, podcasts, voice recordings, and sound effects. Browser-based EQ with real-time preview and local processing.
Your audio files stay on your device — the EQ runs locally in the browser.
Uses FFmpeg bass, mid, and treble filters for clean frequency shaping.
Shape tone without opening a full DAW or installing any software.
Drag & drop audio here, or click to upload
Supports MP3, WAV, M4A, FLAC, OGG, AAC, and more
How to use the audio equalizer online
- 1.Upload an audio file — MP3, WAV, M4A, FLAC, OGG, or other supported formats.
- 2.Adjust the bass, mid, and treble sliders to shape the frequency balance. Positive values boost, negative values cut.
- 3.Preview the EQ result, choose MP3 or WAV export, and download the equalized audio file.
Why use this equalizer?
Simple 3-band tone control
Bass, mid, and treble sliders give you quick control over the overall tone without the complexity of a parametric EQ.
Fix common audio problems
Cut muddy bass, boost dull vocals, or tame harsh treble. The 3-band EQ handles the most frequent tone issues.
Private browser processing
FFmpeg runs locally on your device. Your audio files stay private and are never uploaded to external servers.
No software installation
Use the online equalizer in any modern browser. No DAW, no plugins, no downloads required.
Common use cases
- •Boost bass and cut treble to warm up a thin, bright podcast recording.
- •Cut muddy low frequencies and boost mids to make a voice recording clearer.
- •Shape the tone of background music to sit better under a voiceover.
- •Reduce harsh treble in a phone recording before sharing.
- •Add presence to a flat-sounding demo mix by boosting the mid range.
Tips for better results
- •Start with subtle moves of 2 to 4 dB. Large boosts or cuts can make audio sound unnatural quickly.
- •Cutting a problem frequency often sounds better than boosting everything else. If bass sounds muddy, cut bass rather than boosting mids and treble.
- •Export as WAV if you plan to do more processing. Each MP3 re-encode adds a small amount of quality loss.
Audio equalizer FAQ
What frequencies do the three bands cover?
The bass band affects frequencies below about 200 Hz. The mid band centers around 1 kHz, covering the vocal and instrument range. The treble band affects frequencies above about 3 kHz.
Is this a parametric or graphic equalizer?
This is a simplified 3-band equalizer focused on the most useful frequency ranges. For more precise control, consider using a parametric EQ in a desktop audio editor.
Is my audio uploaded to a server?
No. The equalizer processes audio locally in your browser using FFmpeg WebAssembly. Your files stay on your device.
Can I use the equalizer on voice recordings?
Yes. Voice recordings benefit especially from mid-range adjustments. Boost mids to add clarity, or cut bass to reduce room rumble and proximity effect.