Online Audio Equalizer
More bass, a clearer voice, less harsh treble: adjust 10 frequency bands or pick a preset, hear the change live, then download your equalized file.
- 10 bands
- 16 presets
- Live listening
- 100% private
100% private — Everything is processed directly in your browser: your files, voice, and image are never sent to Chatzam's servers.
How do you equalize an audio file?
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Add your file
Drag an MP3, WAV, M4A, FLAC, voice memo or video into the box.
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Shape the sound
Tap a preset (Bass Boost, Vocal, Podcast…) or move the 10 sliders while listening to the result live.
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Download
Choose the format and download the file with the EQ applied.
A real equalizer, no software needed
10 bands from 31 Hz to 16 kHz
One band per octave, from sub-bass to bright treble, adjustable from −12 to +12 dB, with an overall gain to compensate.
16 presets
Bass, vocal, podcast, treble, loudness, rock, pop, electronic, hip-hop, jazz, classical, acoustic, small speakers… as a starting point.
Live curve and listening
The response curve is drawn as you adjust, and the preview lets you hear every change immediately.
The file, not just playback
Unlike a music player's equalizer, the setting is saved into the file: it will sound the same on all your devices.
What does each equalizer band do?
The 31 and 62 Hz bands control sub-bass and deep bass, the kind you feel more than hear (kick drum, electronic bass). 125 and 250 Hz add body and warmth, but too much 250 Hz makes the sound "muddy". 500 Hz and 1 kHz carry the core of voices and instruments; too much sounds nasal. 2 and 4 kHz bring presence and intelligibility: this is where a voice becomes clear, or harsh if you overdo it. 8 and 16 kHz control brilliance and air, but also hiss and sibilance.
Boost the bass of an MP3 without distortion
Raising the bass adds energy to the signal: a track that is already loud can then go over the maximum and crackle. The Bass Boost preset mainly raises 31 to 125 Hz; if the tool warns you that the curve goes above +6 dB, lower the overall gain by a few decibels. Another trick is to slightly cut the mids and treble rather than pushing the bass hard: the perceived balance is the same, with no risk of clipping.
Make a voice clearer: EQ settings for podcasts and voice memos
For a voice recorded on a phone or in an echoey room, cut the low end (31 to 125 Hz), which carries handling noise and hum, and slightly raise 2 to 4 kHz for clarity. The Vocal and Podcast presets do exactly that. If the recording has background noise, run it through Remove Background Noise From Audio first; to isolate or remove the vocals from a song, use the Vocal Remover.
Online equalizer or your phone's equalizer?
The equalizer on your phone or music player only changes how things sound on that device. Here, the correction is baked into the file: a song with boosted bass will stay that way in the car, on a Bluetooth speaker or in a video edit. The same filters are used for the preview and for the export, and everything runs in your browser, without uploading the file.
Frequently Asked Questions
How do I boost the bass of an MP3?
Add the file, tap the Bass Boost preset or raise the 31, 62 and 125 Hz sliders, listen to the preview, then download. If the sound crackles, lower the overall gain.
What are the best EQ settings for vocals?
Cut the bass below 125 Hz, raise 1 to 4 kHz a little and avoid pushing 8 and 16 kHz, which emphasize "s" sounds. The Vocal and Podcast presets are a good starting point.
What do Hz and kHz mean?
They are frequencies: small numbers (31, 62 Hz) are low sounds, large ones (8, 16 kHz, meaning 8,000 and 16,000 Hz) are high sounds. Each slider raises or lowers the volume of one range of frequencies.
Why lower the overall gain?
Raising bands adds volume and can make the file clip. Lowering the overall gain by a few dB makes up for it and keeps the sound clean.
Can I equalize the sound of a video?
Yes: drop in the video and the tool keeps its soundtrack, applies the EQ and saves it as an audio file (MP3, WAV, M4A, FLAC or M4R).
Is the file uploaded to a server?
No. The EQ is calculated in your browser: your file never leaves your device. Free, no sign-up.