How to EQ an audio file online
- Drop an MP3, WAV, M4A or FLAC file on the box above, or tap to choose one.
- Press play. Tap a preset such as Bass boost or Vocal clarity, or drag the ten sliders. You hear changes instantly; tap “Original” to compare.
- Choose MP3 or WAV and tap “Apply EQ & save”. The equalized file downloads to your device.
Each slider is a filter centered on one frequency band: the lowest two control sub-bass and bass (kick drums, bass guitar), 250–500 Hz is body and “mud”, 1–4 kHz is presence and clarity, and 8–16 kHz is air and sparkle. Small moves of 2–4 dB usually sound best; cutting a problem band often works better than boosting everything else.
Want it louder after EQ? Check the result with the LUFS loudness meter.
Frequently asked questions
Is this EQ free?
Yes. No account, no watermark and no limits set by us. Very long files (over about an hour) may be too much for a phone's memory.
Are my files uploaded?
No. The equalizer runs inside your browser using the Web Audio API, so your audio stays on your device.
Which preset should I use for a podcast or voice recording?
Start with “Podcast / voice”: it removes low rumble and adds presence around 2–4 kHz. If the voice sounds boomy, also try “Reduce mud”. For background hiss or hum, use the noise remover first.
How do I boost the bass without distortion?
Use the Bass boost preset or raise the 32–125 Hz sliders a few dB, and keep “Prevent clipping” ticked. It lowers the overall level just enough that the boosted bass doesn't clip.
What do the frequency numbers mean?
They are the centers of each band in hertz (Hz). 32–125 Hz is bass, 250–500 Hz low mids, 1–2 kHz mids, 4 kHz presence and 8–16 kHz treble.
Can I use it on my phone?
Yes. It works in Safari on iPhone and Chrome on Android. Turn your phone sideways for a wider EQ curve.