MP3Conv

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Audio Equalizer & Filters

3-band EQ, high-pass and low-pass filters in one tool. Make a thin recording warm, kill rumble, or carve a vocal.

Mode

About this audio equalizer

Three modes in one page. The 3-band EQ gives you bass / mid / treble shelves you can boost or cut by up to ±15 dB. The high-pass filter cuts everything below a cutoff frequency (great for removing rumble or thin-out a mix). The low-pass filter cuts everything above a cutoff (great for killing harsh hiss or making a 'phone' effect).

All five tools share the same EQ engine and re-encode at a sensible quality default.

How to EQ audio online

  1. 01

    Drop in audio

    MP3, WAV, FLAC, OGG, M4A and more.

  2. 02

    Pick a mode and dial in the curve

    3-band for general tone shaping, high-pass for rumble cleanup, low-pass for hiss removal or lo-fi effects.

  3. 03

    Render and download

    The processed file is rendered and offered as a download.

Why use this EQ tool

  • 3-band EQ: bass (low shelf at 110 Hz), mid (peaking at 1 kHz), treble (high shelf at 10 kHz)
  • High-pass filter with adjustable cutoff (20 Hz – 1 kHz)
  • Low-pass filter with adjustable cutoff (1 kHz – 20 kHz)
  • Output keeps the same format as the input
  • Free, private, no install
  • Good for podcasts (cut rumble), music (lift bass), voicechat (telephone effect)

EQ FAQ

What's a typical use for high-pass?

Cutting AC hum, mic-stand thumps and HVAC rumble from voice recordings. 80 Hz is a safe spoken-word cutoff; 100–120 Hz tightens podcasts further.

What does low-pass do?

Removes everything above the cutoff — useful for taming hiss, faking a 'telephone' or 'underwater' effect, or smoothing a harsh recording. Set it to 3 kHz for a phone effect.

How aggressive can I be with the 3-band?

±6 dB sounds noticeable but natural. ±10 dB is dramatic. Past ±12 dB you'll start to hear pumping or distortion on busy material.

Will the audio be re-encoded?

Yes — applying any filter requires re-encoding. The output uses the same format as the input at a sensible quality default.

Pitch, speed, vocals, bass

See all effects tools