An audio equalizer that changes the file, not just the playback
This audio equalizer lets you turn the bass up, soften harsh treble, make a voice clearer or fix a thin recording, and then saves the result as a new file. Most online equalizers only change what you hear while a player is open. Here you pick a song, a voice memo or a podcast episode from your device, shape its frequencies, listen to a ten-second preview, and download an MP3, M4A, WAV, FLAC or OGG file with the changes built in.
Choose a graphic equalizer with 5, 10 or 31 sliders when you want to see the whole spectrum at once, or the parametric equalizer when you want exact control: five bands, each with a type (bell, low shelf, high shelf, high-pass, low-pass or notch), a centre frequency, a gain and a width. A curve above the controls shows the exact response you are building.
Everything is processed in your browser tab. The file is never uploaded, there is no sign-up and no watermark.
How to use the Audio Equalizer
- Drop an audio file onto the box or click to choose one (MP3, WAV, M4A, AAC, OGG, Opus, FLAC or WebM, up to 20 minutes).
- Pick Graphic or Parametric. For graphic, choose 5, 10 or 31 bands and a preset such as Bass boost, Vocal boost or Podcast clarity, then fine-tune any slider. For parametric, choose a preset or set each band by hand.
- Watch the curve, press Preview 10 seconds to hear the result from the marker on the waveform, and adjust until it sounds right.
- Leave the limiter on so boosted peaks cannot clip, choose a format, press Apply equaliser and download the file.
Audio Equalizer features
5, 10 and 31-band graphic EQ
Octave bands from 31 Hz to 16 kHz, a simple 5-band layout, or the full ISO third-octave set from 20 Hz to 20 kHz. Each slider moves ±12 dB.
5-band parametric EQ
Bell, shelf, high-pass, low-pass and notch filters with frequency, gain and Q, for surgical fixes such as cutting mud at 250 Hz.
Presets
Bass boost, bass reducer, treble boost, vocal boost, podcast clarity, loudness, rock, pop, hip-hop, electronic, classical and hiss reduction.
Live response curve
The plotted curve is calculated from the very filters used for the export, so what you see matches what you get.
Limiter and pre-amp
A true-peak limiter holds the result under −1 dBFS, and a pre-amp lowers or raises the whole signal before the filters.
Export to five formats
MP3, M4A (AAC), WAV (16, 24 or 32-bit), FLAC or OGG Vorbis, using the same encoders as the other audio tools on this site.
What each part of the spectrum does
Equalizing is easier when you know where things live. These ranges are a guide, not a rule, and every voice and instrument differs.
| Range | Character | Typical fix |
|---|---|---|
| 20–60 Hz | Sub-bass: felt more than heard | Cut rumble on speech; boost a little for kick and bass |
| 60–250 Hz | Bass and warmth | Boost for fullness; cut around 200–300 Hz if it sounds boomy |
| 250–500 Hz | Low mids, “mud” | A small cut often clears a crowded mix |
| 500 Hz–2 kHz | Body of voices and instruments | Cut for a less “honky” sound |
| 2–5 kHz | Presence and clarity | Boost gently to make words easier to understand |
| 5–10 kHz | Brightness, “s” sounds | Cut to tame harshness or sibilance |
| 10–20 kHz | Air and sparkle | Boost slightly for openness; cut to reduce hiss |
Graphic or parametric?
A graphic equalizer has fixed bands, so you change the level of each one. It is quick, visual and ideal for changing the overall tone of a song. With 31 bands each slider is only a third of an octave wide, which is the layout of professional hardware equalizers.
A parametric equalizer lets you place a band exactly where a problem is, choose how narrow it is (a higher Q is narrower) and pick the filter type. Use it to remove a single resonant frequency, to cut everything under 80 Hz with a high-pass filter, or to shape a voice without touching the rest.
Tips for a clean result
- Cut before you boost. Lowering a problem frequency usually sounds more natural than raising its neighbours, and it leaves headroom.
- Keep changes small. Moves of 2–4 dB are usually enough; extreme settings add noise and distortion.
- Keep the limiter on. Boosting several bands adds up, and a boosted file can clip when played.
- Want only more bass? The Bass Booster adds a low shelf with a limiter in one step.
- Set a consistent loudness afterwards with the Audio Normalizer, or add space with Add Reverb to Audio.
Audio Equalizer FAQ
How do I equalize an MP3 file online?
Drop the MP3 onto this audio equalizer, choose a preset or move the sliders, preview ten seconds, and press Apply equaliser. You download a new MP3 with the EQ baked in.
Is it free, and is my music uploaded?
It is free with no sign-up or watermark. The file stays on your device: decoding, filtering and encoding all happen inside the browser tab.
Does this change the original file?
No. The original is never modified. You always download a new file.
Why does the sound get quieter or distorted after boosting?
Boosting adds level, and a file cannot hold more than 0 dBFS. Keep the limiter on, lower the pre-amp, or boost fewer bands. Cutting the loud bands instead of boosting quiet ones also helps.
Can I save the equalizer settings?
Not yet. Take a note of the preset name and gains if you want to repeat a setting on another file.
Will saving as MP3 lower the quality?
MP3, M4A and OGG are lossy, so a small amount of detail is lost, as with any re-encode. Choose WAV or FLAC to keep everything the filters produced.