Free 10-Band Audio Equalizer

Boost the bass, cut the highs, fix muddy vocals, or just dial in a genre preset. Ten peaking filters at the standard ISO octave centers, live preview, and download as MP3, WAV, FLAC, AAC, or M4A. 100% in your browser — nothing uploaded.

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Your audio is never uploaded. Decoding, EQ filtering, and encoding all happen in your browser — nothing is sent to a server. Privacy policy.

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Presets:

Frequency response (+12 / 0 / -12 dB)

Live preview — adjust sliders while playing.

Output format: MP3 320 preserves your EQ work with broad compatibility.

10-band audio equalizer + bass booster — free, private, no sign-up

SnipSound's Audio Equalizer puts ten peaking filters at the standard ISO octave centers (31 Hz to 16 kHz) so you can shape the frequency balance of any audio file. Use the genre presets as starting points, drag individual sliders for fine-tuning, preview the result live, then download as MP3, WAV, FLAC, or any of the other supported formats. Everything runs in your browser; nothing is uploaded.

Genre presets — what each one does

Flat

No EQ applied — all bands at 0 dB. Use this as the reset / starting point.

Bass Booster

+8 dB at 31 Hz, +6 dB at 62 Hz, +4 dB at 125 Hz. Adds weight and warmth to thin-sounding speakers or earbuds. Watch for clipping on already-loud sources.

Treble Booster

+3 dB at 4 kHz, +5 dB at 8 kHz, +6 dB at 16 kHz. Adds air, brightness, and crispness to dull-sounding recordings.

Vocal Boost

-3 dB at 250 Hz (cuts muddiness), +3 dB at 2 kHz, +4 dB at 4 kHz (presence range). The classic "make vocals cut through" recipe.

Podcast

-6 dB at 31 Hz, -3 dB at 62 Hz (HPF substitute), -2 dB at 250 Hz (mud cut), +3 dB at 4 kHz (intelligibility). Tightens spoken-word audio recorded on real-world mics.

Pop

+4 dB at 31 Hz / 62 Hz, +2 dB at 4 kHz / 8 kHz. Modern radio-friendly "smile" curve — bass lift + treble shelf, mids untouched.

Rock

+5 dB at 31 Hz / 62 Hz, +3 dB at 4 kHz, +4 dB at 8 kHz. Punchier bass + bright cymbals. Pairs well with electric-guitar material.

Hip-Hop

+7 dB at 31 Hz (sub-bass), +5 dB at 62 Hz, -2 dB at 500 Hz (clear the muds), +3 dB at 8 kHz. Heavy low-end with sparkle on hats.

Classical

+2 dB at 62 Hz, +1 dB at 250 Hz / 500 Hz, +2 dB at 8 kHz. Gentle, balanced lift that respects the original mix.

Loudness (V)

+4 dB at 31 Hz, +3 dB at 62 Hz, +3 dB at 4 kHz, +4 dB at 8 kHz, +5 dB at 16 kHz. Classic "loudness contour" — boosts the frequencies that human hearing under-perceives at low playback volumes. Great for background listening on small speakers.

Common use cases

🔊 Add bass to laptop / earbud audio

Small speakers can't produce sub-bass. Boosting 31–125 Hz adds the perception of weight without needing a subwoofer.

🎙 Clean up a podcast recording

Cut 250 Hz mud, lift 2–4 kHz presence. Pairs well with the Silence Remover and Volume Booster for a full episode-prep workflow.

🎵 Make a dull-sounding MP3 sparkle

Old / low-bitrate MP3s often lose high-end. The Treble Booster preset puts some of that back.

🎧 Match the curve a venue wants

DJs prepping for a specific venue can pre-EQ a set to match the room's PA tilt, saving on-the-fly knob-twisting.

📻 Voice-over for video

High-pass-ish cut at 31–62 Hz removes rumble; +3–4 dB at 4 kHz keeps the voice intelligible under music beds.

🎮 Twitch / Discord stream audio

Preview captures often have boomy room tone. Cut 100–250 Hz to tighten, boost 2 kHz for clarity over voice chat.

How the EQ works under the hood

Ten peaking BiquadFilter nodes are chained in series in a Web Audio graph. Each filter is centered on a standard ISO octave frequency (31, 62, 125, 250, 500, 1000, 2000, 4000, 8000, 16000 Hz) with Q = 1.41 (one-octave bandwidth) and a gain that ranges from -12 dB to +12 dB. The same biquad topology is used in Pro Tools, Logic, and most hardware mixing consoles — it's the standard graphic-EQ implementation.

The live preview routes audio through these filters via a regular AudioContext, so slider moves are reflected immediately as you play. The download is rendered separately via OfflineAudioContext with the exact same filter chain, then handed to the SnipSound encoder for export.

Why use SnipSound's equalizer

100% in your browser. Most online EQs upload your file to a server (Hearably is a notable exception). We don't — your audio never leaves your device.
10 bands, not 5. Many free online EQs ship with 3–5 bands, which can't isolate the muddiness band (~250 Hz) from the warmth band (~125 Hz). Ten bands let you target with precision.
Genre presets that aren't lies. Each preset shows you exactly which bands move and by how much — no magic, just a starting point you can adjust.
Live frequency-response curve. The graph at the top of the editor shows the combined EQ curve as you adjust sliders, so you can see what you're doing instead of just hearing it.
Real BiquadFilterNode math. Web Audio's BiquadFilter is the same topology as professional DAW EQs. The output sounds like the preview because it IS the preview, just rendered offline.

Related tools

Audio equalizer FAQ

How does the EQ work?▼

Ten peaking filters are chained in series at the standard ISO octave centers: 31, 62, 125, 250, 500, 1000, 2000, 4000, 8000, and 16000 Hz. Each slider boosts or cuts its band by up to ±12 dB. The chain is rendered via OfflineAudioContext for the final download, and previewed live through a regular AudioContext as you adjust the sliders.

Which genre preset should I pick?▼

Start with Flat (no change) and adjust from there. Use Bass Booster or Hip-Hop for low-end emphasis. Use Vocal Boost or Podcast for spoken-word clarity (3 kHz lift, slight 200 Hz mud cut). Classical is gentle and balanced; Rock and Pop add bass + treble shelf. None of these are "correct" — they're starting points.

Can I boost just the bass?▼

Yes. Pick the Bass Booster preset (lifts 31 Hz, 62 Hz, and 125 Hz by 6–8 dB), or set those three sliders manually. Watch for clipping on already-loud sources — the live preview keeps you honest.

Why does my audio sound distorted after a big boost?▼

EQ boosts add gain at specific frequencies. If your source was already mastered loud, a big boost pushes the signal past 0 dBFS and clips. Either lower the boosts a bit, or normalize the audio first using our Volume Booster or LUFS Audio Normalizer, then EQ.

Will EQ change the file length or format?▼

Length stays exactly the same — EQ only changes the frequency balance, not the duration. You can pick any output format (MP3 320/256/192/128, WAV, FLAC, OGG, AAC, M4A) — defaults to MP3 320 for size + compatibility.

Is my audio uploaded to a server?▼

No. Decoding, filtering, and re-encoding all happen in your browser using the Web Audio API. Your audio never leaves your device.

What input formats are supported?▼

Any audio format your browser can decode — MP3, WAV, OGG, FLAC, AAC, M4A. Output formats include MP3 (320, 256, 192, 128 kbps), WAV, FLAC, OGG, AAC and M4A.