Audio Equalizer
Adjust bass, mid, and treble frequencies
Click or drop an audio file hereChoose an audio file
About Audio Equalizer
Audio Equalizer has three bands: a low shelf at 200 Hz (Bass), a peak at 1 kHz (Mid) and a high shelf at 3 kHz (Treble), each adjustable from -12 to +12 dB. Press play and the sliders act on the sound live; "Export as WAV" then renders the whole file through the same settings, without real-time playback. If your settings push the sound past full scale, the export lowers the whole file just enough and says by how many dB. WMA, AC3, and AMR files, which browsers cannot decode, are first read by ffmpeg.wasm. The export is always a 16-bit WAV.
How to equalize an audio file
- 1Pick or drop an audio file; a player appears above the three sliders.
- 2Press play, then move the "Bass", "Mid", and "Treble" sliders while you listen.
- 3Click "Export as WAV" to render the file with the current settings.
- 4Listen to the result, then click "Download" to save equalized_ followed by your file name, as WAV.
Formats and limits
- Input formats
- MP3, WAV, M4A, AAC, FLAC, OGG, OGA, Opus, WMA, AC3, AIFF, AIF, AMR, MKA, WEBA, CAF, MP2, M4B, M4R, WV, AU
- Output format
- WAV, 16-bit PCM, at the sample rate your browser decodes at
- Bands
- Bass: low shelf at 200 Hz · Mid: peak at 1 kHz · Treble: high shelf at 3 kHz · each from -12 to +12 dB
- File size
- 750 MB on a computer, 300 MB on a phone or tablet: the whole file is decoded in your browser's memory before export, and a larger one is refused as soon as you choose it.
Where your file is processed
The Web Audio API applies the three filters on your device, both for the live preview and for the exported WAV, which is assembled in this tab; ffmpeg.wasm, downloaded from unpkg.com, steps in only when your browser cannot decode the file itself (WMA, AC3, or AMR, for example). The audio itself is not uploaded. When the page shows an error, that message, cleaned, goes to our error log with the tool name and your browser's name and version.
Frequently asked questions
Can I hear the changes before exporting?
Yes. Start the player above the sliders: every move of Bass, Mid, or Treble changes the sound at once. Formats your browser cannot play, such as WMA or AMR, have no live preview, but "Export as WAV" still applies the settings to the whole file.
Will a big bass boost make the export distort?
No. If the rendered sound goes past full scale, the whole file is lowered just enough before saving, and the page tells you by how many dB. The live preview has no such protection, so it may crackle at high settings while the export stays clean.
Can I save the result as MP3?
No, the export is always a 16-bit WAV, at the sample rate your browser decodes at. Convert it afterward with Audio Converter if you need MP3, FLAC, or another format.
Can I save my settings as a preset?
No. The three sliders start at 0 dB on every visit and nothing is stored. Note the values if you want to apply the same curve to another file.
Tips and tricks
- ✓If the export note says the file was lowered, reduce the boosts a little to keep the original level.
- ✓Open the exported WAV in Audio Waveform Generator to see where the loudest peaks are.