About the Audio Equalizer
This equaliser changes how loud each part of the sound spectrum is, from deep bass to bright treble. Load an audio file, move the ten sliders between 32 Hz and 16 kHz, listen to the result while you adjust, and save it as a WAV file. Presets such as bass boost, vocal and less harsh give a quick start, and a curve shows exactly what your settings do to each frequency. The audio is decoded and processed on your device with the browser's built-in filters, so the file never leaves your computer or phone.
Updated September 2026
How to use the Audio Equalizer
- 1Select an audio file: MP3, M4A, OGG, FLAC or WAV.
- 2Press Play with equaliser and move the sliders while it plays to hear each change.
- 3Start from a preset if you like, then fine-tune the bands.
- 4Leave the volume option on to stop boosts from distorting the sound.
- 5Press Save as WAV to process the whole file and download it.
What each band does
- 32 to 64 Hz: sub-bass, the rumble and thump you feel more than hear.
- 125 to 250 Hz: bass and warmth. Too much makes voices boomy.
- 500 Hz to 1 kHz: the body of voices and most instruments. Cutting here can sound hollow.
- 2 to 4 kHz: presence and clarity of speech, where the ear is most sensitive.
- 8 kHz: brightness and the hiss of consonants.
- 16 kHz: air and sparkle. Very high, so the change is subtle.
Getting a good result
Small moves usually sound better than big ones. Try a few decibels first, and cut the band that bothers you instead of boosting everything else. Because every boost adds loudness, the tool can lower the overall volume if the result would go past the maximum level, which avoids the harsh crackle of clipping. The message after saving tells you when it did.
For speech, the Vocal preset lowers the rumble below 125 Hz and lifts the range around 1 to 4 kHz, which helps voices cut through. For music on small speakers, a bass boost on the 64 and 125 Hz bands adds weight. Less harsh eases the top end of bright or tinny recordings.
What to know before you save
The output is an uncompressed WAV file, so it is larger than an MP3 of the same length, roughly 10 MB per minute for stereo CD quality. Very long files are refused with a message, because the browser has to hold the whole recording in memory. Cut a long file down first with the Audio Trimmer.
The preview plays the same filters as the saved file, yet listening on phone speakers hides low bass. Use headphones if you want to judge the bass and treble properly. An equaliser cannot repair a damaged recording or remove noise. It only reshapes what is already there. When the sound is fixed, shorten it with the Audio Trimmer or slow it down with the Audio Speed Changer. Short on space? The Audio to WAV Converter changes the format, and the Audio Joiner puts several tracks into one file.
Features
- Ten bands from 32 Hz to 16 kHz, ±12 dB each
- Live preview while you move the sliders
- Seven presets, including bass boost and vocal
- Curve that shows your settings
- Automatic volume reduction to avoid clipping
- Saves a 16-bit WAV, same length as the original
Frequently asked questions
How do I boost bass in an audio file?
Load the file, pick the Bass boost preset or raise the 32, 64 and 125 Hz sliders, then save. Start with about 4 to 6 dB, and keep the option to lower the volume switched on so the boost does not distort.
Does the equalizer change my original file?
No. Your file stays as it is. The tool makes a new WAV file named after the original with “-eq” added.
Why is the saved file a WAV?
WAV needs no encoder, so it can be made quickly in the browser without losing quality. If you need an MP3, convert the WAV with another tool afterwards.
Is my audio uploaded anywhere?
No. The file is read and processed by your browser, and the result is created on your device.
Why did the volume drop after saving?
Boosting bands makes the signal louder. When it would go over the maximum level, the tool reduces the overall volume by the smallest amount that prevents distortion. You can turn this off, but loud parts may then crackle.
Can I make a voice clearer?
Try the Vocal preset, which reduces low rumble and lifts the 1 to 4 kHz range where speech is clear. It helps, but it cannot remove background noise or echo.
Which files can it open?
Any audio format your browser can play, typically MP3, M4A, AAC, OGG, FLAC and WAV. If the browser cannot decode a file, you will see a message and can convert it first.