Audio Equalizer Online - 10-Band EQ and Bass Boost
Pick a preset or move the sliders, hear it live, then download.
An audio equalizer changes the tone of a song or recording, from a bass boost to a clearer voice. You hear the change live against the original, then download the result free, with no upload and no signup.
How to Equalize a Song or Recording in 3 Steps
- Add your file. Drag a song, voice memo or video into the "Select Audio" box, or press it to browse. A player appears with "Play", a position bar and an "Original | Equalized" switch, and "Remove" lets you swap the file.
- Shape the sound. Tap a preset such as "Bass boost" or "Clear voice", or move the "Bass", "Mid" and "Treble" sliders. Press "Play" and flip the switch to compare.
- Save it. Under "Save the equalized file", pick "MP3" or "WAV" as the "File type", press "Apply EQ", then press "Download".
The first time you press a button, the sound engine has to load, so that first wait is longer. After that it is quick, and the page tells you while it loads.
What an Equalizer Changes
An equalizer makes some parts of the sound louder and other parts quieter. It splits the sound into bands, and each band is a slice of low, middle or high notes.
Hz tells you how many times a sound wave repeats each second. Low Hz numbers are deep bass, and high numbers are treble. Loudness is measured in dB, and every band here can go up or down by as much as 12 dB.
This tool uses ten bands, one per octave, from 31 Hz up to 16 kHz (16,000 Hz). An octave is a doubling of the Hz number, so each band sits twice as high as the one before it.
The "Bass", "Mid" and "Treble" sliders and the presets only move these same ten bands. The "Fine-tune: 10 bands" fold-out always shows exactly what is happening.
| Band | What lives there |
|---|---|
| 31 and 62 Hz | Deep bass, sub bass and rumble |
| 125 and 250 Hz | Bass, body and warmth, but also boom and mud |
| 500 Hz and 1 kHz | The middle, where most of a voice and most instruments sit |
| 2 and 4 kHz | Presence, the edge that makes words clear |
| 8 and 16 kHz | Air, sparkle and hiss |
Bass Booster Without Distortion
The "Bass boost" preset raises the five lowest bands, by 6 dB at the deepest end and 1 dB at 500 Hz. Deep notes and kick drums come forward, and the rest of the sound stays as it was.
Boosting normally causes distortion. A song is already close to its loudest possible level, so adding more pushes the loud parts past the limit and they crackle.
This tool finds the highest point of your whole curve and lowers the output by exactly that much, which for "Bass boost" is 8.2 dB.
A line under the sliders says what happened, for example "Output lowered 8.2 dB so the boost does not distort". In our test, a "Bass boost" download peaked at 41 percent of the maximum, far from distortion. When a curve adds nothing, the line reads "Output volume is unchanged".
Because of that cut, a boosted file can feel quieter than you expect. If so, make the whole file louder after you download it.
The "Less bass" preset solves the opposite problem. It lowers the four deepest bands by 8, 7, 5 and 2 dB, which takes the boom out of muddy recordings and small rooms. It lowers nothing else, so the output volume stays the same.
Equalizer for Voice and Podcasts
The "Clear voice" preset cuts rumble, the low thump under a recording, and lifts the part of the sound where words live. It lowers the deepest bands by up to 4 dB and raises everything from 500 Hz to 8 kHz. The biggest lift is 3 dB, at 2 and 4 kHz.
The "Podcast" preset gives a steadier, closer voice sound, with less room noise and less hiss. It cuts the deep bass by up to 6 dB and lifts the bands from 250 Hz to 4 kHz. It also trims the highest band by 2 dB.
A recording made in a small room often sounds boomy. If your voice sounds muddy, try "Less bass" first, then add "Clear voice" if words still feel soft. If the file has long gaps, you can cut the long pauses out of a recording as a separate step.
The 8 Presets at a Glance
| Preset | What it changes | Try it for |
|---|---|---|
| Flat | Nothing, all bands at 0 | A starting point, or a reset |
| Bass boost | More low end, kick drums and deep notes come forward | Songs that sound thin |
| Less bass | Takes the boom out | Muddy recordings or small rooms |
| Treble boost | More sparkle and detail in the high notes | Dull or muffled songs |
| Clear voice | Cuts rumble, lifts the part where words live | Voice memos and interviews |
| Podcast | A steady, close voice, less room noise and hiss | Talking recordings |
| Warm | Softer highs and a little more body | Harsh songs that tire your ears |
| Small speaker | Drops bass a phone cannot play, adds presence | Listening on a phone or laptop speaker |
Hear the Difference Before You Save
You hear every change live while the file plays. Move a slider or tap a preset, and the sound changes right away, with no waiting and no saving.
The "Original | Equalized" switch flips between the two sounds instantly, even in the middle of a song. This is the quickest way to check that you improved the sound and did not just make it louder or different.
The file streams through your browser's own filters while it plays, so the whole song is never loaded into memory. That is why long files and phones work well.
Live preview needs a format your browser can play. For a rare one such as AVI, the page says live preview is off, and "Apply EQ" still works.
Download as MP3 or WAV
Pick "MP3" for a smaller file or "WAV" for an uncompressed one, then press "Apply EQ" and "Download".
MP3 quality is matched to your file, using the closest standard rate of 128, 192, 256 or 320 kbps. Kbps is how much sound data is stored for each second, and a 192 kbps file came out at 192 kbps. WAV is bigger because it is uncompressed.
The download uses the same ten filters as the preview. We checked a "Clear voice" download against the on-screen curve at ten points from 40 Hz to 12 kHz. The largest difference was 0.03 dB, and "Bass boost" matched within 0.05 dB.
On our test computer, a 20 second MP3 took under a second to equalize once the engine had loaded. The tool reads MP3, WAV, M4A, AAC, OGG, FLAC and OPUS, plus video files such as MP4, MKV, WEBM, MOV and AVI. Only the sound of a video is used, and the download is always an audio file.
If the WAV is too big to share, you can make the file smaller afterwards.
Is This an Equalizer for Your PC or Phone?
No, it is not a system-wide equalizer. It changes one file that you pick, and it does not change the sound of games, other apps or everything on your PC or phone.
For whole-device sound, use the sound settings on the device itself. Use this page when you want a better-sounding copy of one song, recording or video.
Made in Your Browser, Nothing Uploaded
Nothing leaves your device. Your file is read, played and equalized inside your browser, and the download is made there too.
Your curve and file type are saved only in your own browser, on your own device, and there is no account and no signup.
Audio Equalizer FAQ
Can I boost the bass in an MP3 without distortion?
Yes, because the tool lowers the output by the highest point of the curve you add. A bigger boost means a bigger cut, and the line under the sliders shows the exact number.
What is the difference between bass, mid and treble?
Bass is the low, deep part of the sound, mid is where most voices sit, and treble is the high, bright part. Each of the three sliders goes from -12 to +12 dB. They move the same ten bands you see in the fold-out, so you can start with them and fine-tune later.
Does the download sound the same as the preview?
Yes, because both use the same ten filters, and the gap we measured was a fraction of one dB. To check it yourself, play the downloaded file next to your original.
Can I equalize the sound of a video?
Yes, you can add a video file such as MP4, MKV, WEBM, MOV or AVI. The tool uses only the sound, so you get an audio file back and not a video with new sound.
Does it work on a phone?
Yes, it runs in the browser on a phone, and long files are fine because the preview streams. Try the "Small speaker" preset if you mostly listen on a phone speaker.