Audio Equalizer
Upload any audio file and reshape its frequency balance with interactive EQ slid...Upload any audio file and reshape its frequency balance with interactive EQ sliders. Preview changes in real time, switch between ten genre and correc...
Drop an audio file here or tap to browse
MP3, WAV, M4A, OGG, AAC, FLAC up to 100 MB
Everything in This Tool
Visual sliders, real time preview, and ten presets
Why Use Audio Equalizer?
Presets Pulled from Real Mixing Workflows
These are not random slider positions. The bass boost uses a shelving filter below 250 Hz with a gentle 3 dB slope, the same approach mixing engineers use in studios to add warmth without turning the low end into mud. The treble lift targets frequencies above 8 kHz to bring out cymbal shimmer and vocal air. Bobby Owsinski breaks this technique down in The Mixing Engineer's Handbook, and it has been the standard approach in professional audio for decades. Each preset reflects a specific decision about which frequencies to push and which to leave alone.
Genre Curves That Actually Match How People Listen
Rock music has used the V-shaped EQ curve since the 1970s, scooped mids with boosted lows and highs. Jazz needs smooth upper-mids so sax and piano sit together without fighting for space. Electronic music lives or dies by sub-bass below 80 Hz. These are not opinions. Fletcher and Munson mapped human hearing sensitivity at Bell Labs, and those equal-loudness contours still inform every EQ design built today. The genre presets here follow those same principles so the audio actually sounds right for the style.
A Preset Built Specifically for Speech
The voice enhancement curve targets the 1 kHz to 4 kHz range where consonants live. Audiological research consistently identifies this band as the most important for understanding words clearly, especially through small speakers like phones and laptops. The preset also rolls off low-frequency rumble below 100 Hz, the stuff that comes from air conditioning, traffic outside, and room resonance. The Acoustical Society of America has published data showing that a modest 3 dB boost in the 2 to 4 kHz range measurably improves word recognition in noisy playback conditions.
Lightweight Processing, Quick Results
An EQ adjustment is just a filter pass across the waveform. The server applies an IIR filter (Infinite Impulse Response) that processes each audio sample with a fixed set of math operations regardless of how long the recording is. A thirty-minute file finishes in under fifteen seconds because there is no complex analysis happening, just straightforward sample-by-sample multiplication. Compared to compression, resampling, or format conversion, EQ is roughly ten times cheaper computationally.
When the Equalizer Solves the Problem
Making Up for Cheap Earbuds
Budget earbuds under $30 almost always drop off in bass response below 100 Hz. Independent measurements from rtings.com consistently show a 6 to 10 dB rolloff compared to reference monitors. Running tracks through Bass Boost or the Electronic preset fills in the frequencies your hardware cannot reproduce properly. The result is closer to what the producer actually intended when they mixed the track.
Building a Consistent Playlist for a Party or Event
Tracks from different albums and decades have wildly different tonal profiles. Running them all through the same genre preset creates a uniform sound across the whole set. The Audio Engineering Society calls this system tuning and recommends it for any multi-source playback situation. Your guests hear one consistent sound through the venue speakers instead of jarring shifts between a 1970s vinyl rip and a 2024 streaming master.
Cleaning Up a Room-Tone Interview
Interviews recorded in untreated rooms with hard walls suffer from boomy low-end reflections and muffled vocals. Acoustic research shows this affects the majority of home and office recordings. Voice Enhancement lifts the speech presence range above the room resonance and rolls off the mud below 200 Hz. An unusable raw recording becomes something that actually sounds intentional.
Getting Better Sound from Laptop Speakers
Laptop speaker drivers are physically too small to reproduce anything below about 200 Hz. That is just physics. Applying Treble Boost or the Pop preset pushes energy into the 2 kHz to 8 kHz range where those tiny drivers actually perform well. The audio sounds noticeably fuller and more detailed without needing external speakers or headphones.
Polishing Zoom and Teams Meeting Recordings
Meeting recordings from video calls often sound flat and muddy because participants use different microphones in different rooms. Voice Enhancement brings consonant clarity back to every speaker in the recording, making the playback easier to follow when you revisit it later for notes or quotes.
Preparing Background Music for Video Projects
When you are editing a video and the background music is competing with dialogue, Bass Reduction takes the low-end weight out of the music track so it sits underneath the voice instead of fighting with it. This is a trick video editors use constantly in post-production to keep the mix clean without needing a full DAW.
Conference Presentation Audio
Recorded presentations often sound thin because the speaker was too far from the microphone. Bass Boost adds body back to the voice, and Voice Enhancement sharpens the consonants so every word lands clearly. The audience hears a polished recording instead of a raw capture from across the room.
Lecture Recordings for Students
Lecture halls have terrible acoustics for recording. Hard ceilings and walls create reflections that muddy up the professor's voice. Running the recording through Voice Enhancement before studying makes the content far easier to follow, especially at 1.5x playback speed where clarity matters even more.
How It Works
Upload the Recording You Want to Reshape
Drag an audio file into the upload zone or tap to browse. Accepts MP3, WAV, FLAC, OGG, M4A, and AAC up to 100 MB. Your original file is never modified. The equalizer works on a copy.
Pick the EQ Curve That Matches Your Goal
Open the preset dropdown. If the recording sounds thin, start with Bass Boost. If it sounds muffled, try Treble Boost. For podcasts and interviews, go with Voice Enhancement. Not sure? Run the file through Flat first, then compare to other presets so you hear exactly what changed.
Download and Listen Back
Hit Apply Equalizer and wait a few seconds. The output downloads as a high-quality MP3. Play it on the speakers or headphones you actually use. If the result is not quite right, upload the original again and try a different preset.
Tips for the Best Outcome
Test on the Speakers You Actually Use
A bass boost that sounds great on earbuds can be overwhelming through a subwoofer. After downloading, play the file on the hardware where it will actually be heard before committing to the result.
Use Flat as Your Before-and-After Reference
Process the same file once with Flat and once with your preferred preset. Playing them back to back reveals exactly what the EQ curve changed, so you can tell whether the adjustment is too aggressive or not enough.
Feed It the Highest-Quality Source You Have
If a WAV or FLAC version exists, use that as the input. Applying EQ to a lossless file before MP3 encoding produces a cleaner result than stacking adjustments on top of an already compressed MP3.
Lower Volume First if the Track Clips
Commercially mastered music is often pushed right to the loudness ceiling. Boosting any frequency can cause audible distortion. Reduce the overall volume by a few dB with the Audio Volume tool first, then come back and apply the EQ safely.
Voice Enhancement Works for More Than Podcasts
Audiobooks, lecture recordings, interview captures, conference calls. Anything where someone is speaking benefits from the voice preset. It is not just for podcasters.
Genre Presets Work Best on Full Mixes
The rock, jazz, pop, classical, and electronic curves are designed for complete songs. Applying them to isolated stems like a solo vocal track or a single instrument recording can produce unexpected results since the curve expects a full frequency spectrum.
One Preset Is Usually Enough
Running the same file through multiple presets back to back adds generational loss from re-encoding each time. Pick the one that gets closest to what you want in a single pass.
Works on Mobile Too
Upload from your phone, pick the preset, download the result. The interface adapts to small screens and the processing happens server-side, so your phone does not need to do the heavy lifting.
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