Treble Booster — Raise the Highs in a Song, Online Free
A real high-shelf EQ: up to +15 dB above 3 kHz, preview and export — nothing leaves your device.
Drop an audio file, or click to browse
MP3, WAV, M4A, OGG, FLAC, and more
Processed locally — your file never leaves this tab
00:00.00 / 00:00.00
Adjust — fades, volume, speed, reverse
Precise times
Muffled, dull audio usually lacks one thing: energy above 3 kHz. The treble booster applies a true high-shelf EQ — up to +15 dB above 3 kHz, the same move a mastering engineer makes to open a track up — not a loudness trick that lifts everything. Drop a file, raise the slider until the detail comes back, and export. Everything runs in your browser: the file is never uploaded.
When to boost the treble
- Make a muffled video or voice recording clearer and crisper.
- Bring consonants and breath back into voices so speech stays intelligible.
- Add sparkle to cymbals and acoustic instruments in a flat-sounding mix.
How to use the Treble Booster
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Drop your audio
Any MP3, WAV, M4A, OGG or FLAC file. Processing stays on your device.
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Raise the treble slider
Up to +15 dB above 3 kHz. +3–6 dB de-muddies most recordings; go higher for a bright, aggressive edge.
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Preview and export
Listen for harshness on sibilants (s, t sounds) — export as MP3 or lossless WAV.
A high shelf above 3 kHz
The treble booster is a high-shelf filter, up to +15 dB above 3 kHz. It amplifies highs the file already has. It does not invent detail that a low-bitrate encode threw away.
A limiter catches peaks so a large boost does not clip hard. The boost also lifts hiss and sibilance that were already in the file.
How far to push it
Listen once on headphones before you export:
- +3 to +6 dB opens up most dull recordings.
- Above +9 dB, s, sh, and t sounds can turn piercing.
- If the file was encoded at a low bitrate, no shelf brings the missing highs back.
Treble, bass, and the equalizer
The bass booster lifts below 150 Hz. This page lifts above 3 kHz. Dull and muffled points here. Thin and small points at bass.
The equalizer is the same three regions with cut as well as boost: low shelf at 150 Hz, a peak at 1 kHz, and this high shelf at 3 kHz. Use the booster when you already know you only want more treble.
Treble Booster FAQ
Is my audio uploaded?
No. The boost is a Web Audio high-shelf filter inside your browser tab — there is no upload step. You can go offline after the page loads and the tool keeps working.
Will boosting the treble reduce quality?
No resampling or pitch change happens. A big boost also lifts hiss and sibilance that was always in the file — if it gets harsh, back the slider off. A limiter catches peaks so the export never clips harshly.
Can it restore detail that was never recorded?
No — a shelf only amplifies high frequencies the file already contains. Audio compressed at a low bitrate loses highs permanently; no EQ brings them back.
How is this different from the bass booster?
They are opposites on the spectrum: the bass booster lifts the low end below 150 Hz, the treble booster lifts the highs above 3 kHz. Dull and muffled? Treble. Thin and small? Bass.
How much treble should I add?
+3–6 dB opens up most dull recordings. Above +9 dB, sibilant sounds (s, sh, t) can get piercing — listen once on headphones before exporting.
Does it work on a phone?
Yes. The editor is built for touch — drag to select, set the slider, export. Works in current Chrome, Edge, Firefox and Safari, on desktop and mobile.
Related tools
Bass Booster
A real low-shelf EQ: up to +15 dB below 150 Hz, preview and export — nothing leaves your device.
Open Bass Booster
Audio Equalizer
Low, mid and high shelves with ±15 dB per band — the honest three-knob EQ.
Volume Booster
Boost quiet tracks and video soundtracks up to 4× — clean, not clipped.