notevibes. Free Browser Audio Compressor

Audio Compressor Online

Even out the loud and quiet parts of any audio file right in your browser. Pick a preset for more consistent, louder-feeling podcasts, vocals, and music — no sign-up, and your file is never uploaded.

Everything runs locally in your browser — your file is never uploaded.
Files never leave your device
4 tuned presets
Files up to 200 MB
Works on mobile
How it works

How to Compress Audio Online

No threshold math, no metering — drop, pick, download.

1

Drop Your Audio

MP3, WAV, M4A, FLAC, OGG, or AAC up to 200 MB. It decodes right in the browser and shows you the waveform.

2

Pick a Preset

Choose Light, Medium, Heavy, or Voice. Voice is tuned for podcasts and narration; Medium is a safe all-rounder.

3

Compress & Download

Hit Compress, listen to the evened-out result in the page, then download a 192 kbps MP3 — no watermark.

Why Notevibes

Why Notevibes Audio Compressor

Tuned presets, transparent dynamics, no knobs to learn.

One-Click Presets

Light, Medium, Heavy, and Voice are tuned for real material. Pick one and compress — no threshold, ratio, or attack knobs to wrestle with.

Tames Peaks, Lifts Quiet

Loud moments above the threshold are turned down, then makeup gain brings the whole signal back up — so the result feels steady and louder without spikes.

Podcast-Ready Dynamics

The Voice preset keeps spoken word at a consistent, listenable level from the first word to the last, even across a long episode.

Never Uploaded

Compression runs in your browser with the Web Audio API. Your file never leaves your device — there is nothing to delete because nothing was sent.

Clean MP3 Output

The compressed result previews in the page, then downloads as a 192 kbps MP3 — no watermark, no ads, no attribution required.

Free, Anywhere

No sign-up, no daily limits, no watermark. Works on phones, tablets, and laptops in any modern browser.

Nothing to Upload, Nothing to Leak

The compression happens on your own device. Your recording never touches a server — which is a stronger promise than any “we delete it later”.

No Upload

Compression runs on your own device

No Account

Start compressing immediately

Works Offline

Once the page loads, no connection needed

Made for

What People Compress

One tool for every “too loud, then too quiet” recording.

Podcast Vocals

Keep every word at a steady level across a long episode

Voiceover

Even out narration so soft and loud lines sit together

Livestream Levels

Control sudden peaks so viewers aren't blasted mid-scene

Audiobook Narration

Smooth dynamics for comfortable long-form listening

Mix Glue

Add cohesion so a rough mix feels tight and consistent

Gaming Clips

Balance gunfire, voice chat, and quiet moments in one pass

Steady Levels Without a Mixing Desk

You know the recording: one moment the speaker leans in and it’s blasting, the next they trail off and you can barely hear them. Riding a volume fader by hand is tedious, and desktop compressors bury the fix under threshold, ratio, attack, and release knobs. This tool skips all of that — four presets tuned for real material, one tap, and the loud and quiet parts sit together.

Presets that already know the settings

Voice is dialed in for podcasts and narration. Light adds gentle polish to music, Medium is the safe all-rounder, and Heavy clamps down hard on noisy or very dynamic material. Each one carries a sensible threshold, ratio, attack, release, and makeup gain, so you get a professional dynamics curve without touching a single number.

Louder-feeling, not just louder

Compression pulls the peaks down and lifts the average, so audio feels present and consistent — different from a straight volume change. If your file is simply too quiet, the volume booster or the audio normalizer raise the level without reshaping dynamics. And when you just need a hard ceiling so nothing clips on export, reach for the audio limiter.

Private because it never leaves

Interviews and voice recordings are exactly the files you don’t want on someone else’s server. Here the compression runs on your own device — the same Web Audio engine that powers the full Notevibes editor. Because there’s no server doing the work, there’s nothing to meter: no watermark, no daily cap, no sign-up, files up to 200 MB.

When you want the knobs after all

The presets cover most jobs, but sometimes you need to dial threshold and ratio yourself and stack compression with EQ, limiting, and effects. That’s the online audio editor, where you can process whole tracks in one pass and fine-tune every stage.

Need Full Control?

The full Notevibes editor stacks compression with EQ, limiter, bass, treble, and effects — and lets you fine-tune threshold, ratio, attack, and release on whole tracks in one pass.

Free to try · No credit card required

Keep going

Related Audio Tools

More free AI audio tools from Notevibes — same engine, no sign-up.

FAQ

Audio Compressor FAQ

What does an audio compressor do?

It narrows the gap between the loudest and quietest parts of your audio. Peaks above the threshold are turned down, then the whole signal is brought back up with makeup gain — so the result feels more consistent and louder overall without harsh spikes.

Which preset should I pick?

Voice is tuned for podcasts and narration. Light adds gentle polish to music, Medium is a solid all-rounder, and Heavy clamps down hard for noisy or very dynamic material. When unsure, start with Medium.

Will compression make my audio louder?

Yes. By taming peaks and adding makeup gain, compression raises the average level, so your audio feels noticeably louder and more present even though the true peak is controlled.

Is the audio compressor free?

Yes. Completely free with no sign-up, no watermark, and no limits. Max file size is 200 MB.

Is my audio file uploaded to a server?

No. The compressor runs entirely in your browser using the Web Audio API. Your file never leaves your device — nothing is uploaded, stored, or analyzed.

What audio formats are supported?

MP3, WAV, M4A, FLAC, OGG, and AAC. Anything your browser can decode via the Web Audio API will load. The processed output is exported as a 192 kbps MP3.

Does it work on mobile?

Yes. It runs on Chrome, Firefox, Safari, and Edge on both desktop and mobile. Tap to upload, pick a preset, tap Compress.