Audio Compressor Online
Even out the loud and quiet parts of any audio file in your browser. Pick a preset and get more consistent, louder-feeling audio for podcasts, vocals, and music — no sign-up, no upload.
Compress Audio in 3 Steps
No threshold math, no metering. Drop, pick, download.
Upload Your Audio
Drag and drop an MP3, WAV, or other audio file. Up to 200 MB.
Pick a Preset
Choose Light, Medium, Heavy, or Voice. Voice is tuned for podcasts and narration.
Compress & Download
Hit Compress, preview the result, and save a 192 kbps MP3 with even, consistent levels.
Why Notevibes Audio Compressor
Tuned presets, transparent dynamics.
One-Click Presets
Light, Medium, Heavy, and Voice presets are tuned for real material — pick one and compress, no knob-twiddling.
Private & In-Browser
Compression runs locally with the Web Audio API. Your file never leaves your device — nothing is uploaded.
Podcast-Ready Dynamics
Tame peaks and lift quiet passages so spoken word sits at a steady, listenable level start to finish.
Works on Any Format
MP3, WAV, M4A, FLAC, OGG, AAC up to 200 MB. Anything your browser can decode loads instantly.
No Watermark
192 kbps MP3 saved straight to your device — no watermark, no ads, no attribution required.
Mobile-Friendly
Compress audio on your phone or tablet. iOS, Android, Chrome, Firefox, Safari, Edge.
Your Audio Stays on Your Device
Every file is compressed locally in your browser using the Web Audio API. Nothing is uploaded, stored, or analyzed.
No Upload
File never leaves your device
No Account
Start compressing immediately
No Tracking
We never see your audio
When to Compress Audio
Most files process in seconds.
Podcast vocals
Keep every word at a steady level across a long episode
Music mastering glue
Add cohesion so a mix feels tight and consistent
Voiceover
Even out narration so soft and loud lines match
Livestream levels
Control sudden peaks so viewers aren't blasted
Audiobook narration
Smooth dynamics for comfortable long-form listening
Gaming clips
Balance gunfire, voice chat, and quiet moments
Need Full Control?
The Notevibes Audio 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.
Open Full Audio EditorConvert Any Audio Format
Free browser-based converters for every major audio format — no sign-up, no upload.
Related Audio Tools
More free browser audio tools from Notevibes — no sign-up, no upload.
Audio Normalizer
Boost audio to peak volume without clipping.
Audio Volume Booster
Increase volume by +3 to +12 dB.
High-Pass Filter
Cut low-frequency rumble below a chosen frequency.
Low-Pass Filter
Cut high-frequency hiss and harshness above a cutoff.
Online Audio Editor
Multi-track browser editor with every tool built in.
MP3 Editor
Full MP3 editor with timeline, effects, and export.
Frequently Asked Questions
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.