Audio Volume Booster Online
Make any audio file louder right in your browser. Pick a +3 to +12 dB preset, preview the result, download the MP3 — no sign-up, and your file is never uploaded.
How to Increase Audio Volume Online
No account, no upload — pick a preset and you’re done.
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.
Pick a Boost Preset
Tap +3, +6, +9, or +12 dB. Start low for mastered music, go higher for quiet voice memos and call recordings.
Preview & Download
Hit Boost Volume, listen to the louder version in the page, then download it as an MP3 at the bitrate you choose.
Why Notevibes Volume Booster
Simple, honest, and built to respect your files.
Four Boost Presets
Tap +3, +6, +9, or +12 dB — no sliders to fiddle with. +6 dB roughly doubles perceived loudness; +12 dB roughly quadruples it.
Preview Before You Save
See the waveform the moment your file decodes, then listen to the boosted result in the page before you download anything.
Never Uploaded
The gain is applied by your own device using the Web Audio API. Your file never leaves your browser — there is nothing to delete because nothing was sent.
Honest About Clipping
Boosting loud audio past the digital ceiling distorts it. We clamp every sample against hard clipping and tell you when to start lower — no fake magic.
Pick Your MP3 Bitrate
The louder file downloads as an MP3 at the bitrate you choose, from 64 to 320 kbps — 192 kbps by default, no watermark.
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 boost happens on your own device. Your recording never touches a server — which is a stronger promise than any “we delete it later”.
No Upload
Gain is applied by your own device
No Account
Start boosting immediately
Works Offline
Once the page loads, no connection needed
What People Boost
One tool for every “why is this so quiet” moment.
Quiet Voice Memos
Make whispered phone memos audible on laptop speakers
Music Too Quiet on Your Phone
Push a track that maxes out your volume buttons up to a usable level
Muffled Call Recordings
Amplify phone-call and meeting recordings so every word comes through
Quiet Interview Takes
Lift a guest who sat too far from the mic before you edit the episode
Easier Listening
Raise lecture and audiobook levels for comfortable playback anywhere
Small-Speaker Playback
Compensate for laptops, car stereos, and tiny Bluetooth speakers
Too Quiet? Make It Louder Without Re-Recording
You recorded the memo, the call, the interview — and it’s barely audible even at full volume. The usual fixes are all bad: install a desktop editor for a ten-second job, or hand your private recording to a converter site that uploads it, queues it, and stamps a watermark on the way out. This booster does the one thing you need: pick how many dB louder, press one button, get the louder file.
Presets instead of guesswork
Four buttons cover the real cases. +3 dB gives mastered music a gentle lift. +6 dB roughly doubles perceived loudness — right for most quiet recordings. +9 and +12 dB rescue whispers and far-away mics. You hear the boosted version in the page before anything downloads, so if +12 was too much, one tap takes you back down.
Honest about the ceiling
Digital audio has a hard maximum, and any tool that claims unlimited boost without distortion is lying to you. We clamp every sample against harsh clipping and say so right next to the buttons. If your file is already loud and you want it louder-feeling rather than clipped, the audio normalizer raises it safely to peak, and the audio compressor tames the peaks so the average can come up.
Private because it never leaves
Voice memos and call recordings are exactly the files you don’t want on someone else’s server. Here the gain is applied by your own device — it’s 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 louder isn’t the whole job
If you’re prepping a podcast or upload and need to hit a specific loudness target, the loudness normalizer matches your file to −16 or −14 LUFS instead of adding blind gain. And when the recording also needs cuts, cleanup, or AI tools, open it in the online audio editor.
Need to Do More Than Boost?
The full Notevibes editor trims, mixes, normalizes, cleans up, and applies AI tools to your audio — then exports to MP3 or WAV.
Free to try · No credit card required
Related Audio Tools
More free AI audio tools from Notevibes — same engine, no sign-up.
Audio Volume Booster FAQ
How do I boost audio volume online?
Drop your audio file onto the booster, pick a preset (+3, +6, +9, or +12 dB), and hit Boost Volume. You can play the louder version right in the page, then download it as an MP3. Everything runs in your browser — no upload, no sign-up, no watermark.
How do I make an MP3 louder?
Drop the MP3 onto the booster and pick how much louder you want it — +3 dB is a gentle lift, +6 dB roughly doubles perceived loudness, +12 dB quadruples it. Hit Boost Volume, play the result to check, and download the louder MP3. Quiet voice memos usually want +6 to +12 dB; already-loud music is safer at +3.
Is this an MP3 volume booster and sound amplifier?
Yes — it works as an MP3 volume booster, sound amplifier, and volume increaser in one. Load an MP3 (or WAV, M4A, FLAC, OGG, or AAC), pick a dB preset, and it makes the audio louder, then exports an MP3 at the bitrate you choose. Whether you call it a sound booster, volume enhancer, or audio amplifier, the result is the same: a clearer, louder file in seconds.
What is dB?
dB (decibel) is a logarithmic unit for sound intensity. On this tool, +6 dB roughly doubles the perceived loudness and +12 dB roughly quadruples it. Because dB is logarithmic, small numbers represent large differences — a +3 dB boost is a noticeable lift without heavy distortion risk.
Will boosting cause distortion?
It can — and we want to be honest about it. If the original audio is already near peak level, boosting pushes samples past the digital ceiling. We clamp each sample to prevent hard clipping, but heavily boosted loud audio can still sound distorted. For mastered music, start with +3 dB. For quiet voice memos or phone recordings, +6 to +12 dB is usually safe.
What is the difference between boosting and normalizing?
Normalizing scales your audio so the loudest peak sits just below 0 dB — it never exceeds the ceiling, so it never distorts. Boosting adds a fixed amount of gain regardless of the current level, which is faster but can clip loud audio. If your file is already loud, use the Notevibes Audio Normalizer instead for a cleaner result.
Is the audio volume booster free?
Yes. Completely free with no sign-up, no watermark, no ads, and no limits on how many files you can process. Max file size is 200 MB.
Is my audio file uploaded to a server?
No. The booster 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 boosted output is exported as an MP3 at 64–320 kbps (192 kbps by default).
Does it work on mobile?
Yes. It runs on Chrome, Firefox, Safari, and Edge on both desktop and mobile. Tap to upload, pick a dB preset, tap Boost Volume, and the louder file downloads straight to your phone.