01Phase 01
1. 2nd-Order Low-Shelf Biquad Filter
Lifts everything below the shelf frequency you pick (60, 80, 100 or 120 Hz) by 0 to +18 dB to bring up kick drums, 808s, and bass guitar. Lower settings keep the boost away from vocals.
Low-Shelf Biquad Filter · Peak Limiter
Bass Booster Online
Boost the low end of music, beats, and podcasts by up to +18 dB with a low-shelf biquad filter, then a look-ahead peak limiter keeps the result from clipping. Runs in your browser.
Bass Booster
Runs locally in your browserReady
Drop an audio or video file here
WAV, MP3, M4A, FLAC, OGG, MP4, MOV or WebM. Decoded in your browser, never uploaded.
Choose file
100% browser-local processing · No files uploaded to any server
Acoustic Engineering Guide · Architecture
How this tool works in browser memory
How this tool decodes, analyzes, and masters your dialogue locally with zero cloud latency.
02Phase 02
2. Look-Ahead Peak Limiter
A linked look-ahead limiter turns the gain down just before loud peaks, so every sample stays at or below -1.0 dBFS and the file never hard-clips, even at +18 dB.
03Phase 03
3. Lossless 16-Bit WAV Export
Compare Original and Processed with the A/B toggle, then download the result as an uncompressed 16-bit PCM WAV file.
Connected finishing workflows
Explore companion utilities for dialogue cleanup, speech pacing, and mastering.
Audio Standards & Research
Engineering guides & deep-dive workflows
Explore the acoustic principles, ITU-R loudness standards, and pacing techniques behind this tool.
Volume Booster7 min read
How to Boost Quiet Audio Without Digital Clipping or Distortion
Master safe digital gain scaling: how True-Peak limiting and soft-knee dynamics prevent clipping while boosting quiet speech signals up to +18 dB.
Mains Hum6 min read
How to Reduce Hum and Low Rumble in a Voice Recording
Pinpoint 50Hz/60Hz electrical harmonics and sub-80Hz mechanical rumble with steep Butterworth high-pass and notch filtering.
Studio Voiceover8 min read
How to Make Bedroom Voiceovers Sound Like Broadcast Studio Quality
The 6-stage studio mastering chain: 80Hz rumble cut, 200Hz warmth, 3.5kHz clarity boost, downward room expansion, de-essing, and True-Peak limiting.
Frequently Asked Questions
Common Questions & Technical Clarifications
How does the online bass booster work?+
Your audio is decoded in the browser and run through a 2nd-order low-shelf biquad filter that boosts everything below the frequency you choose (60–120 Hz) by up to +18 dB. A look-ahead peak limiter then holds every sample at or below -1 dBFS.
Will boosting the bass cause digital distortion or crackling?+
The exported file will not hard-clip: the limiter keeps every sample at or below -1 dBFS. Very large boosts on music that is already loud make the limiter work hard, which can sound squashed. Use the Original/Processed toggle and lower the boost if it does.
Can I boost bass on video files or music tracks?+
Yes. Drop an MP3, WAV, M4A, or FLAC file, or a video such as MP4 or MOV whose audio track your browser can decode. The boosted audio is exported as a WAV file; the video picture is not re-exported.
Is my audio uploaded to any external server?+
No. 100% of the filtering, limiting, and rendering executes locally in your browser with zero cloud uploads and total privacy.