Enhance audio. Generate captions. Remove dead air.
Boost volume up to 800%, auto-caption with AI, and cut silence and filler words — all in your browser. Your files never leave your device.
How it works
Drop your file
Drag & drop any MP3, WAV, FLAC, AAC, or M4A file. Nothing is uploaded — everything stays on your device.
Enhance with AI
Boost volume, shape EQ, generate captions, remove silence — preview every change in real-time before exporting.
Export everything
Download enhanced audio (WAV/MP3), SRT captions, and trimmed files — all processed instantly in your browser.
Everything creators need
Mastering-Grade Volume Boost
Amplify audio up to 800% with a 3-band loudness maximizer and look-ahead limiter. Zero distortion, even at maximum boost — the same DSP chain used in professional mastering studios.
AI Auto Captions
Generate accurate subtitles using OpenAI Whisper running directly in your browser. No cloud, no subscription. Export as SRT for YouTube, TikTok, Reels, or any video editor.
Magic Cut
Automatically detect and remove silence, dead air, and filler words like "um" and "uh". Review every cut before exporting — you stay in control of what gets removed.
100% Private & Offline
Your files never leave your device. All audio processing, AI transcription, and editing runs locally in your browser. No upload, no server, no data collection — ever.
Frequently Asked Questions
What can Hearably Studio do?
Hearably Studio is a complete audio and video enhancement platform. Boost volume up to 800% without distortion, shape audio with a 10-band parametric EQ, auto-generate captions using on-device AI, and remove silence and filler words with Magic Cut — all directly in your browser. Your files never leave your device.
How does the AI captioning work?
Hearably runs OpenAI's Whisper speech recognition model directly in your browser using WebAssembly. The first time you use it, a ~40MB AI model downloads and caches in your browser. After that, transcription is instant and works offline. Captions export as SRT subtitle files alongside your enhanced audio.
What is Magic Cut?
Magic Cut automatically detects silence and filler words ('um', 'uh', 'like', 'you know') in your audio. It shows you every detected segment with timestamps so you can toggle KEEP or CUT for each one before exporting. The exported file has all the dead air removed — turning a 20-minute raw recording into clean, tight content.
How do I boost audio volume without distortion?
Hearably uses a professional mastering-grade DSP chain: 3-band Linkwitz-Riley crossover, per-band compression, and a custom look-ahead limiter that catches audio peaks 5 milliseconds before they clip. This means you can safely boost a quiet MP3 to 800% volume while preserving every detail of the original recording.
What formats are supported?
Import: MP3, WAV, OGG, FLAC, AAC, M4A, WMA. Export: WAV (lossless) and MP3 (320/192 kbps). When captions are enabled, an SRT subtitle file is also exported. Video import and export with burned-in captions coming soon.
Is my data private?
Yes — 100%. All processing happens entirely in your browser using the Web Audio API, OfflineAudioContext, and WebAssembly. Your files are never uploaded to any server. There is no data collection, no analytics on your audio, and no server-side processing. This makes Hearably the most private audio studio available online.
What is a look-ahead limiter?
A look-ahead limiter is a professional audio tool that delays the signal by a few milliseconds to detect peaks before they happen. When a peak is detected, the limiter smoothly reduces gain to prevent clipping — unlike a standard limiter that reacts after distortion has occurred. Hearably uses a 5ms look-ahead buffer implemented as a custom AudioWorklet, the same technology used in professional mastering studios.