Boostify

Overview

Boostify is a free Chrome extension that enhances audio and video on any site with HTML5 media. A master ON/OFF toggle controls all processing — when off, nothing runs. Boost volume up to 600% via Web Audio API, set playback speed from 0.25× to 4×, and tune video clarity, brightness, contrast, and saturation with a live before/after preview in the popup. Presets cover 4K, Movie, and Game modes, plus a custom preset you can save and pin. The equalizer adds bass, mid, treble, and echo; audio modes include 8D, Voice Focus, and mono. Vocal and music sliders use mid/side separation on stereo sources — useful for karaoke and podcasts, not AI stem separation. Quiet Ads lowers or mutes ad audio on YouTube (volume only — not an ad blocker). Picture-in-Picture, auto-pause when you leave a tab, per-domain allow/block lists, customizable keyboard shortcuts, and dark/light themes round out the experience. All settings stay in chrome.storage.local on the device — no server, no analytics, no sign-in. Version 1.7.7.

Approach

1. 01

   Problem framing for YouTube, streaming, and learning use cases

2. 02

   Popup UX with master toggle, presets, and before/after preview

3. 03

   Web Audio pipeline: gain, EQ, mid/side split, echo, 8D, mono

4. 04

   Video filter system with SVG unsharp mask for clarity

5. 05

   Per-site persistence, site list, and keyboard shortcuts

6. 06

   Privacy-first architecture — strict CSP, no network requests

Outcomes

• Live extension v1.7.7 — load unpacked or Chrome Web Store (coming soon)
• Volume boost to 600% with graceful DRM/CORS fallbacks
• Video presets plus custom save-and-pin workflow
• Quiet Ads for YouTube ad audio without blocking ads
• 100% free — local-only storage, no accounts or tracking

Visuals