StreamFlow: Video & Stream Downloader

About

# StreamFlow – High-Performance Video & Stream Downloader

Detect, filter, and download video and audio streams directly from almost any website with **StreamFlow** – the private, ultra-lightweight, and lightning-fast media downloader. 

Designed on the modern **Manifest V3** API, StreamFlow combines a high-performance background request scanner with local **FFmpeg WebAssembly** remuxing to provide seamless downloads of both standalone media files and fragmented live/on-demand streams.

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### ✨ Key Features

* **Multi-Format Stream Detection:**
  * **HLS (M3U8):** Detects master playlists and splits quality levels automatically.
  * **DASH (MPD):** Automatically intercepts adaptive streaming media manifests.
  * **Static Formats:** Seamlessly scans for static `.mp4`, `.webm`, `.mp3`, and `.aac` media.
* **On-the-Fly Quality Splitting:** Filter and view all available resolutions and bitrates. Download only your desired resolution or grab the highest quality with a single click.
* **Local WebAssembly Muxing:** Combines separate adaptive video and audio tracks directly in your browser using local **FFmpeg WASM** into a clean, seekable MP4 file. 
* **Zero Latency & Bloat:** No heavy background processors running when you aren’t using the extension. Media scanning relies on efficient Chrome API event listeners, resulting in minimal CPU usage.
* **Referer Lock Bypass:** Uses local request header modification to automatically pass security locks (such as 403 Forbidden errors) on protected media segments.
* **Intelligent File Naming Heuristics**: Automatically maps streaming urls to actual page headings (like video titles or author names on social networks) to name files cleanly instead of using generic text.
* **100% Private & Sandboxed:** StreamFlow operates entirely within your browser. There are no tracking scripts, no telemetry, no sign-ups, and no data collection. All video segments are processed and muxed locally.

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### 🎁 Free vs. PRO Mode

StreamFlow is free to use with full capabilities on standard streams. Certain advanced capabilities require a one-time PRO license upgrade:

* **Free Tier:**
  * High-speed stream detection and analysis.
  * Dynamic header/referer injection and local segment buffering.
  * Standard HD downloads (up to 1080p resolution).
  * Concurrent download queue capacity of up to 2 items.
* **PRO Tier:**
  * Unlocks high-definition Ultra HD, 2K, 4K, and 8K streams.
  * Unlocks "Always use FFmpeg remuxing" checkbox to convert standard single-track streams to standard seekable MP4s.
  * Unlimited queue size and parallel downloads.
  * Lifetime license across all of your synced Chrome devices.

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### 🛡️ Privacy-First Guarantee

Unlike common media downloaders, StreamFlow does **NOT** inject remote scripts, does **NOT** track your web history, and does **NOT** communicate with external servers. Every download, file rename, and audio/video remux is executed locally in your browser's private sandbox.