Download Accelerator

Tracking since May 13, 2026.

Changelog

• Jun 1, 2026
  description

  Download Accelerator speeds up your downloads by splitting files into multiple parts and fetching them simultaneously over parallel connections — similar to IDM or JDownloader, built right into Chrome.
  
  KEY FEATURES
  
  • Parallel connections — split each file into up to 16 simultaneous connections per download
  • Multiple concurrent downloads — run several downloads at the same time
  • Pause & resume — stop and continue any download without losing progress
  • Real-time progress — per-connection speed lanes, live transfer speed and ETA
  • Right-click download — "Download with Download Accelerator" on any link
  • Intercept mode — optionally capture all browser downloads automatically
  • Custom download folder — choose where files are saved
  
  TWO MODES
  
  Browser Mode works out of the box — no installation required. Downloads are handled directly in the browser using parallel Range requests.
  
  Native Mode (optional) unlocks the full potential: a small native helper app opens true parallel TCP connections over HTTP/1.1, bypassing Chrome's HTTP/2 multiplexing for maximum speed. Supports authenticated downloads by forwarding session cookies. Install it once with a single script on macOS or Windows.
  
  SUPPORTED FILE TYPES
  
  Archives (zip, rar, 7z, tar, gz, tgz …), videos (mp4, mkv, mov, avi …), audio (mp3, flac, wav …), disk images (iso, dmg …), documents (pdf, docx, xlsx …), installers (exe, msi, pkg, deb …), and many more.
  
  OPEN SOURCE
  
  Full source code available on GitHub:
  https://github.com/zettifour/download-accelerator
  
  PRIVACY
  
  No data is collected, stored remotely, or shared. All settings are saved locally on your device only.

  Download Accelerator speeds up your downloads by splitting files into multiple parts and fetching them simultaneously over parallel connections — similar to IDM or JDownloader, built right into Chrome.
  
  KEY FEATURES
  
  • Parallel connections — split each file into up to 16 simultaneous connections per download
  • Multiple concurrent downloads — run several downloads at the same time
  • Pause & resume — stop and continue any download without losing progress
  • Real-time progress — per-connection speed lanes, live transfer speed and ETA
  • Right-click download — "Download with Download Accelerator" on any link
  • Intercept mode — optionally capture all browser downloads automatically
  • Custom download folder — choose where files are saved
  
  TWO MODES
  
  Browser Mode works out of the box — no installation required. Downloads are handled directly in the browser using parallel Range requests.
  
  Native Mode (optional) unlocks the full potential: a small native helper app opens true parallel TCP connections over HTTP/1.1, bypassing Chrome's HTTP/2 multiplexing for maximum speed. Supports authenticated downloads by forwarding session cookies. Install it once with a single script on macOS or Windows.
  
  OPEN SOURCE
  
  Full source code available on GitHub:
  https://github.com/zettifour/download-accelerator
  
  PRIVACY
  
  No data is collected, stored remotely, or shared. All settings are saved locally on your device only.
  
  VERSION 1.1.0
  
  • macOS native host rewritten in Swift — single lightweight binary, no Python runtime required. Installs reliably on all Macs.
  • Fixed: max concurrent downloads setting is now enforced correctly.
  • Fixed: browser mode no longer crashes at the end of a download.
  • Improved: download queue with "Queued" status shown in the popup.
  • Improved: welcome page shown on first install with pin and setup instructions.

• Jun 1, 2026
  permissions

  downloads, downloads.open, storage, offscreen, notifications, contextMenus, nativeMessaging, cookies, tabs

  downloads, downloads.open, storage, offscreen, notifications, contextMenus, nativeMessaging, cookies

Permissions & access

Permissions

downloadsdownloads.openstorageoffscreennotificationscontextMenusnativeMessagingcookies

Host access

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Screenshots