JSTorrent

About JSTorrent

JSTorrent is a BitTorrent client that downloads torrent files with ease. It runs as a standalone desktop app on Windows, Mac, and Linux, as a native Android app, and as a Chrome extension paired with a companion app on ChromeOS. It also works on ChromeOS Flex, Android phones, and in any Chromium-based browser. See all supported platforms →

Originally built for ChromeOS over 10 years ago, JSTorrent has been rebuilt from the ground up as a multi-platform, open source project.

★ 4.4 (3,800+ ratings) on Chrome Web Store

What users say

"It works great, it's easy to use."

"Essential app"

"Greatest app ever, it easily doubles the functionality of my chromebook. I don't remember it cost any money when i got it, but i would definitely pay for it. Just as good/better than a full desktop torrent client!"

"I know not everyone has a chromebook and it is nice to be able to find a program that simply works, THANK YOU."

Recent Changes

Android v1.0.21 February 23, 2026

Fix .torrent file opening crash (TransactionTooLargeException) by writing torrent bytes to temp file instead of passing base64 via intent extra
Fix activity flags: remove FLAG_ACTIVITY_CLEAR_TASK to avoid destroying running activity, add FLAG_GRANT_READ_URI_PERMISSION for content:// URIs
Show proper filenames from content providers instead of opaque document IDs
Instant pending torrent placeholder while engine starts (for both .torrent files and magnet links)

Android v1.0.20 February 22, 2026

Fix UDP hostname resolution failing on IPv4-bound sockets

Desktop App v0.1.25 February 22, 2026

Fix UDP hostname resolution failing on IPv4-bound sockets
Periodically refresh desktopVersion from rpc-info.json

Extension v1.0.4 February 16, 2026

Minimum backend versions: Tauri App v0.1.24, Android v1.0.18

Extension v1.0.3 February 16, 2026

Context menu options on extension icon: open as tab, popup, or desktop app
Batch piece hash verification (verifyChunks API)
Recursive file listing (listTree) for faster resume and recheck

Android v1.0.19 February 16, 2026

Reduced memory pressure to prevent OOM crashes during endgame

Android v1.0.18 February 16, 2026

`listTree` API for recursive file listing, used in resume/recheck for batched file existence checks
`verifyChunks` API for batch piece hash verification
Android standalone always deleting torrent data on removal
QuickJS FFI boolean coercion bugs in native filesystem

Desktop App v0.1.24 February 16, 2026

Add list_tree endpoint to io-daemon for recursive file listing
Add verifyChunks API for batch piece hash verification
Fix .torrent file open failing for filenames with spaces
Fix tray menu items firing twice on macOS
Sync check menu items between app menu and tray menu on macOS
Aggregate changelogs across skipped versions in update server

Extension v1.0.2 February 11, 2026

Desktop app launch from extension settings with version reporting
Profile picker UI and backend support
Launch page token routing and extension torrent handling
Extension TakeOver flow for desktop mutual exclusion
Shared SQLite KV store for desktop, routed through native host
Tray stats, auto-updater, and extension popup window
Torrent queue management with active download/seed limits
Log viewer, file opening, and completion notifications
Seed rotation and reset command
Resume data verification and auto data check on start
Piece-level no-data timeout for aggressive peer snubbing
RTT-based peer snubbing, adaptive timeouts, and peer caching
Slow-start queue sizing for peer pipeline depth
DiskId plumbing across all platforms for disk I/O layer
Renamed installId to telemetryId across extension codebase
Renamed ChromeExtensionEngineManager to DaemonEngineManager
Simplified config storage to local-only with windowMode setting
Refactored uploader to pull-based model with per-peer send buffer watermarks
Replaced exclusive ownership with soft affinity piece requesting
Replaced piece abandonment with failed-peer tracking
Keep in-flight requests on choke (libtorrent alignment)
Consolidated link handling and improved companion server reliability
Companion token mismatch recovery loop
Magnet link handling
TCP data reordering race condition in onTcpClose
Disconnect peers sending invalid message lengths (>1MB)
Recheck race in torrent file operations

Desktop App v0.1.23 February 11, 2026

Fix formatting (cargo fmt)

Help / FAQ

Bug reports and feature requests are welcome on the JSTorrent GitHub page.

What platforms are supported?

JSTorrent runs on Windows, Mac, Linux, ChromeOS, and Android.

Desktop (Windows/Mac/Linux): Install the standalone desktop app, or use the Chrome extension paired with the desktop app.
ChromeOS: Install the Android app from the Play Store, or use the Chrome extension paired with the Android companion app.
Android: Install the Android app from the Play Store. It works as a standalone torrent client.

Do I need the Chrome extension?

No. The desktop app and Android app both work standalone without the extension. The extension is optional and provides browser integration (intercepting magnet links, right-click to add torrents, etc.).

How do I add a torrent?

Find a torrent file or magnet link on the web, then either:

Click a magnet link (JSTorrent will handle it automatically)
Download a .torrent file and open it with JSTorrent
Paste a magnet link or torrent URL into the app

Where do the files download to?

On desktop, files download to your configured download folder (defaults to your Downloads directory). On Android, you choose a storage location when you first add a torrent.

My torrent isn't downloading!

Check that you have peers available for the torrent. Some torrents have very few seeders and may be slow or unavailable.

If you still have issues, please report them on the GitHub issue tracker.

Does this work with private trackers?

Yes. Download the .torrent file from your tracker's website first, then load it into JSTorrent. Many trackers employ a whitelist for allowed clients. Contact your tracker's administrators if JSTorrent is not whitelisted.

How does ChromeOS work?

On ChromeOS, you can use the Android app from the Play Store as a standalone torrent client — no extension needed.

Alternatively, install the Chrome extension alongside the Android companion app. The extension provides the UI, while the Android app handles file I/O and networking. A one-time pairing step connects them, and after that the extension automatically connects whenever you open it.

The torrent client that runs on any device