StackQuil Download Manager · macOS and Windows
SQDM splits a download into parts, fetches them at the same time and writes each one straight to its place on your disk. When a part finishes early, it takes over half of the slowest one — so the last percent never drags.
SQDM runs on macOS and Windows computers. Open this page on one to download.
The app
A native window on each system: the Mac version uses the macOS toolbar and menu bar, the Windows version its own title bar and menus. Same features, same shortcuts.
Why SQDM
Each file is split across up to 32 connections at once — 8 by default.
A part that finishes early takes over half of the slowest one, so the end never drags.
Resumes after a crash or a reboot, and first checks the file hasn’t changed on the server.
If a site answers 429 or 503, SQDM uses fewer connections and remembers that site’s limit.
Optional bonding sends parts of one file over broadband and a phone hotspot together.
After a download: unpack, scan with ClamAV or Microsoft Defender, move, rename or run a command.
| What | Browser | SQDM |
|---|---|---|
| Connections per file | Usually one | Up to 32 (8 by default) |
| The last few percent | Waits on the slowest connection | Finished parts take over unfinished ones |
| Crash or reboot mid-download | Often starts again | Resumes, after checking the file didn’t change |
| Servers that limit you | Keeps retrying the same way | Backs off and remembers the site’s limit |
| When it’s done | The file sits in Downloads | Unpack, virus scan, move, rename or run a command |
| Organising | One download list | Queues, scheduler, monthly data cap, sleep or shut down when done |
Speed depends on the server: SQDM helps most where a server limits each connection. If a server won’t send parts, SQDM uses one connection like the browser does.
How it gets the speed
Most servers cap each connection, not each person. One connection to a busy mirror might crawl at 1 MB/s while your line could take twenty times that. SQDM opens several and keeps them all busy.
A tiny request (the first byte) tells SQDM the size, the real file name and whether the server can send parts.
The file is cut into parts — 8 by default, up to 32 — and each part gets its own connection.
A part that finishes early takes over half of the part with the most left. No connection sits idle.
Every part writes straight into its position in one pre-sized file. Nothing to join at the end.
Simulation: a 200 MB file, a server that allows about 1 MB/s per connection, a 25 MB/s line.
If a server starts refusing (HTTP 429 or 503), SQDM drops connections instead of hammering it, and remembers the limit for that site next time.
Beyond speed
Have broadband and a phone hotspot? Turn on bonding and SQDM sends parts of the same file over both. It weighs each network by how fast it really is, and if one drops, its parts move to the other without starting over.
SQDM reads a remote ZIP’s table of contents without downloading it. Tick the files you need and it fetches only their bytes, then unpacks them and checks each one’s CRC.
— of 9.7 GB—
Example archive: the numbers update as you tick files.
Browser extension
The extension hands downloads over to SQDM with the page’s cookies and referrer, so links behind a login work too. If SQDM isn’t running, the browser just downloads as usual.
| Browser | Status |
|---|---|
| Chrome | WorksAdded from the app’s “Add SQDM to your browser” guide. |
| Edge | WorksSame build as Chrome. |
| Brave | WorksSame build as Chrome. |
| Firefox | TemporaryLoads as a temporary add-on until it is listed on Firefox Add-ons. |
Store listings (Chrome Web Store, Edge Add-ons, Firefox Add-ons) are not live yet.
Who it’s for
Hostel or campus Wi-Fi drops? Downloads resume where they stopped. Schedule big files for the night and watch your monthly data.
Footage, sample packs, project archives. Take just the files you need out of a large online ZIP, and unpack automatically.
Queue game files and patches, start them at night and let the computer sleep when done. Magnet links and .torrent files when you turn torrents on.
Rules that scan, move and rename what arrives, a Telegram bot for remote control, and a data dashboard per site and network.
Native app for macOS or Windows. Your 30-day trial starts — no account, no card.
Chrome, Edge or Brave. Browser downloads go to SQDM with the page’s cookies, so logins keep working.
Click a link as usual. SQDM splits it, queues it, and does what you asked when it finishes.
Pricing
Every feature during the trial, no account.
See how licensing worksFreefor 30 days
Every feature, no account, nothing to fill in. Install it and it starts.
On requestper computer · monthly, yearly or lifetime
Keep using SQDM after the trial with a license key for your computer.
Everything. All features work for 30 days from the first start — parallel connections, queues, scheduler, bonding, the browser extension, torrents and automation.
No. Install SQDM and the trial starts. Nothing to sign up for and no payment details.
Downloads pause and SQDM shows your computer’s Machine ID. Send it to us for a license key, paste the key, and everything continues where it stopped.
Monthly, yearly and lifetime. Each key is made for one computer; for a second computer you get a second key. Prices on request.
No. The key is checked on your computer, so it works offline too.
To your own disk: Downloads/SQDM, sorted into Video, Music, Documents, Compressed, Programs and Other. You can pick any folder instead.
No. The engine runs on your computer and only listens on 127.0.0.1. Nothing is uploaded. Optional extras — Telegram, opening SQDM from your phone — stay off until you turn them on.
It helps most when the server limits each connection, which busy mirrors and file hosts often do. If a server doesn’t allow downloading in parts, SQDM falls back to one connection — no faster, and that server can’t resume either.
Only plain video and audio files with a direct link. It does not touch DRM-protected or streaming-site content.
The current builds are not code-signed yet. On macOS, right-click the app and choose Open; on Windows, choose More info → Run anyway. The Download page shows the checksums so you can confirm the file is ours.
Resume what breaks, queue what’s next, automate what comes after. Every feature free for 30 days — no account. After that, a license key for your computer: monthly, yearly or lifetime.
