Real-time file watcher
Every create, edit, rename and delete is detected the moment it happens. Squirrel reacts in milliseconds, so your work is backed up before you close the tab.
Free & open source · Windows 10/11
Your folders,
everywhere. Instantly.
Squirrel keeps any folder on your PC in perfect sync with Google Drive, OneDrive, Dropbox, MEGA and iCloud Drive — in real time, straight from your desktop. No browser tabs, no dragging, no waiting.
Synced7.7 GB today
5,988 files3 folders watched
Works with the clouds you already use
Google Drive
OneDrive
Dropbox
MEGA
iCloud Drive
5
cloud providers
0
bytes of telemetry
0%
CPU in Smart mode
2
way sync, offline-safe
Why Squirrel
Everything sync should be.
Everything sync should be.
Nothing it shouldn't.
Cloud clients are bloated, opaque and tied to one vendor. Squirrel is a single, tiny desktop app that watches the folders you choose and mirrors them to the cloud you choose.
Multi-cloud, at once
Connect several providers and give each folder its own destination. Personal stuff to Drive, client work to Dropbox — no conflicts, no account juggling.
Two-way offline reconciliation
Deleted something on the web while your PC was off? On startup Squirrel diffs local and remote manifests and applies changes cleanly in both directions.
Built for heavy workflows
DAW project saves, IDE builds, game assets, VM images. Squirrel keeps up without eating your CPU, even when thousands of files change at once.
Precise ignore rules
Filter out .tmp, node_modules, .git, .DS_Store, cache files or anything you define. Only meaningful data travels.
Pause, resume, cancel
Full control over running jobs. Throttle a big upload, stop a batch before a meeting, or resume later exactly where you left off.
One-click OAuth sign-in
No developer console, no API keys to copy-paste. Click sign in, approve in the browser, and the account is connected — tokens stay local.
History & activity log
Every batch is recorded locally: files moved, bytes transferred, timestamps. See exactly what Squirrel did overnight — without any cloud account.
Setup in under a minute
Three steps. Then forget it's there.
01
Pick a folder
Point Squirrel at any directory — a project, a photo library, your whole Documents folder. It doesn't move or restructure anything.
02
Connect your cloud
One click opens your browser for OAuth. Grant access, come back, done. MEGA uses encrypted email login instead — no developer console required.
03
Work as usual
Save files the way you always do. Squirrel handles the rest in the background and writes everything into its own Squirrel folder on the cloud.
Performance profiles
Speed when you need it.
Speed when you need it.
Silence when you don't.
One slider decides how aggressively Squirrel works. Switch profiles at any time — even mid-sync — and it adapts instantly.
High Speed (Turbo)
Maximum bandwidth, zero delay between files. Best for bulk imports, migrations and first-time uploads of large folders.
ThroughputMaximum
CPU impactHigher
Battery impactNoticeable
CPU usage
Smart mode
< 0.5%
Measured during continuous IDE builds and DAW project saves. Squirrel never blocks your foreground apps.
Files watched5,988
QueueEmpty
Sync modeTwo-way
Privacy by design
Your files never touch our servers.
Your files never touch our servers.
Because there are none.
Squirrel is local-first. Data moves directly between your computer and the cloud provider you authorized. No analytics, no tracking pixels, no license checks, no remote config.
- ✓ Tokens stay on your disk in the local
config/folder - ✓ Google scope limited to
drive.file— only files Squirrel creates - ✓ Disconnect revokes access and deletes saved tokens
- ✓ Full source available for audit — MIT licensed
Permission scope
scope
=
"…/auth/drive.file"
Squirrel can
- Create its own
Squirrel/folder - Read & update files it created
- Sync your selected local folders
Squirrel cannot
- See your photos or documents
- Read your Gmail
- Touch anything it didn't make
Start syncing in 60 seconds.
Free forever. No account, no subscription, no “upgrade to Pro”. Just a squirrel doing the heavy lifting.
Prefer to build from source?
git clone https://github.com/ArdaG1/Squirrel.git
cd Squirrel
npm install
npm startRequires Node.js 18+ and npm.
Questions
Good to know
Is Squirrel really free?
Yes. Squirrel is free and open source under the MIT license. There is no paid tier, no file-count limit and no ads.
Does it work with multiple Google accounts?
Each provider connection is stored separately, so you can attach accounts per provider. If you need a specific OAuth client, open Advanced: Developer Credentials and point Squirrel at your own credentials.json.
What happens if I delete a file while Squirrel is closed?
On the next launch Squirrel compares the local and remote manifests. Deletions and changes made on either side are reconciled cleanly, in both directions — no ghost files, no duplicates.
Will it slow down my computer?
In Smart mode Squirrel inserts a 100 ms throttle between file operations, keeping CPU usage below 0.5% even during intense workflows. Eco throttles further for battery life, while Turbo uses everything available.
Can it see my other cloud files?
No. For Google Drive, Squirrel requests only the drive.file scope, meaning it can only access files and folders it created itself. Other providers use similarly narrow permissions, and all tokens remain on your machine.
Which platforms are supported?
The current release targets Windows 10 and 11 (x64) with both an NSIS installer and a portable executable. The interface itself is built with Electron and web technologies, so other platforms are on the roadmap.
Where does my data go on the cloud?
Squirrel writes everything into a dedicated Squirrel folder in your drive. Nothing is moved or restructured elsewhere, so you can always find — or remove — exactly what it uploaded.
Stop dragging files into a browser.
Let a squirrel handle it.