MIT License v2.4.0.1_stable_2026-10-07 ✓ Checksum Published

Download Duplicati Backup for Windows PC for Windows PC

Name: Duplicati Backup for Windows PC
Author: Duplicati Inc.

Duplicati is a free, open source backup tool that encrypts your files locally and stores them on almost any backend — S3, Backblaze B2, Google Drive...

⬇ Direct Download (104.43 MB)

Technical Specifications & System Requirements

Developer Duplicati Inc.

Platform & OS Windows 10 / 11 (64-bit)

Package Size 104.43 MB

Architecture x64 (64-bit)

Package Format MSI Installer

Security Verification SHA-256 checksum published

SHA-256 Cryptographic Checksum Computed from the file we serve

              491b2cabef0106cb7964a7cd2ae54a43cb2f2573d0b84c4af00961d868e1b3b9
            

              $ Get-FileHash .\duplicati-backup-pc.exe -Algorithm SHA256
            

Software notes

The Bottom Line: Duplicati solves the backup problem the way privacy-minded people want it solved: your files are encrypted on your machine, then stored wherever is cheapest, with the provider never seeing a readable byte. That combination — free software, strong encryption, and backend freedom — has no real rival at this price. The scheduling, versioning, and retention controls are genuinely grown-up, the kind of thing small offices pay backup vendors good money for. It is not the smoothest ride, though. The tray-app-that-opens-a-browser-tab design is odd, big first backups are slow, and the documentation assumes you enjoy forums. But backups are judged on restore day, not setup day, and Duplicati restores reliably. If you have ever paid a backup service to hold your unencrypted files, switching to Duplicati plus cheap object storage will save money and sleep. Just do a test restore — with any backup tool, not just this one. Where Duplicati quietly shines is the economics: pair it with Backblaze B2 or Wasabi and a terabyte of versioned, encrypted off-site backup costs a few dollars a month — a fraction of managed backup services. The retention policies (a version per day for a week, per week for a month) are the grown-up controls that prevent both data loss and bill shock. Just remember the golden rule of backups: schedule a test restore quarterly. Duplicati makes restores reliable; your job is to verify that.

Features

Free and open source under the MIT license — no subscription, no backup-vendor lock-in, no readable-data trust required.
AES-256 client-side encryption means your cloud provider stores only ciphertext; privacy is architectural, not promised.
Huge backend list: S3, B2, Google Drive, OneDrive, SFTP, WebDAV, local disk — use the cheapest storage you can find.
Incremental, deduplicated, compressed backups with scheduling, versioning, and retention policies keep storage bills small.
The tray-app web UI exposes serious controls — filters, bandwidth throttling, pre/post scripts, email reports — without needing the command line.

Considerations

Being .NET-based, the initial backup scan of a large file set can be slow, and the web-UI-in-a-tray-app design confuses first-time users.
Restores are reliable but the interface makes them feel harder than they are — finding the right backup set and file version takes some clicking.
Documentation is community-maintained and uneven; troubleshooting obscure backend errors often means forum-diving.

About & Overview: Duplicati Backup for Windows PC

Duplicati is a free, open-source backup tool that encrypts your files locally and stores them on almost any backend — S3, Backblaze B2, Google Drive, OneDrive, SFTP, WebDAV, or plain local disk. Licensed under the MIT license and built on .NET, it runs a small web interface from your system tray where you configure backup jobs with scheduling, versioning, bandwidth limits, and email reports. Every backup is AES-256 encrypted and incrementally deduplicated before upload, so your cloud provider holds only ciphertext and you pay for changed blocks, not full re-uploads. For anyone who wants real off-site backups without trusting a backup vendor with readable data, Duplicati is the open-source answer that has been quietly protecting home servers and small offices for years.

How to Install & Verify Duplicati Backup for Windows PC

STEP 1

Download the installer

Download Duplicati from the official vendor link on this page.

STEP 2

Run the setup

Open the downloaded installer file and follow the on-screen installation steps.

STEP 3

Launch the app

Start Duplicati from the Start menu or desktop shortcut.

Duplicati Backup for Windows PC Version History & Build Numbers

Every Duplicati Backup for Windows PC build FileCobra has mirrored, newest first. Match the build number against the copy you already have to confirm whether you are up to date.

Duplicati Backup for Windows PC v2.4.0.1_stable_2026-10-07 Current Released 2026-10-07T13:08:30Z

                  104.43 MB • MSI Installer
                

Duplicati Backup for Windows PC v2.4.0.1 Released 2026-10-18

                  104.4 MB • MSI Installer
                

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Frequently Asked Questions & Verification Guide

Is Duplicati free?

Yes. Duplicati is free and open source under the MIT license. There are no paid tiers; you only pay whatever your chosen storage provider charges.

Are my files encrypted before upload?

Yes — encryption happens on your PC with AES-256 before anything is uploaded. Your storage provider only ever receives encrypted, deduplicated blocks, and only you hold the passphrase.

Which cloud providers does Duplicati support?

S3-compatible storage, Backblaze B2, Google Drive, OneDrive, Dropbox, SFTP/SSH, WebDAV, and local or network folders, among others. If a provider speaks a standard protocol, Duplicati can usually write to it.

How do I restore files from a backup?

Open Duplicati's web UI, pick the backup job, choose a date, browse the file tree, and restore to the original or a new location. Test this process before you need it — a backup you have never restored is a hope, not a plan.