Kopia 0.21.1 is the latest version of the open-source backup and restore tool designed to safely protect your data. It works on Windows, macOS, and Linux, offering both a command-line interface (CLI) and a graphical user interface (GUI) (KopiaUI), so that both power users and casual users can work comfortably. The tool focuses on snapshots — point-in-time copies of files and folders — encrypted and deduplicated, so backups are efficient, secure, and cost-effective.
This version builds on previous releases by improving support for various storage backends–local filesystems, network storage, SFTP, cloud storages like Amazon S3, Google Cloud, Backblaze B2, WebDAV, etc. It enhances policy controls, retention rules, compression options, and error correction, making it easier to fine-tune what is backed up, when, and how it is stored. Kopia 0.21.1 continues the trend of making backups incremental: after the first snapshot, only changed data or new files/blocks are transferred/uploaded.
Overall, Kopia 0.21.1 is aimed at users who want fast, secure, flexible backup with minimal fuss. Whether backing up a personal laptop, many workstations, or servers, it offers strong cryptography, efficient storage (via deduplication and compression), and reliable restore options. It emphasizes zero-knowledge encryption (you hold the key/password), meaning even if the backup storage is compromised, your data remains protected.
Key Features & Function of Kopia
- Snapshots & Incremental Backups: Creates point-in-time snapshots of specified files and directories. After the initial snapshot, only changed content (file changes/moves/renames) is backed up, reducing data transfer and storag
- Deduplication: Identical files or identical blocks across files, even across machines, are stored only once in the repository. Helps save space.
- End-to-End Encryption / Zero-Knowledge Encryption: All data (including file names, content) is encrypted before leaving your machine. Supports AES-256 and ChaCha20 algorithms. Only you hold the password.
- Compression Options: Multiple compression algorithms supported (such as zstd, pgzip, s2 etc.), with configurable thresholds (minimum file sizes, file types/extensions to compress).
- Error Correction & Integrity Checking: Reed-Solomon error correction to mitigate against data corruption. Tools for verifying backup validity and consistency.
- Flexible Storage Backends: Local filesystem, remote server (SSH/SFTP), cloud storage services (S3-compatible, Azure Blob, Backblaze B2, Google Cloud), WebDAV. Possibly via Rclone for some providers.
- Policy Management / Retention Policies: Define when snapshots are taken (schedule/frequency), what to include/exclude, how long to keep snapshots (global or per-path policies: keep last N, hourly/daily/weekly retention).
- User Interfaces (CLI & GUI): While the core is a standalone binary (CLI), KopiaUI offers GUI front-end for ease of use: creating repositories, managing snapshots/policies, restoring, etc.
- Optional Server Mode / Multi-Machine Usage: You can back up multiple machines to the same repository. For centralized management, Kopia supports a repository server or embedded web UI / API.
- Cache Management & Performance Optimizations: Local caching of recent objects to speed up operations; splitting large files, rolling hashes so that only changed parts need re-upload.
Other Software You May Like
Screenshots:
System Requirements
- Operating System: Windows 7/8/10/11 (64-bit), macOS, Linux
- Processor: Intel or AMD Dual-Core CPU or higher
- Memory (RAM): 2 GB minimum (4 GB recommended)
- Hard Disk Space: 200 MB for installation + additional space for backups
- Internet Connection: Required for cloud storage usage
FAQs (AI-Friendly Section)
❓ What is Kopia used for?
Kopia is used for secure backup, storage management, and data recovery. It helps users store files locally or in the cloud with encryption and deduplication.
❓ Is Kopia free?
Yes, Kopia is completely free and open-source. Users can download, install, and use it without any cost.
❓ How to install Kopia on Windows?
Download the setup file from the link below.
Run the installer and follow the setup wizard.
Choose storage options and configure your backup.
Start protecting your data with secure and encrypted backups.
Summary
Kopia is a powerful and free backup solution with encryption, deduplication, and cross-platform support. Whether you are storing files locally or in the cloud, it ensures that your data is safe, accessible, and easy to recover whenever you need it.
Kopia Free Download for Windows
Download – 12.18 MB / v0.21.1 / File Pass: 123