100% free No quotas No telemetry

OmniBackup

A complete backup & cloning solution for Windows. File, folder, and full-disk protection with strong encryption, smart scheduling, and recovery media — built on top of standard, well-documented OS facilities.

Four pillars
01

Free forever

No locked features, watermarks, or trial expirations.

02

No quotas

Your disks, your cloud accounts, your limits.

03

Open standards

ZIP archives, AES-256, VHD images — no proprietary lock-in.

04

No telemetry

Backups stay on your machine and on storage you control.

Backup engine

File & folder backup

Full, incremental, and differential backups with SHA-256 change detection.

Disk imaging

Sector-level images and DISM-based .wim. Restore to identical or new hardware.

Disk cloning

Direct source-to-target copy with size validation. Migrate to a new drive.

Hot backup (VSS)

Locked or in-use files are captured via Volume Shadow Copy.

Chunked dedup

Content-addressable storage with GC. Backups shrink as duplicates collapse.

Multi-volume split

Split archives into .part001 chunks for DVD / USB transport.

Security & recovery

AES-256 encryption

PBKDF2 key derivation, integrated into the archive. Passwords never written to disk.

DPAPI-protected secrets

Cached credentials are sealed to the current Windows user.

BitLocker aware

Detects encrypted volumes and unlocks them when permitted.

WinPE recovery media

Build a bootable USB / ISO to restore when Windows can’t start.

Smart scheduler

Daily / weekly / hourly schedules plus an idle-detector for low-impact runs.

Retention policies

KeepLastN, daily / weekly / monthly grandfathering. Old sets pruned automatically.

Downloads

Builds are signed where supported but we cannot guarantee they will pass every antivirus heuristic. Verify the SHA-256 below where shown.

The promise

Backups must be portable, inspectable, and restorable without the original tool. Archives are ZIPs. Disk images are VHDs. If this project ever stops being maintained, you keep your data and can open it with industry-standard tooling.

Important — please read before using OmniBackup

OmniBackup is provided AS-IS, WITHOUT ANY WARRANTY of any kind, express or implied. It is offered free of charge as an evolving project. By downloading, installing, or otherwise using OmniBackup, you accept the terms below and agree that we, the authors and operators of this site, bear no responsibility for any outcome of your use of it.

Full liability disclaimer (click to expand)

1. No warranty

OmniBackup is distributed without warranty of merchantability, fitness for a particular purpose, non-infringement, accuracy, completeness, or uninterrupted operation. We do not guarantee that OmniBackup will be error-free, secure, free of viruses or other harmful components, or compatible with your operating system, hardware, drivers, antivirus, or other software.

2. Bugs, defects, and unintended behaviour are expected

Software contains bugs. OmniBackup may, despite our best efforts:

  • contain coding errors, logic mistakes, race conditions, memory leaks, or undocumented edge cases;
  • misbehave on operating-system versions, locales, hardware, or peripherals we have not tested;
  • regress between versions or fail to upgrade cleanly;
  • display incorrect, outdated, or incomplete information in its UI;
  • be flagged by antivirus or smart-screen heuristics as a false positive;
  • conflict with other installed software or system policies.

3. Data loss, corruption, and backup integrity — your responsibility

OmniBackup interacts with files, archives, drives, or system state. Backup, restore, snapshot, sync, and imaging operations carry inherent risk of total data loss, corruption, or partial write. Power failure, antivirus interference, OS update, hardware failure, file-locking conflicts, network interruption, encryption-key loss, or a software bug can render data unrecoverable. You agree that:

  • you have already secured an independent, verified backup of any data you allow OmniBackup to touch;
  • you accept all risk of data loss, corruption, partial restore, or backup chain breakage;
  • you are responsible for verifying that backups can actually be restored — we make no promise that they can.

4. Third-party services, APIs, and content

OmniBackup may interact with third-party services, APIs, app stores, or content providers. Those services have their own terms, privacy policies, fees, region locks, quotas, and availability windows that we do not control and that may change at any time. We are not responsible for any cost, charge, ban, throttle, account suspension, data breach, or service disruption arising from your use of those third parties through OmniBackup.

5. Browser extensions, system permissions, and elevated access

Where OmniBackup ships as a browser extension, an installed application, or a portable executable, it may request permissions, system access, or administrator rights to perform its function. You are responsible for reviewing the requested permissions before granting them and for the consequences — security, privacy, stability — of granting them.

6. No professional advice

Nothing returned by OmniBackup constitutes medical, legal, financial, tax, safety, dietary, security, regulatory, engineering, or other professional advice. Do not rely on OmniBackup's output for any decision where an incorrect outcome could cause harm, loss, or liability. Always consult a qualified human professional.

7. Limitation of liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL WE, THE AUTHORS, OPERATORS, MAINTAINERS, CONTRIBUTORS, AFFILIATES, OR DOWNSTREAM REDISTRIBUTORS OF OmniBackup BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY, OR PUNITIVE DAMAGES — including, without limitation, lost data, lost backups, lost profits, lost revenue, lost goodwill, business interruption, cost of substitute services, hardware damage, downtime, regulatory fines, third-party claims, or any other loss — arising out of or in connection with your installation, use, inability to use, removal, or update of OmniBackup, even if we have been advised of the possibility of such damage and even if a stated remedy is found to have failed of its essential purpose.

Where the law does not permit such broad disclaimer, our aggregate liability shall not exceed the greater of (a) the amount, if any, you paid us for OmniBackup in the twelve months preceding the event giving rise to the claim (which, for a free project, is zero) or (b) ten United States dollars (USD $10).

8. Indemnification

You agree to defend, indemnify, and hold us harmless from any claim, demand, action, liability, cost, or expense (including reasonable attorneys' fees) arising out of or relating to your use of OmniBackup, your breach of these terms, your violation of any law, or your infringement of any third-party right in connection with your use of OmniBackup.

9. Updates, breaking changes, and end-of-life

OmniBackup is under active development. Any version may be amended, replaced, broken, or permanently discontinued at any time, with or without notice. File formats, settings, command-line flags, UI layouts, API contracts, and behaviour can and will change. We do not promise backward compatibility, an upgrade path, or continued availability.

10. Acceptance

By downloading, installing, running, embedding, redistributing, or otherwise using OmniBackup, you confirm that you have read, understood, and agreed to this disclaimer in full. If you do not agree, do not use OmniBackup.

This disclaimer is supplemented by the Site's Terms of Service, Privacy Policy, and general Disclaimer. To the extent of any conflict, the more restrictive term controls with respect to your use of OmniBackup.

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