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Fast, reliable image writing for Windows. Create bootable USB and SD cards from .img and .iso files with byte-level verification, clean logs, and safe device detection—built for Windows 11/10.

  • Write & verify images (optional SHA-256 check)
  • Read-back to file for backups and audits
  • Portable 64-bit build • no ads • no telemetry
  • Clear logs for troubleshooting and support
Download Latest Verify Checksum How it works →
Windows 11/10 (64-bit) ~12 MB installer Code-signed builds SHA-256 for every release
Win32 Disk Imager UI preparing to write an IMG file to a USB drive with verification enabled
Write once, verify always—trusted imaging for Raspberry Pi, SBCs, and bootable tools.

Key Features of Win32 Disk Imager

Write RAW Images

Quickly write raw disk images (.img, .iso, .bin) to USB drives or SD cards while preserving boot sectors and partition layout—ideal for Raspberry Pi, Steam Deck and firmware recovery tasks.

Read‑Back & Backup

Create byte‑perfect clones of removable media back into an image file. Save a snapshot before experimenting or archive a working card so you can restore it later in seconds.

Verify Image

After writing, the Verify pass re‑reads the device and compares every byte against the source file, catching hidden write errors from flaky cables or aging flash cells—before you try to boot.

Hashes on Demand

Built‑in calculator outputs SHA‑256, SHA‑1, or MD5 for both the original image and the written device, making it simple to share checksums or confirm a download’s authenticity.

Allocated‑Only Reads

Skip unused sectors during read‑back. Large 128 GB cards finish in minutes rather than hours—perfect when backing up an OS that only uses a few gigabytes.

Lightweight & Portable

No installer—just unzip and run. The 12 MB executable is digitally signed, leaves no registry traces, and is GPL‑2.0 open‑source so you can audit or modify the code.

Download Win32 Disk Imager

100% safe, clean, and trusted by professionals and hobbyists worldwide.
Version 1.0.0
File Size 12 MB
Platform Windows 11/10
Last Updated on August 11, 2025

Official Download

  • Digitally Signed Installer: Our installer is digitally signed for your protection. If prompted, verify the publisher is Win32 Disk Imager Project.
  • SHA-256 Checksum: a51c9fc75c9caa44df03502838f229a70d484963f54675c241799093a59d8874
    How to verify the checksum?
  • Need Linux or source code? See How-to guide

Before You Download

  • Administrator Rights Required: You must run as Administrator to write images.
  • All Data Will Be Erased: Writing to a device will erase its contents. Double-check your target drive!
  • Portable & Clean: No install needed. No telemetry. No ads.
  • Support: Get troubleshooting help
Download
GPL-2.0 Open Source • No adware • Trusted worldwide

Frequently Asked Questions

What does Win32 Disk Imager do?
Win32 Disk Imager writes raw disk images (.img, .iso, .bin) to USB drives and SD cards and can read them back to an image file for backup or cloning. It preserves boot sectors and partition layout for reliable, bootable media.
Will using it erase data on my USB/SD card?
Yes. Writing an image overwrites the target device. Double-check the drive letter before you proceed and back up anything important.
Do I need Administrator rights?
Yes. Low-level access to removable media requires Administrator privileges on Windows. Right-click the app and choose Run as administrator.
How do I verify the installer is safe and intact?
Verify the digital signature (Publisher: Win32 Disk Imager Project) and compare the file’s SHA-256 with the value on our site. See Verify Checksum guide for PowerShell and CLI steps.
What’s “Verify Image” and when should I use it?
After writing, Verify Image re-reads the device and compares every byte against the source file. Use it for mission-critical media or when using older USB sticks, SD cards, or adapters to catch hidden write errors.
Can it read back a card to an image for backup?
Yes. The Read operation creates a byte-perfect image of your device. Optionally enable Allocated-only to skip unused sectors and speed up large backups.
My drive isn’t listed or shows the wrong size—what should I do?
Safely re-insert the device, try a different USB port/reader, or reboot if another tool is locking the drive. For wrong sizes after imaging, use your OS’s disk manager to re-partition or re-format the device.
Why is the write speed slow?
Speed depends on media and reader. Use USB 3.x ports, high-quality SD cards (A2/UHS-I or better), and avoid hubs. Close antivirus scans for the duration of the write if they aggressively scan large files.
Does it support .ISO files?
Yes—Win32 Disk Imager can write many bootable .iso images when they are raw-writable. If a specific ISO expects special handling, use the vendor’s method or convert to a raw image as advised by the distribution.
Is Win32 Disk Imager portable and open source?
Yes. It’s a lightweight, portable utility (no installer required) and open source under GPL-2.0. You can audit or modify the code for your workflows.
Verification failed—what now?
Re-seat the device, try another cable/reader, and run Verify again. If failures repeat, re-download the source image and compare its SHA-256. Persistent errors often indicate a failing or counterfeit flash device.