IPSW Checksum & Hash Verifier Beta

Verify the integrity and completeness of your downloaded Apple firmware files before flashing to avoid restore errors and bootloops.

Drop your .ipsw file here, or browse

Supports large .ipsw files. Processes locally using memory-safe streaming without uploading to any server.
About Checksum Verification
100% Private & Local

Your files never leave your device. Checksums are calculated locally in your browser with zero server uploads.

Memory-Safe Streaming

Streams data directly from local storage with minimal RAM usage (<10MB), keeping your browser light and responsive.

Prevents Restore Errors

Helps avoid iTunes Error 14 and Error 13 by confirming your downloaded .ipsw file is complete before flashing.

Why Verifying Firmware Integrity Matters

When downloading multi-gigabyte IPSW files, network interruptions can silently corrupt the archive. If a damaged firmware file is used during restore, flashing may fail mid-process and leave your device stuck in recovery mode.

iTunes Error 14 (Corrupted Firmware) Commonly triggered when flashing an incomplete or corrupted IPSW file. iTunes Error 13 (Firmware Image Error) Occurs when iTunes fails to unpack or verify internal firmware components.
Frequently Asked Questions

How does the in-browser IPSW verifier work?

The tool reads your downloaded .ipsw file directly from your local drive using browser file streaming. It calculates the SHA-256 checksum locally on your computer without uploading any file data to external servers.

Will checking an IPSW file consume my internet data or slow down my browser?

No. The verification uses zero internet bandwidth and streams data in memory-safe buffers (<10MB RAM usage) via background processing.

How do I find the official SHA-256 for my device?

When selecting any firmware on dotIPSW, the official SHA-256 checksum is provided directly in the download dialog with a 1-click copy button.

What should I do if my checksum doesn't match?

Do not attempt to restore your iPhone or iPad with a mismatched file. Delete the damaged file and download a fresh copy from dotIPSW.