Web Toolarium

FILE CHECKSUM

File Hash & Checksum Checker

Calculate or verify MD5, SHA, and CRC32 values, then compare the contents of two files in your browser.

01 / HASH

Calculate a file hash

Select a file to automatically calculate each selected hash algorithm.

Drop a file here

or

Algorithms

HOW TO USE

How to use the three tools

01

Calculate a hash

Choose a file and the algorithms to calculate. Copy the results or save them in a TXT file.

02

Verify a checksum

Choose a file and paste the checksum from its publisher. You can change the automatically detected algorithm.

03

Compare files

Choose two files to compare them with SHA-256. Reset the comparison before selecting different files.

ABOUT HASHES

About hashes and file comparison

What is a hash or checksum?

A fixed-length value calculated from file contents. Comparing it with the publisher’s value helps verify file integrity.

MD5 and SHA-1

Collision attacks are known for these algorithms. Avoid them when security matters.

SHA-256, SHA-384, and SHA-512

These are members of the SHA-2 family. SHA-256 or later is generally suitable for checking published file hashes.

CRC32

A 32-bit value used to detect accidental data corruption. It is not suitable for cryptographic security.

Comparing two files

Each file is read in chunks and hashed with SHA-256. The tool compares their sizes and hashes.

Privacy

Selected files are not sent to a server or external API. Processing stays in your browser, and results are not retained after you close the page.