When to use a file hash calculator
This tool calculates a hash digest for a local file. It is useful for verifying software installers, checking archive integrity, confirming downloaded ISO images, comparing build artifacts, and validating delivered files. Whether you need MD5, SHA-256, or another digest, you can finish the check entirely in your browser.
Common file verification scenarios
- After downloading a software installer, compare the computed MD5 or SHA-256 value with the value published by the vendor.
- Verify ZIP, 7z, tar.gz, and other archive files after transfer, sharing, or backup.
- Generate digests for ISO images, database backups, log archives, and other large files so you can record and review them later.
How to calculate a file MD5 or SHA-256 online
- Choose a local file or drag it into the drop zone.
- Confirm the digest algorithm you want to use. SHA-256 is selected by default.
- Click Start hashing and wait until the progress reaches 100%.
- Copy the result for download verification, checklist comparison, or automation.
How to tell whether verification passed
- The digest shown on this page must match the value from the vendor site, release page, or checksum manifest exactly.
- Even a one-character difference means the file content is different.
- If the other party publishes SHA-256, MD5, or another specific algorithm, make sure you selected that exact algorithm before comparing.
- Confirm that you are comparing the same file version. A matching filename does not guarantee identical content.
- Interrupted downloads, transfer corruption, repackaging, or comparing extracted files instead of the original archive can all change the digest.
- If the published digest includes spaces, grouping, or uppercase formatting, normalize the format before comparing. Manual checks usually ignore case, but scripts should stay consistent.
FAQ
Will my file be uploaded to the server?
No. The file is read and hashed only in your current browser. The site does not receive your file contents.
Why is SHA-256 the default?
SHA-256 is the safer default for modern integrity checks. MD5 and SHA-1 are mainly kept for compatibility with older workflows.
If the digest matches, does that prove the file is safe?
Not by itself. A matching digest only shows that the file matches the value you compared against. You should still consider the download source, signatures, and release channel.
Why do I need to click Start again after switching algorithms?
This avoids accidentally recalculating large files. Once the algorithm changes, the previous digest is no longer valid, so you need to start a fresh calculation.
Related tools
If you also need to hash short text or generate keyed digests, these related tools are the closest match:
- Hash Generator：Generate MD5, SHA, SHA-3, and RIPEMD160 hashes
- HMAC Generator：Generate HMAC values with MD5, SHA, SHA-3, and RIPEMD160