Calculate an MD5 checksum
Hash a file with MD5 so you can compare it to the checksum a publisher printed next to the download.
What an MD5 checksum is for
Publishers often print an MD5 digest beside a download link so you can confirm the bytes you received match the bytes they shipped. Matching digests mean the file was not truncated or casually swapped in transit.
This page computes MD5 for a file you upload and shows the digest. You compare that string to the publisher’s published value character for character.
MD5 is not a password and not encryption. Anyone can hash the same file and get the same digest. It is a fingerprint for integrity checks, not a secrecy tool.
Cryptographers no longer recommend MD5 for collision-resistant security proofs. For everyday “did my ISO download finish” checks against a vendor page, MD5 remains widely posted and useful.
How to verify a download with MD5
Download the file from the publisher. Upload that same file here. Copy the MD5 this page shows.
Compare it to the MD5 on the publisher’s site. Every character must match. A single difference means a different file or a bad transfer.
If they do not match, download again from the official source. Do not run an installer that fails the published digest.
Name local copies clearly so you hash the file you think you hashed.
- Upload the downloaded file.
- Copy the MD5 digest.
- Compare to the publisher’s posted value.
When MD5 matches and when it does not
A match means the bytes are the same as the digest’s input. It does not mean the software is safe—only that it matches what the digest author hashed.
A mismatch means corruption, a partial download, or a different build than the page describes. Re-fetch before you proceed.
Unix and Windows line-ending changes in text files change MD5. Binary installers should not change if the transfer is clean.
Some vendors post multiple digests for different archives. Hash the exact archive name they labeled.
MD5 versus stronger hashes
SHA-256 and SHA-512 are stronger against deliberate collision attacks. Prefer them when a vendor posts both and your threat model includes attackers.
Many older mirrors still only post MD5. Use what they publish rather than inventing a SHA value they never provided.
This site also offers broader hash tools when you need algorithms beyond MD5.
Do not truncate digests when comparing. Partial matches are not matches.
Safety habits
Only trust digests posted on the same official HTTPS page as the download when you can.
A digest copied from a random forum can be as malicious as a bad file.
Hashing does not scan for viruses. Use your antivirus as a separate step on executables.
Do not upload secrets you cannot process in a browser tool under your policy.
After you have the digest
Record the MD5 next to the filename in your install notes when audits matter.
Prepared server copies expire. Your local file remains the one that matters.
If you re-encode or zip the file, the MD5 changes—hash the exact artifact you will ship.
Free limits apply per upload.
What MD5 cannot prove
It cannot prove the publisher is honest—only that your bytes match their posted digest.
It cannot prove absence of malware in a matching malicious build.
It cannot repair a corrupt download.
It cannot replace code signing checks for software that uses signatures.
Take a minute after the file lands to open it once. Confirming early is cheaper than discovering a bad transfer when you are already away from the network. On the md5 checksum page, that habit protects the exact file you came here to create.
Name files with a human subject and a date. Default download names collide, and cleanup tools delete keepers that look like temporary junk. On the md5 checksum page, that habit protects the exact file you came here to create.
Prepared files on the worker expire on a short timer. The lasting copy is the one your browser wrote into your downloads folder. On the md5 checksum page, that habit protects the exact file you came here to create.
Free use covers ordinary daily jobs with published size and count ceilings. Pro raises those ceilings and removes advertising when your volume needs it. On the md5 checksum page, that habit protects the exact file you came here to create.
If a step fails, reproduce the same address or upload in a normal browser first. When the source itself will not play or open, this page will not invent a working file. On the md5 checksum page, that habit protects the exact file you came here to create.
Keep this tab open until the browser finishes writing. Closing early is a common way to create a short file that looks complete until you open it. On the md5 checksum page, that habit protects the exact file you came here to create.
Vidzilla focuses on one job at a time: one URL or one upload. Bulk crawlers and account takeovers are out of scope on these tool pages. On the md5 checksum page, that habit protects the exact file you came here to create.
When you need a different format later, convert from the local file you already trust instead of re-fetching a page that may change or disappear. On the md5 checksum page, that habit protects the exact file you came here to create.
Questions about MD5 checksums
Is MD5 encryption?
No. It is a fingerprint. Anyone can compute the same digest for the same file.
What if my MD5 does not match?
Re-download from the official source. Do not install a mismatched binary.
Is MD5 still safe?
It is fine for casual integrity checks. Prefer SHA-256 when the vendor posts it and threats include attackers.
Do I need an account?
No. Upload and read the digest within free limits.
Can I hash a whole folder?
Hash files individually, or hash a ZIP of the folder if that is the published artifact.
Why did a text file’s MD5 change?
Line endings or encoding changes alter bytes. Binary installers should be bit-identical.