TEXT & DEVELOPER TOOLS
SHA-256 Hash Generator
Calculate the SHA-256 hash of text or a file and check it against a published checksum.
Quick answer: Paste text or choose a file, run SHA-256, then paste the expected hash into the compare box to see whether it matches.
Use SHA-256 Hash Generator ↓Loading the tool…
How to use SHA-256 Hash Generator
- Provide text or a fileType or paste text, or use the file box for a download or document. The file stays on your device.
- Run SHA-256The operation is already set to SHA-256. The result is 64 hexadecimal characters.
- Compare with the expected valuePaste the checksum published by the software vendor. The tool reports whether it matches.
- Copy the resultUse uppercase hex if the other system expects it, then copy or download the hash.
About this tool
SHA-256 is the checksum most download pages publish, and the one most security and engineering tools expect. If the hash of the file you downloaded matches the vendor’s published value, the file arrived complete and unmodified. This page computes it in your browser without uploading anything.
Practical example: Choose a downloaded installer, run SHA-256, paste the hash from the vendor’s page, and confirm that it says the hash matches.
Important limitation: A hash shows that two files are identical, not that either is safe. It is only as trustworthy as the source of the published value.
Hashing runs in this browser tab using the browser’s built-in cryptography. Nothing is uploaded. Read the privacy information.
How it works
The browser’s Web Crypto API computes the SHA-256 digest of the bytes of your text or file and the tool prints it as hexadecimal.
Real-world uses
- Verifying software downloads
- Checking that a backup copy matches the original
- Generating fingerprints for data and configuration
Using SHA-256 checksums properly
A SHA-256 hash is a 256-bit fingerprint, written as 64 hexadecimal characters. The same input always produces the same hash, and changing even one bit produces a completely different one. That makes it ideal for checking integrity: you compare the hash of what you have with the hash the publisher announced.
A matching hash proves the file is identical to the one hashed by the publisher, but only if you obtained the published hash from a trustworthy place. If an attacker can alter both the download and the hash on the same page, the comparison proves nothing. For important software, prefer hashes published over a separate channel, or digital signatures.
Hash the file itself, not text copied from it. Opening a file in an editor and pasting its content into a text box can change line endings and encodings, giving a different hash. Use the file chooser for files, and the text box only for text. A trailing newline or space will change the result, which is the most common reason a text hash does not match.
SHA-256 is not a password storage scheme. Plain, fast hashes can be tried billions of times a second, so passwords need slow, salted algorithms such as bcrypt, scrypt or Argon2. For signing messages between systems, use HMAC with a secret key, which this toolkit also offers.
Tips for better results
- Use the file chooser for files.
- Watch for trailing newlines in text.
- Get the expected hash from the publisher’s official page.
Frequently asked questions
How do I verify a download with SHA-256?
Choose the file, run SHA-256, paste the published hash into the compare box and check for a match. A mismatch means the file differs, so download it again from the official source.
Why does my text hash not match another tool?
Usually a different character encoding, line ending or an extra trailing space or newline. Make sure both hash exactly the same bytes.
Is SHA-256 reversible?
No. It cannot be reversed to recover the input, although short or common inputs can be found by guessing.
Is the file uploaded?
No. Hashing runs in this browser tab.