SHA-256 Hash Generator
Free SHA-256 hash generator and SHA256 checksum tool: hash text or any file, copy the 64-character digest and check it against a published value.
How to use SHA-256 Hash Generator
- 1Type or paste text, or press “Hash a file” to hash a file’s bytes.
- 2Copy the 64-character SHA-256 from the first row.
- 3Paste the checksum from the publisher into “Compare with” to verify it.
What makes it better
- SHA-256 shown first as a large digest with a primary Copy button
- Hashes files of any size in chunks, with progress and cancel
- HMAC-SHA-256 with your own key for webhook and API signature checks
- Hex, Base64 or URL-safe Base64, with an uppercase hex option
- SHA-512, SHA-3 and others sit behind “More algorithms”
About SHA-256 Hash Generator
SHA-256 Hash Generator calculates the SHA-256 digest of your text or file and shows it as 64 hexadecimal characters. Text updates as you type, while files are read in chunks on your device with a progress bar. SHA-256 is the usual choice for verifying downloads, signing payloads with HMAC and many blockchain and TLS uses.
Common uses
- Verify an installer, ISO or package against the SHA-256 listed on the vendor’s page.
- Debug an HMAC-SHA-256 signature that a payment or webhook provider rejects.
- Produce a content hash for cache busting, subresource integrity or de-duplication.
- Inspect how Bitcoin-style double hashing starts by hashing a short string once.
Example
Input
abc
Result
ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad
Good to know
- SHA-256 has no known practical collision or preimage attack, which is why it is trusted for file integrity and signatures. Even so, a plain fast hash is the wrong tool for storing passwords; use Argon2, scrypt or bcrypt.
- The digest is 256 bits, always 64 hex characters, whatever the input size. If a published checksum has another length it is a different algorithm.
- Text is hashed as UTF-8. A different line ending or a trailing space changes the whole hash, so compare identical bytes.
SHA-256 Hash Generator FAQ
What is a SHA-256 hash?
SHA-256 belongs to the SHA-2 family and condenses any input to a 256-bit fingerprint, written as 64 hex characters. Equal inputs always give equal hashes, and the smallest change produces an unrelated result.
How do I generate a SHA-256 checksum for a file online?
Press “Hash a file”, pick the file and wait for the progress bar. The SHA-256 appears in the first row without the file leaving your device. Paste the vendor’s checksum into “Compare with” to confirm.
Where is SHA-256 used in practice?
It signs TLS certificates, checks software downloads, underpins Git’s newer object format option, and drives Bitcoin’s proof of work and addresses. HMAC-SHA-256 authenticates many API requests.
Can SHA-256 be decrypted?
No, because a hash is not encryption and holds no recoverable copy of the input. People only “reverse” it by guessing inputs, which works on short or common strings, so add a salt and a slow function for passwords.
Is SHA-256 the same as SHA3-256?
No. They are different algorithms with different internals and different results for the same input, though both give 64 hex characters. Open “More algorithms” to see SHA3-256 beside it.