MD5 / SHA-1 / SHA-256 / SHA-512 of a string or a file, in one click.
The everyday operating tools of a one-to-five-person business: shrink a product photo for the marketplace, generate a QR code for the storefront, check the exchange rate before quoting a customer, generate UUIDs for an import, summarize a competitor blog post, count the words on a product description. Cheap, fast, and your inventory photos never leave your device.
What it does for Small business owners and solo operators
Generates MD5, SHA-1, SHA-256 and SHA-512 from the same input. The hashes are computed in the browser - the file never leaves.
Useful for verifying a downloaded asset before you share it (compare with the publisher's published hash), or for generating content fingerprints for a small DB.
For larger files (over a few MB) the tool chunks them through a stream to avoid blowing up memory.
How to use it
Paste the text or drop the file in. Switch algorithms with one click if you picked the wrong one.
Wait for the result - SHA-512 on a large file is a perceptible wait, but it does not upload anywhere.
Copy the hash. The page shows all four algorithms side by side, so you can compare against any source.
SHA-256 is the sensible default. MD5 and SHA-1 are good enough to catch an accidental corruption, but not to protect against a deliberately altered file - if a vendor publishes SHA-1 only, that is worth questioning.
Can I check a supplier file without uploading it?
Yes, and that is the point: the hashing runs in your browser, so a multi-gigabyte file never leaves your machine. You only compare the short hash string with the one the sender published.
Why do two files with the same name produce different hashes?
A hash describes the contents, not the filename. One changed byte - a re-save, a line ending, an added comment - produces a completely different hash.