SHA-256 Hash Generator — Free Online, No Signup

SHA-256 Hash Generator

Generate SHA-256, SHA-384, SHA-512, and SHA-1 hashes for text or files instantly — then verify checksums with compare mode. Everything runs in your browser.

Generate a hash

Results appear live. Switch tabs or algorithms any time.

SHA-256
Algorithm
0
Hash characters
0
Input bytes

Compare mode — verify a checksum

Paste the expected hash (for example from a software download page) to check whether it matches.

100% private

Hashing uses your browser’s built-in Web Crypto engine. Your text and files never leave your device — nothing is uploaded anywhere.

No signup

Hash as much text and as many files as you like, instantly — no account, no limits.

Free forever

Four real algorithms, file hashing, checksum compare mode, and copy/download — all free, always.

How to use

  1. 1
    Pick text or file

    Use the Text tab to hash something you type, or the File tab to drop a file — an installer, a document, anything.

  2. 2
    Choose an algorithm

    SHA-256 is the standard choice. Pick SHA-512 for a stronger digest, SHA-384 for a middle ground, or SHA-1 only for legacy checksums.

  3. 3
    Copy the result

    The hexadecimal hash appears live. Use Copy hash for the clipboard or Download hash to save it as a .txt file.

  4. 4
    Verify a checksum

    Paste the hash the publisher provided into compare mode and hit Verify match — the tool tells you instantly whether they are identical.

Features

Text and file hashing

Hash typed text with UTF-8 encoding, or drop any file — the tool reads the full file bytes, not just the name.

Four real algorithms

SHA-256, SHA-384, SHA-512, and SHA-1 via the browser’s native Web Crypto API — fast and standards-correct.

Checksum compare mode

Paste an expected hash and get an instant green match or red mismatch verdict — ideal for verifying downloads.

One-click copy and download

Copy the hex digest to your clipboard or save it as a .txt file for your records.

Live digest stats

See the algorithm, hash length, and input byte count at a glance as you work.

Drag and drop files

Drop a file onto the dropzone or click to browse — no size limits imposed by the tool itself.

Frequently asked questions

What is SHA-256?
SHA-256 is a cryptographic hash function that turns any input into a fixed 64-character hexadecimal fingerprint. Change even one byte of the input and the fingerprint changes completely. It is widely used to verify file integrity, sign software releases, and secure blockchain transactions.
Can a hash be reversed to get the original text?
No. Hash functions are one-way: there is no math that turns a SHA-256 digest back into the input. The only way to “guess” the input is brute force — trying candidate inputs until one produces the same hash — which is infeasible for anything but short, predictable text.
Which algorithm should I use — SHA-256, SHA-512, or SHA-1?
SHA-256 is the default for checksums and general use. SHA-512 produces a longer 128-character digest and is faster on 64-bit systems; SHA-384 is its shorter sibling. SHA-1 is considered weak (collisions have been demonstrated) — use it only when a publisher lists a legacy SHA-1 checksum you need to match.
Why do two “identical” files give different hashes?
The hash covers every byte, so invisible differences matter: Windows vs. Unix line endings, a trailing newline, a byte-order mark, or metadata saved inside the file. If a download’s checksum does not match, re-download — a mismatch means the file changed in transit, or the source itself was altered.
Why is there no MD5 option?
MD5 is cryptographically broken — practical collisions exist, so it cannot be trusted for security. Browsers also do not ship MD5 in the Web Crypto API, so this tool sticks to the SHA family, which is what modern checksums use.
How do I verify a downloaded program’s checksum?
Copy the SHA-256 hash published on the official download page, hash the file you downloaded here using the File tab, then paste the published hash into compare mode and hit Verify match. A match means the file arrived intact and unmodified.
Is my file uploaded to your server?
No. Your browser reads the file and hashes it locally with the Web Crypto API. Nothing leaves your device, which is also why there is no file size limit from us — only your device’s memory matters.
Is this tool really free?
Yes — free and unlimited, with no signup. Hashing runs entirely in your browser, so there is nothing to pay for.

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