SHA256 Hash Generator

Generate SHA-256 cryptographic hashes for text and files. Verify data integrity with secure 256-bit hashing.

Uppercase

Text Input

SHA-256 Hash

Hash will appear here

Hash a File

Drag & drop a file here or

Choose File

Compare Two Hashes

Hash A

Hash B

Cryptographic SHA-256 Hashing

SHA-256 produces a unique 64-character hexadecimal fingerprint for any data. Used by Bitcoin, SSL certificates, and countless security protocols, it's the gold standard for data integrity verification.

256-bit Security

Why Use SHA-256?

Industry Standard

Used in Bitcoin, TLS/SSL, and approved by NIST for government use.

File Verification

Verify downloaded files haven't been tampered with by comparing checksums.

Hash Comparison

Built-in tool to compare two hashes and verify they match exactly.

Client-Side Only

100% browser-based. Your files and text never leave your device.

How this SHA256 Hash Generator works

This cryptographic tool generates SHA-256 hashes for text input and files using the Web Crypto API, producing 256-bit (64-character hexadecimal) digests. SHA-256 belongs to the SHA-2 family designed by the NSA and is the backbone of Bitcoin, TLS certificates, and countless security protocols. The algorithm processes data through 64 rounds of compression, producing collision-resistant fingerprints.

Text input hashes in real-time as you type, with immediate visual feedback showing the 64-character result. File hashing supports drag-and-drop, reading file contents into ArrayBuffer for cryptographic processing. The hash comparison tool verifies two hashes match exactly, useful for validating download integrity against publisher-provided checksums.

Case toggle switches between uppercase and lowercase output formats. Copy-to-clipboard provides instant hash sharing. All processing executes entirely in your browser via native WebCrypto—your data never leaves your device. Common applications include file verification, password hashing references, blockchain development, and data integrity checks.

How to Use

Enter Text or Upload File

Type text or drag & drop a file to hash.

Get SHA-256 Hash

The 256-bit cryptographic hash is generated instantly.

Copy or Compare

Copy the hash or use the comparison tool to verify integrity.

Example Usage

SHA-256 hash of "hello":

Input

hello

Output

2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824

Frequently Asked Questions

What is SHA-256?

SHA-256 (Secure Hash Algorithm 256-bit) is a cryptographic hash function that generates a fixed-size 256-bit (32-byte) hash from any input data. It's part of the SHA-2 family designed by the NSA.

What is SHA-256 used for?

SHA-256 is widely used for data integrity verification, digital signatures, password hashing, blockchain (Bitcoin uses it), SSL certificates, and file checksum validation.

Is SHA-256 secure?

Yes, SHA-256 is considered cryptographically secure. No practical collision attacks have been found. It's approved by NIST and used in government and financial applications.

Is my data safe?

Absolutely! All hashing happens in your browser using the Web Crypto API. Your data never leaves your device or gets sent to any server.

Can SHA-256 be reversed?

No, SHA-256 is a one-way hash function. It's computationally infeasible to reverse the hash back to the original input.

Related Tools

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes for any text and optionally compare two hashes.

SHA2 Hash Generator

Generate SHA-2 family hashes (SHA-224, SHA-256, SHA-384, SHA-512) for any text input.

MD5 Hash Generator

Generate MD5 hash checksums for text. Common for file verification.

Checksum Calculator

Calculate and compare file checksums using MD5, SHA-1, SHA-256, and more.

The SHA256 Hash Generator is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.