Cryptographic Hash & Checksum Generator
CryptoWebAPIGenerate SHA-256, SHA-512, SHA-1, MD5, and HMAC hashes locally using Web Crypto API.
Calculated Cryptographic Digests (Hardware Accelerated)
About Cryptographic Hash & Checksum Generator
A cryptographic hash function is a mathematical algorithm that maps data of arbitrary size to a bit array of a fixed size (a digest). Hashes are one-way functions designed to be irreversible, collision-resistant, and deterministic, widely used for data integrity, checksum verification, and password storage.
Zero-Upload Privacy Guarantee
Hashing files or passwords on a remote server requires uploading that data. DevTools calculates hashes directly on your computer's CPU using the W3C Web Cryptography API (`window.crypto.subtle`).
Key Capabilities & Features
How to use this SHA256 hash generator
Choose Text or File Mode
Enter text directly or drag-and-drop any local file to compute its checksum without uploading.
Toggle HMAC (Optional)
Enable HMAC and enter a secret key if you need keyed-hash message authentication.
Review Hashes
View instant hashes generated across all major algorithms (SHA-256, SHA-512, SHA-384, SHA-1, MD5).
Copy Desired Format
Copy lowercase hex, uppercase hex, or Base64 digests with a single click.
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