Cryptographic Hash & Checksum Generator

Compute cryptographic message digests and file checksums directly in your browser using hardware-accelerated Web Crypto API. Verify file integrity and match checksums with 100% privacy.

Your files are processed 100% locally in your browser. Nothing is ever uploaded to any server.

Input Text String

13 chars•13 bytes

Enable HMAC (Keyed-Hash Message Authentication)

Output Format:

How to use this tool

1Step 1

Choose Text Hash or File Checksum mode.

2Step 2

Enter or paste your text, or drop a file from your device.

3Step 3

Optionally enable HMAC with a secret key or paste an expected checksum to verify matching.

4Step 4

Copy the calculated hex or Base64 hash with one click.

Frequently asked questions

Are files uploaded to a server to compute checksums?

No. All hashing is performed directly in your browser using the HTML5 File API and Web Crypto. Your files never leave your computer.

Which hash algorithm should I use?

SHA-256 is the current industry standard for cryptographic integrity and security. SHA-512 is recommended for higher security margins, while MD5 and SHA-1 are provided for legacy checksum verification.

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