Hash Calculator – MD5, SHA-1, SHA-256, SHA-512

Calculate cryptographic hashes of text or files. Supports MD5, SHA-1, SHA-256, and SHA-512. 100% browser-based, your data never leaves your device.

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Features

🔐

Multiple Algorithms

Calculate MD5, SHA-1, SHA-256, and SHA-512 hashes simultaneously from a single input.

📝

Text Input

Type or paste text to generate hashes. Perfect for verifying text integrity.

📁

File Upload

Upload any file to calculate its hash. Great for verifying downloads.

🔒

Privacy First

Uses Web Crypto API (and spark-md5 for MD5) locally. Your data never leaves your browser.

📋

Copy Individual Hashes

Click to copy any specific hash result to your clipboard.

📊

Upper/Lowercase

Toggle between uppercase and lowercase hex output for each hash.

How to Use

1

Choose Input Method

Either type/paste text directly, or upload a file to hash.

2

View All Hashes

MD5, SHA-1, SHA-256, and SHA-512 are calculated simultaneously.

3

Compare Results

Compare the calculated hash with an expected value to verify integrity.

4

Copy

Copy any individual hash to your clipboard.

Frequently Asked Questions

Why is MD5 calculated with a different library?
The Web Crypto API doesn't support MD5 for security reasons (it's considered broken for cryptographic use). We use spark-md5, a pure JavaScript implementation, for MD5.
Is my data sent to a server?
No. All hashing is done locally in your browser using Web Crypto API (SHA-*) and spark-md5 (MD5). Your data never leaves your device.
What's the difference between these hash algorithms?
MD5 produces 128-bit hashes (32 hex chars), SHA-1 produces 160-bit (40 chars), SHA-256 produces 256-bit (64 chars), SHA-512 produces 512-bit (128 chars). Longer hashes are more collision-resistant but slower to compute.
Can I verify a file download with this?
Yes. Upload the file and compare the calculated hash with the checksum published by the file source.
Is MD5 still useful?
MD5 is not recommended for security purposes due to known collision vulnerabilities. However, it's still widely used for non-cryptographic checksums and backward compatibility.

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