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Web Crypto API

Online Hash Generator & Checksum Calculator

Compute cryptographic hash values for any text or file instantly using SHA-256, SHA-1, SHA-384, SHA-512, and MD5 algorithms. The SHA family uses the browser's native Web Crypto API for maximum performance and reliability.

Ideal for verifying file integrity, generating content checksums, validating downloads, and comparing data fingerprints. All hashing is performed locally — your text and files never leave your browser.

All hashes are calculated directly in your browser using the Web Crypto API. Files and text are never uploaded.
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How It Works (Step-by-Step)

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1. Enter Text or Upload a File

Type or paste text into the input field, or switch to file mode and drag-and-drop a file to compute its hash.

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2. View All Hashes

All supported hash algorithms (SHA-1, SHA-256, SHA-384, SHA-512, MD5) are computed simultaneously and displayed in real time.

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3. Copy the Hash You Need

Click the copy button next to any hash value to transfer it to your clipboard for comparison, verification, or storage.

Key Features & Advantages

Multiple Algorithms at Once

Computes SHA-1, SHA-256, SHA-384, SHA-512, and MD5 hashes simultaneously so you can compare and choose the right one for your use case.

Web Crypto API Performance

SHA-family hashes are computed using the browser's native SubtleCrypto API, delivering hardware-accelerated performance even for large inputs.

Text and File Hashing

Hash plain text input or entire files by drag-and-drop. File hashing processes the raw binary content without any server upload.

Privacy-First Architecture

Your text, files, and computed hashes are processed entirely within your browser. Nothing is transmitted, stored, or logged by this tool.

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Frequently Asked Questions

What is a cryptographic hash?
A cryptographic hash function takes any input data and produces a fixed-size string of characters (the hash or digest) that uniquely represents that input. Even a tiny change in the input produces a completely different hash. Common uses include data integrity verification, digital signatures, and content addressing.
Which hash algorithm should I use?
For general-purpose integrity checks and checksums, SHA-256 is the most widely recommended choice. SHA-512 provides a longer digest for higher collision resistance. SHA-1 and MD5 are considered cryptographically deprecated for security-sensitive applications but remain useful for non-security checksums and legacy compatibility.
Can I use SHA-256 or MD5 for password hashing?
No. SHA-256, SHA-1, MD5, and other standard hash functions are not designed for password hashing. They are too fast, making them vulnerable to brute-force and dictionary attacks. Password hashing requires specialized algorithms like bcrypt, scrypt, or Argon2 that are intentionally slow and include salting.
Is MD5 still safe to use?
MD5 is cryptographically broken for collision resistance and should not be used for security purposes such as digital signatures or certificate verification. However, MD5 remains widely used for non-security checksums, file integrity verification in trusted environments, and legacy system compatibility.
How does file hashing work in this tool?
When you drag a file onto the tool, it reads the file's raw binary content using the browser's FileReader API, then passes the bytes to the Web Crypto API (for SHA) or the inline MD5 implementation. The entire process happens locally — no file data is uploaded to any server.
What is a checksum?
A checksum is a value computed from a data set that can be used to verify the data has not been altered. While technically all cryptographic hashes can serve as checksums, the term checksum is often used more broadly to include simpler, faster algorithms like CRC32. This tool provides cryptographic hash functions that offer stronger integrity guarantees.

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