Hash anything. Instantly. In your browser.

What this tool does

HashForge is a free, browser-based hash generator. Enter any password, sentence, API key, or block of text and it instantly computes the MD5, SHA-1, SHA-256, and SHA-512 digests side by side. There's no submit button and no server round-trip — every algorithm listed above runs as plain JavaScript in the tab you're looking at right now.

That distinction matters more than it sounds. A hash generator that posts your input to a backend before returning a result means your data — which might be a real password, a customer record, or a private key fragment — has left your machine. This tool never does that. You can disconnect from the internet after the page loads and every calculator on this site keeps working.

Why people use a hash generator

• Verifying file integrity. Compare the SHA-256 of a downloaded file against the checksum published by the vendor to confirm nothing was corrupted or tampered with in transit.
• Storing passwords (the right way). Understanding what a raw MD5 or SHA-256 digest of a password looks like — and why it's not, on its own, safe for production password storage — is a common first step before moving to bcrypt or Argon2. See our bcrypt password hashing guide.
• Generating deterministic identifiers. Hashing a known input (a URL, an email address, a file path) produces a fixed-length, collision-resistant ID useful for caching keys, database sharding, or deduplication.
• Learning cryptographic fundamentals. Watching the same input produce wildly different, fixed-length output across algorithms is one of the clearest ways to build intuition for how hash functions behave.

Choosing the right algorithm

Algorithm	Output size	Good for	Avoid for
MD5	128-bit	Non-security checksums, cache keys	Passwords, digital signatures, anything security-critical
SHA-1	160-bit	Legacy compatibility (git objects, old certs)	New security systems — deprecated since 2017
SHA-256	256-bit	File integrity, blockchains, TLS, general-purpose hashing	Storing passwords directly (too fast — see below)
SHA-512	512-bit	Same as SHA-256 with a larger security margin and faster performance on 64-bit hardware	Same caveats as SHA-256 for passwords
bcrypt	184-bit, salted	Password storage — purpose-built to be slow	Hashing large files or non-password data (it's intentionally slow)

Notice the pattern: MD5, SHA-1, SHA-256, and SHA-512 are all general-purpose hash functions optimized to be fast. Speed is exactly what you don't want when hashing passwords, because it's also what makes them cheap for an attacker to brute-force at billions of guesses per second on modern GPUs. bcrypt (and Argon2, PBKDF2, scrypt) are deliberately slow and tunable, which is what makes them appropriate for password storage. Explore our dedicated bcrypt hash generator if that's what you're here for.

How to use the hash generator

Type or paste your text into the input field at the top of this page. Every configured algorithm updates on every keystroke — there's no "Generate" button to click. Use the copy icon next to any digest to copy it straight to your clipboard.