Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from any text instantly — 100% in your browser, nothing sent to a server.
Enter text above to see its hash values
What Is a Hash Generator?
A hash generator takes a piece of text and runs it through a mathematical function called a cryptographic hash function, producing a compact, fixed-length fingerprint called a digest. No matter how long or short your input is, the output is always the same length for a given algorithm — 32 hex characters for MD5, 40 for SHA-1, 64 for SHA-256, and 128 for SHA-512. If you change even a single character, the hash changes completely. That property makes hashes invaluable for detecting accidental or deliberate data modification.
Supported Algorithms
- MD5 — produces a 128-bit (32-character) digest in milliseconds. Widely used for non-security checksums such as verifying that a file survived a network transfer intact, but cryptographically broken and unsuitable for password storage or digital signatures.
- SHA-1 — a 160-bit (40-character) digest standardised by NIST in 1995. Also deprecated for security applications since collision attacks were demonstrated in 2017, but still seen in legacy systems and Git commit identifiers.
- SHA-256 — part of the SHA-2 family, producing a 256-bit (64-character) digest. The current default for SSL/TLS certificates, code signing, Bitcoin transactions, and most modern security protocols. Fast enough for interactive use and considered secure.
- SHA-512 — also SHA-2, with a 512-bit (128-character) output. Marginally slower than SHA-256 on 32-bit processors but faster on 64-bit hardware. Preferred when extra collision-resistance margin is desired, such as long-term archival signatures.
Common Use Cases
Developers use SHA-256 hashes to verify that API responses haven't been tampered with in transit. Security teams hash candidate passwords before comparing them against stored digests (though bcrypt or Argon2 are better choices for actual password storage). Content delivery networks generate ETags from file hashes so browsers know when to re-download assets. Blockchain networks chain blocks together by including the previous block's SHA-256 hash in each new block header, making historical tampering computationally infeasible.
On a practical day-to-day level, you might use an MD5 or SHA-256 hash to confirm that a ZIP file you downloaded matches the checksum published on the project's releases page — a quick way to rule out corruption or a compromised mirror.
How to Use This Tool
Type or paste any text into the input area. All four algorithm outputs update live as you type. Click the copy button next to any hash to copy it to your clipboard. To see a concrete example, use the "Try an example" button to pre-fill the classic pangram "The quick brown fox jumps over the lazy dog."
Privacy Note
This tool runs entirely in your browser. SHA-1, SHA-256, and SHA-512 are computed using
the native crypto.subtle.digest Web Crypto API built into every modern browser.
MD5 uses the open-source SparkMD5 library, bundled into the page. No text you enter is
ever transmitted to our servers or any third party.
Frequently Asked Questions
What is a cryptographic hash and what is it used for?↓
A cryptographic hash function takes any input — a word, a paragraph, a file — and produces a fixed-length string of hex characters called a digest. The same input always produces the same digest, but even a single-character change completely changes the output. Hashes are used to verify file integrity, store passwords securely, create digital signatures, and detect data tampering.
What is the difference between MD5, SHA-1, SHA-256, and SHA-512?↓
MD5 produces a 128-bit (32-character hex) digest and is fast but cryptographically broken — do not use it for security-sensitive work. SHA-1 produces a 160-bit (40-character hex) digest and is also deprecated for security use. SHA-256 and SHA-512 belong to the SHA-2 family: SHA-256 outputs 256 bits (64 hex chars) and SHA-512 outputs 512 bits (128 hex chars). Both SHA-2 variants are considered secure for general use today.
Can I use this tool to check a file's integrity?↓
This tool hashes text, not binary files. To verify a downloaded file's checksum, you would typically use a command-line tool like sha256sum (Linux/macOS) or Get-FileHash (PowerShell on Windows) and compare the result against the hash published by the software author.
Is MD5 still safe to use for passwords?↓
No. MD5 has known collision vulnerabilities and can be reversed via rainbow tables. For password storage, use a purpose-built algorithm like bcrypt, scrypt, or Argon2. MD5 is still useful for non-security checksums like verifying file transfer integrity when collision attacks are not a concern.
Does this tool store or transmit the text I enter?↓
No. All hashing runs inside your browser using the native Web Crypto API (for SHA-1/256/512) and the SparkMD5 library (for MD5). Nothing is sent over the network. You can even use it offline after the page has loaded.