Hash Generator
Generate MD5, SHA-256, SHA-512, BLAKE3, and 25+ cryptographic hashes to verify file integrity
Generate cryptographic hashes using SHA-256, SHA-512, BLAKE3, MD5, and 10+ other algorithms. Paste text or upload a file to compute its hash instantly. All processing runs locally in your browser.
How to use Hash Generator
Enter text or upload a file
Type or paste text into the input field, or upload a file to hash its binary contents.
Select hash algorithms
Choose one or more algorithms: MD5, SHA-1, SHA-256, SHA-512, BLAKE3, and others. All selected hashes are computed simultaneously.
Copy your hash
Each hash output appears instantly. Click the copy icon next to any hash value to copy it to your clipboard.
Input mode
Hash results
What is a cryptographic hash?
Hash Generator computes cryptographic hash values for text or file input. It supports over 25 algorithms including MD5, SHA-1, SHA-256, SHA-512, SHA-3, BLAKE3, and more. Hash values are used to verify data integrity, store passwords securely, and identify files uniquely.
Hashing runs entirely client-side (see our processing model for details). You can compute multiple hash algorithms simultaneously to compare outputs side by side.
Cryptographic hashes are used across software development, security, and IT operations. Developers hash passwords before storing them in databases (using algorithms like bcrypt or Argon2, which build on primitives like SHA-256). CI/CD pipelines compute file hashes to detect changes and invalidate caches. Package managers (npm, pip, cargo) verify download integrity by comparing hashes against a published lockfile. Forensic analysts hash disk images and evidence files to establish chain of custody. Blockchain systems use SHA-256 double-hashing to link blocks. Git uses SHA-1 (and is migrating to SHA-256) for commit, tree, and blob object identification.
The choice of hash algorithm depends on your requirements. SHA-256 (part of the SHA-2 family) is the current industry standard — it produces a 256-bit (32-byte) digest, is widely supported, and has no known vulnerabilities. SHA-512 provides a wider 512-bit digest for extra security margin. SHA-3 (Keccak) is the newest NIST standard, offering a completely different internal design from SHA-2 as a hedge against future cryptanalytic breakthroughs. BLAKE3 is the fastest cryptographic hash available, producing output at over 1 GB/s on modern hardware, making it ideal for hashing large files. MD5 and SHA-1 are broken for collision resistance and should only be used for non-security checksums or legacy compatibility. For a deeper exploration of hash algorithms and their applications, see our encryption algorithms guide.
Frequently asked questions
What hash algorithm should I use?
For new applications, use SHA-256 or SHA-3. For checksums where speed matters, BLAKE3 is excellent. MD5 and SHA-1 are broken for security purposes and should only be used for legacy compatibility or non-security checksums.
Can I hash a file?
Yes. Upload any file and the tool will compute its hash from the raw binary contents. File hashing is commonly used to verify download integrity — compare the generated hash against the checksum published by the file's source.
Why do two different files sometimes produce the same MD5 hash?
MD5 is vulnerable to collision attacks where two distinct inputs produce the same hash. Researchers have demonstrated practical MD5 collisions since 2004. For integrity verification, use SHA-256 or BLAKE3 instead, which have no known collisions.
Can hash values be reversed to recover the original input?
No. Cryptographic hash functions are one-way — it is computationally infeasible to derive the original input from the hash output. This is by design and is what makes them useful for integrity checks and password storage.
How do I verify a file checksum?
Upload the downloaded file to this tool and select the same algorithm used by the publisher (usually SHA-256 or MD5). Compare the generated hash with the checksum provided on the download page. If they match exactly, the file has not been corrupted or tampered with during transfer.
What is the difference between SHA-256, SHA-3, and BLAKE3?
All three are cryptographically secure hash functions with no known vulnerabilities. SHA-256 (SHA-2 family) is the most widely deployed and accepted standard. SHA-3 (Keccak) uses a completely different sponge construction, providing a hedge if SHA-2 is ever weakened. BLAKE3 is the fastest of the three — roughly 5-10x faster than SHA-256 in software — making it excellent for hashing large files or high-throughput applications. For most purposes, SHA-256 is the safe default choice.
Can I use this tool to generate a password hash?
This tool computes raw cryptographic hashes, which are not the same as password hashes. For password storage, you should use dedicated password hashing algorithms like bcrypt, scrypt, or Argon2, which include salting and intentional slowness to resist brute-force attacks. A raw SHA-256 hash of a password can be brute-forced quickly because SHA-256 is designed to be fast. Use this tool for integrity verification, checksums, and non-password hashing tasks.
Related tools
HMAC Generator
Generate HMAC-SHA256 and HMAC-SHA512 authentication codes to sign API requests and verify webhooks
Base64 Encoder
Encode and decode Base64 strings and files for APIs, emails, and data URIs
Encrypt / Decrypt
Encrypt and decrypt data with AES, DES, Triple DES, and RC4 symmetric ciphers
Protect PDF
Password-protect and encrypt a PDF document
Random String Generator
Generate secure random passwords, API keys, and tokens with cryptographic randomness
Related guides
AES vs DES vs Triple DES: Encryption Algorithms Explained
An educational overview of symmetric encryption algorithms, their security levels, key sizes, and when to use each one in modern applications.
Working with JSON: Formatting, Validation, and Debugging
A practical guide to working with JSON data, covering formatting, validation, common errors, debugging techniques, and useful developer tools.
Regular Expressions: A Practical Guide for Developers
Learn regular expressions from the ground up with practical examples, common patterns, debugging tips, and a reference of essential regex syntax.
Base64 Encoding and Decoding: Developer Guide
Learn what Base64 encoding is, how it works, when to use it, and common pitfalls. Covers data URIs, API payloads, email attachments, and JWT tokens.
Cryptographic Hash Functions: SHA-256, MD5, and Beyond
An in-depth guide to hash functions covering SHA-256, SHA-3, MD5, BLAKE3, and their applications in file integrity, passwords, digital signatures, and blockchain.