Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 cryptographic hashes from text or files instantly. All processing happens locally in your browser.
How to Use
Choose Text or File Mode
Click the "Text" tab to hash a string of text, or click the "File" tab to hash any file on your device. File hashing is useful for verifying the integrity of downloads and backups.
Enter Your Input
In text mode, type or paste any text into the input area. In file mode, click the upload area and select any file — the file is read locally and never uploaded to a server.
Generate All Hashes
Click "Generate Hashes" (in text mode) or simply select a file. All four hashes — MD5, SHA-1, SHA-256, and SHA-512 — are computed and displayed simultaneously.
Copy Individual Hashes
Click the "Copy" button next to any algorithm to copy that specific hash value to your clipboard. Compare the hash with the one provided by a trusted source to verify file integrity.
Frequently Asked Questions
A cryptographic hash function takes an input of any length and produces a fixed-size output (the "hash" or "digest"). The same input always produces the same hash, but even a tiny change in the input — a single character — produces a completely different hash. This makes hashes useful for verifying data integrity, storing passwords securely, and creating digital signatures.
MD5 produces a 128-bit (32-character hex) digest and is extremely fast, but it is cryptographically broken — attackers can engineer collisions (two different inputs with the same hash). SHA-256 produces a 256-bit (64-character hex) digest, is significantly more secure, and is recommended by NIST for modern applications. Use SHA-256 or SHA-512 for security-critical tasks and MD5 only for non-security purposes like fast checksums.
No. Hash functions are designed to be one-way — it is computationally infeasible to reconstruct the original input from the hash alone. However, if the input is short or common (like a simple password), an attacker could use a "rainbow table" (a precomputed database of hashes) to look it up. This is why passwords should always be hashed with a salt and a specialized algorithm like bcrypt or Argon2, not a general-purpose hash like SHA-256.
SHA-256 is part of the SHA-2 family and has no known practical vulnerabilities. MD5 has known collision weaknesses and is considered unsafe for security purposes — real-world attacks have demonstrated that two different files can be crafted to share the same MD5 hash. For file integrity verification, code signing, certificates, and any security-sensitive application, SHA-256 is the standard minimum, with SHA-512 offering even higher security.
No. All hashing is performed entirely within your browser using JavaScript. When you select a file, it is read locally using the FileReader API. Neither the file contents nor the hash results are ever sent over the network. You can even use this tool offline after the page has loaded.