Hash Generator Online - Free, All Algorithms
Overview
Different systems require different hash algorithms. AWS S3 ETags use MD5. Git uses SHA-1. JWT signatures use HMAC-SHA256. TLS certificates use SHA-256 or SHA-384. Rather than switching between separate tools, paste your input once and get all five hashes in parallel. Web Crypto handles SHA-1 through SHA-512; MD5 uses an inline implementation.
How to Use This Tool
Paste text or drop a file. All five hash outputs (MD5, SHA-1, SHA-256, SHA-384, SHA-512) appear simultaneously. For HMAC, enable the toggle, enter your secret key, and select the algorithm. Copy any individual hash with the icon next to it.
Ready to get started? It's free, no registration required, and your files never leave your device.
PDF Tool →Frequently Asked Questions
Which hash algorithm should I use for a new project?
Use SHA-256 for general integrity checks and HMAC-SHA256 for message authentication. Use SHA-512 if you need a longer digest for extra security margin. Avoid MD5 and SHA-1 for any new security-sensitive application.
What is the difference between a hash and an HMAC?
A hash is a one-way digest of data with no key. An HMAC (Hash-based Message Authentication Code) combines the data with a secret key before hashing. HMAC proves both integrity and authenticity because only someone with the key can produce the correct value.
Can I hash a file larger than 100MB in the browser?
The tool reads files using the FileReader API, which loads the file into memory. Very large files (over 500MB) may exhaust browser memory. For large file checksums, a command-line tool like sha256sum is more appropriate.