Hash Generator
Generate secure hashes (SHA-1, SHA-256, SHA-384, SHA-512) instantly in your browser.
About the Hash Generator
Cryptographic hashes turn arbitrary input into a fixed-length fingerprint that changes completely if even one bit of the input changes. This generator computes MD5, SHA-1, SHA-256, and SHA-512 entirely in your browser via the Web Crypto API (window.crypto.subtle.digest), the same primitive that powers HTTPS in every modern browser. Use SHA-256 or SHA-512 for security-sensitive work — MD5 and SHA-1 are included for compatibility with legacy systems but are no longer collision-resistant and should not be used for signatures or password hashing.
Common use cases
- Verify a downloaded ISO or installer matches the publisher's checksum
- Confirm a file you received over email has not been tampered with
- Generate ETag-style fingerprints for cache invalidation
- Quick MD5 / SHA-1 lookups when working with legacy APIs
- Compare two files without uploading either to a server
Why client-side?
Every byte you paste, type, or upload here is processed entirely inside your browser. Nothing is sent to a server, logged, or stored. That means it's safe to use this tool on production secrets, customer data, internal logs, and any input you would not paste into a hosted SaaS formatter.
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Frequently Asked Questions
- What hash algorithms are supported?
- This tool supports MD5, SHA-1, SHA-256, and SHA-512 hashing algorithms, all computed locally in your browser.
- Can I decrypt a hash back to text?
- No. Cryptographic hashes are one-way functions and cannot be reversed. They are used for data integrity verification, not encryption.
- Is this hash generator secure?
- Yes. All hashing is performed locally in your browser using the Web Crypto API. Your text is never sent to any server.
- Can I use SHA-256 hashes to verify file integrity?
- Yes. SHA-256 is widely used for file integrity verification. Generate a hash of your file content and compare it with the expected hash to confirm the file hasn't been tampered with — all without uploading anything.