What AnyHash is
AnyHash is a suite of small, focused hash tools: an MD5, a SHA-256, a BLAKE3, a bcrypt, an Argon2id generator, and a side-by-side comparison of five algorithms. Each tool exists to answer one question as simply as possible — what is the hash of this input? — and to explain the answer accurately, down to the algorithm's internals. We deliberately ship no login, no accounts, no dashboards, and no tracking: there is nothing to sign up for and nothing that leaves your device.
Why we built it
Most "online hash calculators" work the opposite of how they should. You paste your data into a webpage, it is POSTed to a remote server, the server computes the hash and returns it. For checksums that is mildly annoying; for passwords, API keys, and secrets it is unacceptable — the plaintext has left your machine before the page even finished loading.
The modern browser is a capable cryptography runtime. It ships a native Web Crypto API, a hardware-accelerated SHA family, and the performance to run WebAssembly at near-native speed. That means password hashing and checksums no longer require a server at all. AnyHash was built to prove the point: the tool is the entire product. Open the network tab while you use any page here and you will see zero requests carrying your input.
How the tools work
- SHA-256, SHA-384, SHA-512, SHA-1 run on the browser's native
crypto.subtle— no JavaScript implementation, real hardware acceleration. - MD5 isn't exposed by the Web Crypto API, so it runs on a compact, dependency-free JavaScript implementation that follows RFC 1321 exactly. It exists for legacy checksums and testing — and comes with a clear warning about MD5's known weaknesses.
- bcrypt runs via
bcryptjs, a widely deployed pure-JavaScript Blowfish implementation. - Argon2id runs via a WebAssembly build of the reference Algorithm in a Web Worker thread, so the page stays responsive while a large memory-hard hash is computed.
Accuracy and editorial standards
Cryptographic claims on this site are written (and re-verified) against primary sources: the original RFCs, FIPS publications, IETF documents, and the OWASP Password Storage Cheat Sheet. Every reference hash you see in our articles — the RFC 1321 test vectors, the FIPS 180-2 vectors, and the Argon2 output examples — is regenerated and checked before publication, and the tools themselves are tested against the same vectors in our build pipeline. When a claim changes (for example, a new cryptanalytic result), the affected articles are updated and re-dated rather than quietly left stale.
If you find an error, a dated statement that no longer holds, or a tool that returns a wrong hash, please contact us. Corrections are made, acknowledged, and reflected in the article's review date.
Who runs AnyHash
AnyHash is run by Mohit Singh — an independent operator rather than a corporation. There is no venture funding, no analytics contract, and no data resale business model. The project is sustained entirely by reader goodwill and (from time to time) unobtrusive advertising.
You can reach us by email at contact@anyhash.online, and you can read the full policy details on our Privacy page.
Transparency
We believe claims about privacy should be checkable, not just stated. Three ways to verify what we say:
- Open your browser's developer tools (F12 → Network) and use a tool on this site. The only requests you will see are the page, its CSS, and its fonts.
- Reproduce the outputs. Every article on this site publishes the exact digest its tool should produce for a given input, cross-checked with the reference vectors above.
- Read the source. The entire site is open source, with the components, scripts, and build configuration available for audit: https://github.com/[YOUR-GITHUB-USERNAME]/anyhash.
Last updated: September 2026.