NodeCrypto.dev
NodeCrypto connects cryptographic operations as nodes and runs and verifies them in the browser. Check results against published test vectors and inspect every intermediate value.
NodeCrypto connects cryptographic operations as nodes and runs and verifies them in the browser. Check results against published test vectors and inspect every intermediate value.
This page is designed to help you find out whether NodeCrypto.dev is good and if it is the right choice for you.
Visual node-graph builder for cryptographic workflows, running in your browser.
Listed in
PQC
Post-Quantum Cryptography. ML-KEM, ML-DSA, SLH-DSA, Hybrid KEM
Symmetric Crypto
AES, TDES, SEED, ARIA, Camellia, SM4, ChaCha20
Asymmetric Crypto
RSA, ECC, Ed25519, X25519, ECDH
Security engineers, cryptography and applied-security developers, protocol and payment-system analysts, penetration testers, and students who need to build, verify or debug multi-step cryptographic procedures. It also suits teams who want to document or share a procedure in a form others can open and run.
NodeCrypto turns a cryptographic procedure into a graph of nodes. Instead of a single calculator or a linear “recipe,” you wire together AES, HMAC, HKDF, X25519, Ed25519, ML-KEM and other nodes, run the graph, and inspect every intermediate value along the way. Typed connections keep data formats consistent, and workflows can be saved as files, shared with a link, nested inside other workflows, run from the command line, or driven by AI agents through an MCP server.
Tools like CyberChef are excellent for quick encoding and decoding, but multi-step protocols such as key derivation, key exchange and signature verification quickly become hard to follow in a linear recipe. NodeCrypto shows the whole mechanism on one canvas, with branching, reusable sub-workflows and visible intermediate values. That makes it easier to design, debug and explain security logic. Workflows are checked against published test vectors, and the web app is free and needs no installation.
NodeCrypto started from a recurring frustration in security work. Designing or debugging a scheme, such as deriving a key and then verifying a signature over a transaction log, meant recomputing each step by hand with different tools. NodeCrypto was built to make the whole mechanism one visual, runnable workflow, in the spirit of node-based tools like Node-RED but dedicated to cryptography.
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