Paste any cryptographic key (RSA, EC, Ed25519) to inspect key type, size, curve, and public key components.
Cryptographic Key Inspector answers a structural question: what key is contained in the text you pasted? Once it recognizes the encoding, it reads the algorithm-specific fields and presents the key family, bit size, named curve where applicable, and public components. RSA, general elliptic-curve keys, and Ed25519 do not expose the same fields, so inapplicable values are not missing data. The common surprise is that a successfully parsed key is not thereby trusted, matched to a certificate, or judged secure for a particular policy.
The inspector recognizes the pasted key representation and decodes its algorithm identifiers and parameters. It then classifies the key as RSA, EC, or Ed25519 and reports properties relevant to that family. RSA public components are a modulus and exponent; an EC key identifies a curve and public point; Ed25519 carries an Ed25519 public value.
Key size is interpreted in the algorithm's own terms, not as a universal strength score. For RSA it refers to the modulus length. For a named-curve EC key, the curve determines the relevant field size. Ed25519 uses a fixed parameter set, so it does not offer a choice of named curves in the way general EC keys do.
The inspector runs entirely in your browser, so the pasted key is not uploaded by this tool. That does not make copying a private key risk-free: clipboard history, screen sharing, browser extensions, or a compromised device can still expose it. Prefer a public key whenever its fields are sufficient for your check.
No. Successful parsing only shows that the text contains a key structure the inspector recognizes and can decode. It does not establish who created the key, whether the expected party controls its private counterpart, whether a certificate trusts it, whether it has been revoked, or whether its size and parameters meet your policy.
The behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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