Validation

Plan a WebAssembly component deployment: wac-style link graph and plug commands, WASI Preview 2 support across five runtimes, JSPI flags, and size / cold-start / TTFB / memory budgets.

Security

Hide text in a PNG's least-significant bits, extract it back, and run the Westfeld–Pfitzmann chi-square steganalysis with a falling-p curve and LSB plane preview.

Cryptography

Decode WebAuthn/FIDO2 assertion fields, inspect authenticatorData flags and signCount, check challenge/origin/rpIdHash binding, and optionally verify ES256, RS256, or Ed25519 signatures with a supplied COSE public key.

Security

Encrypt text with an RSA public key or decrypt ciphertext with the matching private key, using OAEP padding (SHA-1 or SHA-256). Handles long messages by chunking. Keys and data stay local. PKCS#1 v1.5 is intentionally not offered (Node disables it for decryption due to Bleichenbacher attacks).

Security

Generate an RSA key pair (2048/3072/4096-bit) as PEM-encoded public and private keys. Optionally encrypt the private key with a passphrase. PKCS#8 (recommended) or PKCS#1 private key format. Everything runs locally.

Validation

Validate 9-digit US ABA bank routing numbers (RTN) with MICR check-digit verification, Federal Reserve district lookup and ABA institution breakdown.

Validation

Lint robots.txt syntax, flag risky rules, and test important URLs before you ship crawler directives

Security

Compare safe and unsafe PDF extraction runs to detect hidden text, off-page content, tiny text, and hidden-layer prompt injection risks

Validation

Validate International Bank Account Numbers (IBAN)

Security

Detect XSS (Cross-Site Scripting) attack vectors in input strings

Validation

Validate JSON data against a JSON Schema to verify structure and data types

Validation

Validate International Bank Account Number (IBAN) and SWIFT/BIC codes with checksum verification