detect possibly catastrophic, exponential-time regular expressions

Safer Node.js Buffer API

Prevent defined property getters from throwing errors

Like JSON.stringify, but doesn't blow up on circular refs.

Parse JSON safely without throwing

Sanitize strings for use as JavaScript identifiers & property names

URL and cookie safe UIDs

Round numbers without floating point errors

Give a regex, get a robust predicate function that tests it against a string.

Lint and health-check any Model Context Protocol (MCP) server over stdio. Handshake, tools/list, JSON Schema validation, latency, and safe round-trips.

`Array.prototype.concat`, but made safe by ignoring Symbol.isConcatSpreadable

Push an array of items into an array, while being robust against prototype modification

URL Safe Base64 encoding

Constant-time comparison algorithm to prevent timing attacks.

Timers with near-infinite duration support

Parse json safely and at max speed

Crash or abort if you get an unhandledRejection or multipleResolves

Determine whether a JavaScript expression evaluates to a constant

detect possibly catastrophic, exponential-time regular expressions

require.resolve without throwing