Generate secure API keys with configurable length, character set, and optional prefix. Use with any authentication scheme. Code never leaves your device — formatting and validation run locally in your browser.
Content reviewed October 2026 · About Toolzum
Generate RSA key pairs (2048/4096-bit) using the Web Crypto API. Export public and private keys as PEM strings. All client-side, no server uploads.
Hash API keys using SHA-256 for secure storage. Never store raw API keys — hash them before persisting to your database.
Validate API key format and structure — charset, length, and provider prefix patterns checked instantly without exposing secrets anywhere.
Analyzes your writing with real-time word count, character counts with and without spaces, sentence and paragraph counts, plus estimated reading time (200 wpm) and speaking time (150 wpm). Essential for writers, students, and SEO professionals tracking length and pacing.
Generates cryptographically strong random passwords with fully customizable length and character sets, plus memorable passphrases. Input never leaves your device — everything runs locally in your browser.
256 bits (43 base64 chars) for serious use; shorter only for low-stakes tokens.
Yes — base64url alphabet with no +/= characters that break URLs.
Browser cryptographic randomness — never Math.random for secrets.
No — generation runs locally in your browser, free with no signup.