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All converters and file utilities process 100% locally in your browser. Zero server upload.
Browse all free tools in this category.
Generate secure random keys and secrets for API authentication. Hex or Base64, custom length, crypto-grade randomness. Length (bytes):…
Identify hardware manufacturers from MAC addresses using the built-in IEEE OUI database. Also detects multicast and locally-administered addresses.…
Check real SSL/TLS certificate details for any domain using public Certificate Transparency logs (crt.sh). Shows issuer, validity dates…
Parse any user-agent string to detect browser, version, OS, device type and bot status. Your own UA loads…
Generate secure password hashes in your browser. Note: browsers cannot run real bcrypt — this tool uses SHA-256…
Check password strength live with crack-time estimates.
Generate Apache .htpasswd entries in MD5-APR1 ($apr1$) format for password-protecting directories. Runs entirely in your browser. Username Password…
Check whether a card number is structurally valid using the Luhn algorithm, with automatic card-type detection (Visa, Mastercard,…
Generate MD5 hashes instantly in your browser. Useful for checksums — not recommended for password storage. Generate MD5…
Generate SHA-256 hashes with the Web Crypto API. Fast, secure, and fully private — runs in your browser.…