Generate a scannable QR code and download a PNG — 100% client-side.
See what your browser reveals about you and its combined fingerprint — 100% local.
Parse a User-Agent into browser, OS, engine and device — 100% client-side.
Text to hex/binary/decimal and number-base conversion — 100% client-side.
Caesar, ROT13, Atbash and Vigenere ciphers plus Caesar brute-force — 100% client-side.
Explain a cron expression in English and see its next run times — 100% client-side.
Convert Unix epoch to/from human dates (UTC, local, ISO, relative) — 100% client-side.
Generate RFC 4122 v4 UUIDs in bulk — 100% client-side.
Beautify, minify and validate JSON with precise error locations — 100% client-side.
Percent-encode/decode and parse URLs into their parts — 100% client-side.
Encode/decode Base64 with UTF-8 and URL-safe support — 100% client-side.
Live regex tester with match highlighting and capture groups — 100% client-side.
Generate strong passwords or passphrases with live entropy — 100% client-side.
IPv4 CIDR / subnet calculator — network, broadcast, host range, masks and counts, fully offline.
Compute a CVSS v3.1 Base score, severity, and vector string — 100% client-side.
Decode a JWT and inspect its claims — 100% client-side; the signature is never verified or transmitted.
Check how strong a password really is and whether it has already appeared in a known data breach.…
Analyse a suspicious link for phishing red flags without ever visiting it. The scanner inspects the structure of…
Paste raw email headers to trace how a message actually travelled and whether it is authentic. The parser…
Identify which algorithm most likely produced a hash from its length and character set. Paste a digest and…