All Tools

Every tool on this site in one place. All of them are free, need no sign-up, and run the sensitive work (passwords, hashing, encryption) in your browser rather than on our server.

IP & Network

What Is My IP See your public IPv4 and IPv6 address, plus browser and time-zone details. IP to Timezone Find the IANA time zone, UTC offset and local time for any IP address. IP WHOIS Lookup Look up the registry owner, network block, ASN and abuse contact for an IP. Reverse DNS Lookup Resolve the PTR hostname for an IP and check forward-confirmed reverse DNS. DNS Lookup Query A, AAAA, MX, NS, TXT and SOA records for any domain name. Subnet Calculator Work out network and broadcast addresses, host ranges and masks for IPv4/IPv6. Network Health Check your connection's online status, latency and request timing in the browser. Internet Speed Test Measure your download, upload and ping speeds right in the browser. HTTP Header Checker Inspect a site's HTTP response headers and its security header coverage.

Browser & Device

Screen Resolution Show your screen resolution, colour depth, pixel ratio and device display info. User Agent Decoder Parse your browser's user-agent string into browser, engine and OS details.

Passwords & Encryption

Password Generator Generate strong random passwords in your browser with adjustable rules. Passphrase Generator Create memorable multi-word Diceware passphrases that are still hard to guess. Encryption Tool Encrypt and decrypt short text with AES, entirely on your device. Wi-Fi QR Code Generator Build a QR code guests scan to join your Wi-Fi, or decode one from an image.

Hashing & Crypto

Hash Generator Compute SHA-256, SHA-512, SHA-1 and MD5 hashes from text or a file. HMAC Generator Generate keyed HMAC-SHA256/384/512 message authentication codes. Bcrypt Generator Hash and verify passwords with bcrypt at a cost factor you choose. Crypto Address Validator Check that a Bitcoin or Ethereum address is well-formed and its checksum valid.

Encoders & Developer Tools

JWT Decoder Decode a JSON Web Token's header, payload and claims locally in your browser. Base64 Encoder / Decoder Encode and decode Base64, including URL-safe mode, for text or files. URL Encoder / Decoder Percent-encode and decode URL strings and query-string values. UUID Generator Generate random version 4 UUIDs, one at a time or in bulk.