All tools

2FA codes Featured Paste a secret or a QR image and get the 2FA code. Code reader Featured Read QR codes from an image or straight from the camera. Password generator Featured Generate strong passwords and score their strength. JWT decoder Split a JWT into three parts, read the claims and check the signature. Pwned password check Check whether a password or email shows up in known data breaches. The password never leaves your device. Encrypt text Encrypt a message with a password before sending it over chat. Everything runs in your browser. File checksum Compute MD5, SHA-1, SHA-256 and SHA-512 for a file and compare with the publisher's hash. The file never leaves your device. QR generator Featured Create a QR code from any text or link.

IP lookup Featured See your own IP and look up any address. DNS records Featured Look up A, AAAA, MX, TXT and NS records for a domain. Subnet & CIDR Work out IPv4/IPv6 blocks: mask, host range, subnetting. MAC lookup Find the vendor behind a MAC address, reformat it, build the EUI-64. WHOIS Featured Who registered this domain or IP range, and until when. Port check Featured Probe common TCP/UDP ports to see which are open. TCP latency Featured Measure latency to a host with a TCP handshake. Proxy checker Featured Check whether HTTP, SOCKS4 and SOCKS5 proxies are alive and how well they hide your address. SSL/TLS check Featured Inspect a TLS certificate: days left, name match, and which TLS versions the server takes. Reverse IP lookup Find the domains that point at one IP address. Link preview Featured See how a link looks when shared on social media and chat apps, and which tags are missing. Redirect tracer See every page a link passes through before it lands, especially a short link. ASN & IP range lookup Look up the ASN, network owner and every IP range of an address, domain or organisation. Email header analyzer Paste an email’s raw headers to see its route, SPF, DKIM, DMARC results and phishing signs. Spam blacklists Check whether an address sits on anti-spam blocklists. Mail security Check a domain SPF, DMARC, MX and MTA-STS records.

Unit converter Convert units: length, mass, temperature, data size and more. Currency converter Convert between world currencies and crypto at rates updated every minute, with bank buy and sell prices in VND. Number base converter Convert between binary, octal, decimal, hex and read the bits. Time converter Convert Unix timestamps to dates and between time zones. Colour converter Convert HEX, RGB, HSL and CMYK, and score WCAG contrast.

Text tools Sort, filter, encode and hash text in bulk. ID generator Generate UUIDs, ULIDs and Nano IDs, or inspect an existing one. Cron reader Explain a cron expression and list its next runs.

Keyboard tester Press each key to see which ones work, which are dead, double-typing or stuck. Also measures how many keys register at once. Speaker & headphone test Check left and right channels, reversed wiring, and sweep from bass to treble to find rattles. Includes a step-by-step auto test. Microphone test See whether your mic picks up too loud or too quiet, distorts, hisses or hums, with waveform, spectrum and a record-and-play-back check. Includes a 9-second auto test.