All Tools
37 toolsNetwork
9IP Address Lookup
Get detailed information about IPv4 and IPv6 addresses including location, ISP, and registry data.
MAC Address Vendor Lookup
Look up MAC address vendor information using a local OUI database.
DNS Lookup
Query DNS records for domains. Supports A, AAAA, MX, CNAME, TXT, NS, SOA, SRV, CAA, PTR.
PCAP Analyzer
Open a pcap or pcapng capture in the browser: every packet decoded from Ethernet to DNS and TLS, with filters and conversations. Nothing is uploaded.
Port Checker
Check if TCP ports are open on remote hosts. Supports single ports and port ranges.
Sonos Radio Stream Checker
Check if your radio stream URLs are compatible with Sonos S1 and S2 speakers.
SSL/TLS Server Test
Grade the TLS setup of a server: protocol versions, cipher suites, certificate chain, HSTS and known weaknesses.
TLD Lookup
Every top level domain in the root zone, what kind it is, and for a country code which country.
Traceroute
Trace network paths to IPv4 and IPv6 addresses, identify routing issues, and analyze latency.
Telephony
2Caller ID Check
Call a test number and see the caller ID your phone sends: the number the person you call would see, or that it is withheld.
Phone Number Lookup
Look up a phone number: the country it belongs to, what its range is for, whether the numbering plan gives it out, and every form it is written and dialled in.
Encoding
7Base64 Converter
Encode and decode Base64 strings and files.
Code Minifier
Minify JavaScript, CSS, HTML, SVG and JSON to reduce file sizes.
Color Converter
Convert colors between HEX, RGB, HSL, HSV, and CMYK.
HTML Encoder
Encode and decode HTML entities.
JWT Decoder
Decode and analyze JSON Web Tokens. Tokens never leave your browser.
Punycode Converter
Convert internationalized domain names to Punycode and vice versa.
URL Encoder
Encode and decode URLs and query strings.
Crypto
3Calculators
6Date Calculator
Calculate differences between dates and determine age.
Number Base Converter
Convert whole numbers of any size between decimal, hexadecimal, binary, octal and any base up to 36, and read their bytes, bit widths and two's complement.
Percentage Calculator
The six questions percentages are asked in, each on its own line, including the two that work backwards to the number you started from.
Subnet Calculator
Work out the network, the host range, the broadcast address and the masks of an IPv4 or IPv6 subnet, and whether another address is in it.
Timestamp Converter
Convert a Unix timestamp to a date and back, in seconds, milliseconds, microseconds or nanoseconds, and read any date as ISO 8601, as an HTTP date and in any time zone.
Unit Converter
Convert between units of measurement: length, weight, temperature, data storage, and more.
Text
3Case Converter
Thirteen ways to write the same text, all at once: the four for prose, the seven used in code, and two for fun.
Lorem Ipsum Generator
Placeholder text by paragraph, sentence or word, from three word banks, ready to paste or wrap in HTML.
Word Counter
Words, characters, sentences and paragraphs, with reading and speaking times and the words that recur most.
Validators
3Email Validator
Checks the syntax of an address in your browser, and on request whether its domain is disposable and can receive mail.
JSON Validator
Says what is wrong with a JSON document and where, then formats it the way you want it.
XML Validator
Says what is wrong with an XML document and where, then formats it the way you want it.