Time & date
Timestamps, time zones and date formats
Handy tools for developers, ready when you open them
Featured tool
Enter an IPv4 or IPv6 address, or a CIDR block, to get its location, ISP, address classification and network range. The lookup runs on this site's server against a bundled offline database — no third-party API is involved.
Try one of these: 8.8.8.8 114.114.114.114 2001:4860:4860::8888 10.0.0.0/8
Public addresses only, last 50 kept, with nothing identifying who looked them up.
Timestamps, time zones and date formats
Base64, URL, HTML, Hex, Binary, Unicode and other common encodings
JSON, XML, regex, JWT, UUID, cron and other everyday helpers
Counting, case conversion, line ops, generators, diff
IP details, HTTP status, MIME types
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Common hash algorithms and digests
Passwords, randomness and secure generators
Loans, interest and repayment plans