IPv4 subnet calculator
Calculate the network, broadcast, usable address range and host count from an IPv4 address with a CIDR prefix or subnet mask.
URL parser and query editor
Inspect URL components and edit query parameters without losing repeated names, their order or the URL fragment.
URL components
Editing a parameter updates the address. Repeated names keep their order; spaces use + in query values.
About this tool
Inspect URL components and edit query parameters without losing repeated names, their order or the URL fragment.
How to use
Paste a complete http, https or ftp address. Inspect its host, path, fragment and other components, then edit, add or remove query parameters. Copy the rebuilt URL when ready. The address is parsed locally and never requested.
Repeated parameter names remain separate entries. Query spaces become + and literal plus signs become %2B. The browser normalizes hostnames and default ports. Passwords in URLs stay behind an expandable field. Limits: 64 KiB per URL and 500 parameters.
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