zippydevtoolsNetwork and HTTP
Local debugging tools for URLs, headers, HTTP status codes, User-Agent strings, and subnets
Debug web requests locally by parsing URLs, query strings, HTTP headers, User-Agent strings, status codes, and IPv4 CIDR ranges without calling a remote lookup service.
Priority tools
Start with the most common workflows in this category, then move to adjacent tools when needed.
Query String Parser
Convert query strings into readable JSON for UTM, OAuth, filters, redirects, and deep-link debugging.
URL Parser
Break a URL into protocol, domain, path, query string, hash, and port for redirect and callback debugging.
HTTP Headers Parser
Paste HTTP headers and convert them into readable JSON for cache, CORS, redirects, cookies, and security review.
User-Agent Parser
Identify browser, operating system, device type, and engine from a User-Agent string.
HTTP Status Code Reference
Look up common HTTP status codes for debugging APIs, redirects, cache behavior, and authentication errors.
Recommended workflows
Contextual links for combining tools without leaving the cluster.
Debug a redirect or callback
Split a URL, inspect query parameters, and decode encoded values when a callback or redirect does not behave as expected.
Inspect HTTP response context
Parse headers, look up the status code, and inspect User-Agent context from logs or copied request data.
Review network allowlists
Calculate IPv4 CIDR ranges before applying allowlists, firewall rules, VPN ranges, or cloud security groups.
URL Parser
Break a URL into protocol, domain, path, query string, hash, and port for redirect and callback debugging.
Query String Parser
Convert query strings into readable JSON for UTM, OAuth, filters, redirects, and deep-link debugging.
HTTP Headers Parser
Paste HTTP headers and convert them into readable JSON for cache, CORS, redirects, cookies, and security review.
User-Agent Parser
Identify browser, operating system, device type, and engine from a User-Agent string.
HTTP Status Code Reference
Look up common HTTP status codes for debugging APIs, redirects, cache behavior, and authentication errors.
CIDR/Subnet Calculator
Calculate network, broadcast, subnet mask, wildcard mask, and usable range for IPv4 CIDR blocks.