Protocol tools
ClientReference and parsing helpers for HTTP, addressing, metadata, and developer ergonomics—open a card for the dedicated route.
Browse protocol utilities
Cards follow the home catalog order for this category.
CIDR calculator (IPv4 & IPv6)
ClientIPv4 or IPv6 CIDR: network, range, mask or prefix size—computed locally in your browser.
SQL formatter
ClientPretty-print SQL with dialect presets—pair with SQL minify on the compress page.
URL slug generator
ClientHeadlines to SEO-friendly path segments: hyphens, diacritics, ASCII or Unicode, optional max length—local only.
User-Agent parser
ClientBrowser, OS, and device from a UA string—useful for logs and debugging.
HTTP status codes
ClientHTTP response status reference: search 1xx–5xx, short meanings, copy status lines—client-side.
Open Graph preview
ClientPaste HTML head or og: meta lines—see title, description, and image URL fields.
Robots.txt & sitemap preview
ClientPaste robots.txt or sitemap XML—see User-agent groups, rules, and URL list in your browser.
MIME types & file extensions
ClientLook up common MIME types from extensions (and vice versa)—filterable table, copy Content-Type—client-side.
SemVer compare & sort
ClientCompare two versions or sort a list—Semantic Versioning 2.0.0, prerelease order—client-side.
HTTP methods
ClientGET, POST, PUT, PATCH, DELETE—safe, idempotent, body usage—quick reference for APIs, client-side.
HTTP headers
ClientCommon request and response header fields—names, direction, and short summaries—filterable client-side.
TCP & UDP ports
ClientWell-known and common port numbers with IANA-style service names—filter by port, protocol, or keyword—client-side.
Pseudo-CLI
ClientTerminal-style commands in the browser—open catalog tools with optional -q prefill; same pages as the GUI.
Common use cases
- Use HTTP status and headers when documenting APIs or debugging responses without leaving the browser.
- Open CIDR when you need network, broadcast, or host range math for IPv4 or IPv6 prefixes.
- Use MIME types or IANA ports when mapping extensions, Content-Type values, or service names.
- Try Open Graph or robots/sitemap preview when checking marketing HTML or crawler rules.
Common mistakes to avoid
Treating reference tables as runtime authority
Tables summarize common cases; your server, CDN, or framework may add nuances—verify in environment-specific docs.
FAQ
Does the pseudo-CLI upload commands?
It navigates to other Toolcore routes with optional prefills; it does not execute shell on a remote host.
Where is JSON formatting?
Use the JSON hub at /tools/json for pretty-print, validation, and conversions.