Network Tools - API Testing / HTTP / URL / IP Calculator
10 toolsOnline network tools: HTTP API tester, URL parser, User-Agent parser, CIDR calculator, subnet calculator, regex tester.
API & HTTP3
API Tester
Online API tester: GET/POST/PUT/DELETE/PATCH with custom Headers/Body, 30s timeout with cancel. Postman alternative.
HTTP Method Cheatsheet
Free online HTTP method cheatsheet. GET/POST/PUT/DELETE/PATCH methods with safety, idempotency, and cacheability at a glance.
HTTP Status Codes Reference
Complete HTTP status code reference: all 1xx/2xx/3xx/4xx/5xx codes with names, descriptions, and use cases. Searchable and filterable, links to MDN docs.
URL & UA Parsing3
URL Parser & Builder
Free online URL parser tool that breaks down protocol/domain/path/params/hash with visual parameter editing and real-time two-way sync
URL Parameter Parser
Free online URL parameter parser. Quickly parse and edit URL query parameters with add/delete/edit support.
User-Agent Parser
Free online User-Agent parser tool. One-click detection of browser, operating system, device type, vendor, model, and more. Supports bot/crawler detection, mobile/desktop identification, and all major browsers.
IP & Subnet2
CIDR Calculator
Online IPv4 CIDR calculator: input IP/prefix (e.g., 192.168.1.0/24) to calculate network address, broadcast address, subnet mask, host range, and total hosts. Essential for network engineers.
Subnet Calculator
Free online IP subnet calculator. Supports CIDR calculation, subnet division, network and broadcast address computation.