Build IP allowlist rules for firewalls, security groups, and app configs from CIDR lists. Generate AWS, Nginx, and htaccess formats — local, free, no signup.
Content reviewed October 2026 · About Toolzum
Generate Nginx server blocks — reverse proxy, SSL, gzip, caching headers — without syntax hunting. Ship a correct vhost first try — local generation, free, no signup.
Build HTTP requests with method, URL, headers, and body — then generate matching curl commands. Prototype endpoints without leaving the tab — local, free, no signup.
Generate CSS transforms — rotate, scale, skew, translate — with live preview. Build hover effects without guessing syntax — local generation, free, no signup.
Generate shade and tint scales from any base color — 10-step ramps for design systems. Build hover states systematically — free, local, no signup.
Generate valid robots.txt with user-agents, allows, disallows, and sitemap lines. Never accidentally deindex with Disallow: / — local generation, free, no signup.
AWS security-group rules, Nginx allow/deny blocks, Apache htaccess, and plain CIDR lists. One input list, every syntax.
Combine static office CIDRs with VPN egress ranges in one list. Dynamic home IPs need DDNS or tailscale instead of allowlisting.
Yes in Nginx/Apache (first match wins): allows before final deny-all. The generator orders correctly — verify after pasting.
No — generation runs locally in your browser. Infrastructure details never leave your device.
CIDR Calculator
Convert CIDR prefixes to masks, ranges, and host counts — /8 through /32 decoded. Answer 'how many IPs in a /22' instantly — local math, free, no signup.
Subnet Calculator
Compute subnet masks, network/broadcast addresses, and usable host ranges from any CIDR. Plan a /24 office network correctly — local math, free, no signup.