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Network & DevOps

CIDR, HTTP headers, User-Agents, curl, OpenAPI, and docker-compose — 100% browser, no outbound calls.

Calculate CIDR ranges, decode HTTP headers, validate docker-compose or OpenAPI schemas — without leaving the browser or exposing your configs.

8 tools available

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CIDR Calculator

100% local

Compute network, broadcast, hosts, subnet mask and subnet splits from a CIDR notation. IPv4 + IPv6, with membership checker.

Utiliser →

HTTP Headers Decoder

100% local

Paste HTTP response headers: CSP, Cache-Control, HSTS, Set-Cookie, Authorization — explained directive by directive. No outbound calls.

Utiliser →

User-Agent Parser

100% local

Paste any User-Agent: browser, OS, device. Bulk mode with CSV export and bot/crawler detection. 100% browser. Free online tool — privacy level clearly shown.

Utiliser →

curl Command Builder

100% local

Build a curl command visually then export to fetch JS, axios or Python requests. Reverse-imports an existing curl command.

Utiliser →

DNS Lookup

New

100% local

Query public DoH resolvers from your browser, compare Cloudflare and Google, and display TTLs. 100% client-side. Free online tool — privacy level clearly shown.

Utiliser →

docker-compose Linter

100% local

Lint docker-compose.yml: syntax, volume/network refs, healthchecks, mem_limit, 'latest' tags. Best practices with line numbers. 100% local.

Utiliser →

OpenAPI Validator

100% local

Validate OpenAPI 3.x or Swagger 2.0 specs: structure, paths, components, security. Stats and JSON export. 100% local. Free online tool — privacy level clearly…

Utiliser →

Nginx Config Generator

New

100% local

Generate a secure Nginx config with reverse proxy, SSL, gzip, cache headers, rate limiting and CORS. 100% local. Free online tool — privacy level clearly shown.

Utiliser →