Utilities

Free infrastructure checks in the browser. Search by name, filter by category, and sort by popularity.

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Nginx Config Analyzer

Parse nginx.conf: AST, location, proxy_pass, upstream — browser-only.

DevOpsWeb

Webhook Tester

Temporary public webhook inbox with TTL and header redaction.

WebDevelopment

Port Checker

Point TCP port check from the Runstack network.

Network

Subnet / IP Calculator

IPv4/IPv6 networks, split, VLSM and planner summary.

Network

DNS Checker

DNS records, TTL and resolver comparison.

Network

Email DNS Checker

MX, SPF, DMARC, DKIM and PTR/FCrDNS for a mail domain.

NetworkEmail

SSL/TLS Checker

Certificate, modern TLS and a plain checklist — without noisy N/A.

NetworkSecurity

Cron Builder / Parser

Parse cron, next runs, timezone and schedule comparison.

DevOps

Systemd Analyzer

Analyze .service/.timer: dependencies, ExecStart, timers — browser-only.

DevOps

Password Generator

Cryptographically strong passwords and passphrases. Generated entirely in the browser.

Security

JWT Inspector

Local JWT inspect: header, payload, claims. Decode ≠ Verify.

SecurityDevelopment

IP / ASN Lookup

IP classification, PTR/FCrDNS, origin ASN, RDAP and basic RPKI.

Network

HTTP Inspector

Status, redirects, headers, cache, cookies and TLS summary.

WebNetwork

Docker Compose Validator

Validate compose.yml: Compose Spec structure and semantics — browser-only.

DevOpsDevelopment

Hash / HMAC

SHA-256/384/512, SHA-1, MD5, HMAC and checksum verify — browser-only.

SecurityDevelopment

Regex Tester

JavaScript RegExp: highlights, groups, replace/split, worker timeout. Not PCRE.

DevelopmentSecurity

CORS Checker

Actual + preflight CORS: Origin, Methods, Headers, Credentials — why the browser allows or blocks.

WebSecurityDevelopment

Base64 / URL Codec

Base64, Base64URL, URL and form-urlencoded encode/decode — browser-only.

DevelopmentWeb

JSON / YAML

Format, validate, JSON↔YAML, tree and structural diff — browser-only.

DevelopmentDevOps

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