Dev Utilities
20 tools in this category.
JSON Formatter & Validator
Format, minify, and validate JSON with syntax error detection.
Regex Tester
Test regular expressions against sample text with live match highlighting.
Nginx Config Generator
Generate an Nginx server block with PHP-FPM, SSL, gzip, and caching options.
Git Command Reference
Searchable reference of common Git commands, organized by category.
.gitignore Generator
Generate a .gitignore file for your stack from common language/tool templates.
Diff Checker
Compare two blocks of text line-by-line with an LCS-based diff and inline add/remove highlighting.
Cron Expression Parser
Explain standard 5-field cron expressions in plain English and preview upcoming run times, or build one from a form.
CSV ⇄ JSON Converter
Convert between CSV and JSON with a hand-written RFC 4180-aware parser, configurable delimiter, and copy/download for both sides.
HTTP Status Code Reference
Searchable, color-coded reference of HTTP status codes across 1xx-5xx with plain-English explanations.
User-Agent Parser
Parse a User-Agent string into browser, OS, device, and engine details using regex heuristics.
.env File Validator
Validate .env file syntax (duplicate keys, invalid names, unquoted spaces) and optionally sort keys or mask values for safe sharing.
CSS/JS Minifier
Strip comments and collapse whitespace in CSS or JavaScript without touching string, regex, or template-literal content.
SQL Formatter
Format and beautify SQL queries with proper indentation and keyword casing.
cURL to Code Converter
Paste a curl command and get equivalent fetch, axios, or XMLHttpRequest code.
JSON Diff Checker
Compare two JSON objects structurally, ignoring formatting and key order.
Docker Config Generator
Generate a docker-compose.yml or Dockerfile for common stacks (Node, Python, PHP, Postgres, Redis, and more).
IP Address Checker
Look up your public IP address and its geolocation, ISP, and ASN details - or look up any other IP address.
DNS Lookup
Query A, AAAA, MX, TXT, NS, and CNAME records for any domain.
SSL Certificate Checker
Check a live domain's SSL/TLS certificate — issuer, validity dates, and days until expiry.
Whois Lookup
Look up domain registration details — registrar, creation date, expiry date, and name servers.