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