DNS Lookup Tool

Query A, AAAA, CNAME, MX, TXT, NS, SOA, and PTR records for any domain. Results come from Cloudflare's public DNS-over-HTTPS API — fully client-side.

A record: Maps a domain to an IPv4 address. This is the most common DNS record.
Share this tool: X / Twitter LinkedIn

Related Products

on Gumroad
⚡ $29

Developer Productivity Bundle

Battle-tested automation scripts, CLI tools, and CI/CD workflows. Git cleanup, Docker pruning, log analysis, GitHub Actions CI, pre-commit hooks, and more.

Buy on Gumroad →
🤖 $19

AI Prompt Engineering Toolkit

Production-ready prompt templates, chain-of-thought workflows, and API integration code for GPT-4, Claude, Gemini, and any instruction-following LLM.

Buy on Gumroad →
🛠️ $19

Developer Productivity Toolkit

Complete dev environment setup: VS Code settings, keybindings, snippets, shell aliases, Git hooks, tmux config, and Starship prompt. Copy, paste, code faster.

Buy on Gumroad →

More Free Tools

JSON Formatter Base64 Encode / Decode Password Generator Regex Tester Markdown Preview API Request Builder Regex Playground Cron Expression Generator Git Command Builder Docker Compose Generator UUID Generator Hash Generator

Related Articles

Mar 21, 2026 · 11 min read

Environment Variables Best Practices: A Developer's Complete Guide

Master environment variables: how to use them correctly, avoid common security mistakes, manage secrets across environments, and implement .env best practices in any stack.
Mar 21, 2026 · 13 min read

API Rate Limiting: Strategies, Algorithms, and Free Tools

A complete guide to API rate limiting in 2025: Fixed Window, Sliding Window, Token Bucket, and Leaky Bucket algorithms explained, with implementation in Node.js, Python, and Go, Redis-based distributed limiting, and client-side backoff strategies.
Mar 21, 2026 · 9 min read

Best Free JWT Decoder Tools in 2026

Compare the best free JWT decoder tools available in 2026. Decode, inspect, and debug JSON Web Tokens without leaving your browser—no installation required.

Get weekly developer tips

Tool guides, productivity playbooks & AI tricks. Free. No spam.

DevPlaybook Pro 7 days free

Unlock AI-Powered Dev Tools

  • ⚡ AI Code Review, Doc Generator & SQL Builder
  • ⚡ All premium templates & early access
  • ⚡ Member discounts on Gumroad products
Start Free Trial →

$9/mo after trial · Cancel anytime

Want the full toolkit?

Get DevPlaybook Pro

Every template, guide, boilerplate, and automation script in one bundle. 13 premium products — grab them all at once and save big.

$79
$241 separately Save $162 (67% off)
Get DevPlaybook Pro — $79 →

MIT licensed · Instant download · No subscription

See what's included → Browse all deals →