DNS Lookup Documentation & Guide

Overview

DNS Lookup is an easy and free online tool that runs in your browser.

Look up DNS records (A, AAAA, MX, TXT, CNAME, NS, SOA) for any domain instantly. Free online DNS query and diagnostic tool for network administrators, developers and IT professionals.

This documentation explains what the tool is for, what inputs it supports, and practical step-by-step usage so the page remains searchable and useful.

Tip: start with a small sample to validate settings before processing large files.

What you can do with this tool

Key capabilities (based on the actual UI and code):

• Runs in your browser (local-first)
• May send network requests depending on your inputs

Inputs & supported formats

This tool may accept text input and/or files depending on the UI.

Folder selection is not detected in the UI.

No external vendor libraries detected from the HTML includes.

How to use (step-by-step)

1) Open the tool page.

3) Provide input (text / options / files).

6) Run the main action and review the output/preview.

7) Copy / download / export the result.

Privacy, offline & limitations

Local-first by design: whenever possible, processing happens on your device.

No registration is required. Avoid pasting secrets or private data on shared devices.

This tool appears to perform network requests in some flows; make sure you trust the endpoints you call.

No WebWorker usage detected.

Troubleshooting

If the tool does nothing: check required inputs/options and try a smaller sample.

If a file fails to load: confirm the file type is supported and retry with a smaller file.

If a request fails: check CORS/auth/network connectivity and verify the URL.

FAQ