DevTools Logo

TXT Record & SPF/DKIM Checker

TXT Record & SPF/DKIM/DMARC Inspector

Inspect TXT records and audit SPF, DKIM, and DMARC email authentication security policies.

Security Audit Target

Enter domain and optional DKIM selector

Lookup `selector._domainkey.domain.com` for DKIM public keys.

    Related guides

    TXT Records: SPF, DKIM, and DMARC Guide

    Learn how TXT records support SPF, DKIM, and DMARC email authentication and domain security.

    Related tools

    API Mock Server

    Define mock REST routes and intercept fetch calls client-side

    Bandwidth Calculator

    Estimate how long a file takes to transfer at a given connection speed — correctly handling bits vs bytes (Mbps vs MB/s) and SI vs binary size units

    Broken Link Checker

    Extract http(s) links from pasted HTML and check them via proxy

    cURL to Code Converter

    Convert cURL commands to code snippets in multiple languages. Parse cURL and generate JavaScript, Python, PHP, and more.

    DNS Lookup Tool

    Query DNS records and resolve domain names to IP addresses

    DNS Propagation Checker

    Compare DNS answers from global public resolvers and see propagation consensus instantly