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- Newsletters and podcasts

# Newsletters and podcasts: free website tools

**3 free newsletters and podcasts tools for creators and media teams growing a newsletter or podcast: NewsletterDeliverabilityKit, PodcastFeedAudit, PodcastSponsorRadar. Each runs a live, read-only scan with the full result free; fix packs and monitoring are optional.**

3 free, read-only checks for creators and media teams growing a newsletter or podcast. Run any of them on your own site; each shows a score, every check it ran and what to fix.

## [NewsletterDeliverabilityKit](/newsletterkit)

For Substack, Beehiiv, Kit, Ghost and HubSpot senders with a custom domain. We check the Google and Yahoo bulk-sender DNS requirements, recursive SPF lookup count, your email provider's includes, DKIM on 30+ provider selectors, DMARC policy, BIMI, MX, reverse DNS and public blocklists, then write a copy-paste DNS fix pack for your provider.

Free scan · fix pack $4.99, monitor from $9/mo · [try the demo](/newsletterkit#sc-form)

## [PodcastFeedAudit](/podcastfeedaudit)

A free, read-only validation of your podcast RSS feed: artwork, category, explicit flag, owner email, episode enclosures (HTTPS, length, type), GUIDs, dates, transcripts and Podcasting 2.0 tags.

Free scan · fix pack $4.99, monitor from $9/mo · [try the demo](/podcastfeedaudit#sc-form)

## [PodcastSponsorRadar](/podcastsponsorkit)

Paste a podcast RSS feed URL. We read up to 60 recent episodes' show notes and list the sponsors, promo codes, affiliate links and ad-attribution services (Podtrac, Chartable, Podsights, Magellan and others), with episode counts and last-seen dates.

Free scan · fix pack $4.99, monitor from $9/mo · [try the demo](/podcastsponsorkit#sc-form)

## Other tool groups

[AI search and AI-agent readiness](/hub/tools/ai-search-and-agents) [Technical SEO](/hub/tools/technical-seo) [Email deliverability and domains](/hub/tools/email-and-domains) [Security, privacy and trust](/hub/tools/security-privacy-and-trust) [Conversion, signup and pricing](/hub/tools/conversion-and-pricing) [Competitive and sales intelligence](/hub/tools/competitive-intelligence) [Performance and design](/hub/tools/performance-and-design) [Agencies and local business sites](/hub/tools/agencies-and-local-business)

## Frequently asked questions

### Are these newsletters and podcasts tools free?

Yes. Every scan and its full result are free. An optional fix pack (copy-paste fixes for the failing checks) and monitor plans that re-check on a schedule are paid.

### Do the tools change anything on my site?

No. They are read-only: they request public pages, files and DNS records the way a browser or mail server would, and never submit forms or log in.

### Which newsletters and podcasts tool should I start with?

Start with NewsletterDeliverabilityKit; each result page links to related checks.