How to Save Substack Newsletters as Markdown

Substack has become the home for independent writers, analysts, and journalists. But newsletter content is ephemeral --- it sits in your inbox or behind a paywall, hard to search and easy to lose. Here’s how to save Substack posts as clean Markdown.

Why Save Substack Newsletters as Markdown?

Newsletter content has unique challenges:

• Buried in email --- important essays get lost in your inbox
• No search across newsletters --- can’t search across multiple Substack authors
• Paywalled content --- paid posts aren’t easily accessible later
• No offline access --- web posts require internet

Saving to Markdown creates a personal, searchable newsletter archive.

What Save Captures from Substack

Post Content

• Full article text with formatting
• Headings and subheadings
• Block quotes and pull quotes
• Images and captions
• Embedded links
• Footnotes

Metadata

• Post title
• Author name
• Publication date
• Newsletter name

Example Output

# Why Every Developer Should Write

**Author:** Sarah Chen
**Newsletter:** The Developer's Playbook
**Published:** March 15, 2026

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Writing is the most underrated skill in software engineering.
Not documentation. Not commit messages. I mean writing for
an audience outside your team...

## The Compound Effect of Publishing

When you publish consistently, three things happen:

1. **You clarify your thinking** — writing forces precision
2. **You build a network** — readers become collaborators
3. **You create leverage** — one article can reach thousands

> "The best time to start writing was five years ago.
> The second best time is today."

Use Cases

Building a Reading Library

• Save the best newsletters across all your subscriptions
• Organize by topic, not by author or publication date
• Create a personal knowledge base from newsletter insights

Research and Writing

• Collect expert perspectives on a topic
• Save data points and analysis from industry newsletters
• Build source material for your own content

AI-Powered Learning

• Feed saved newsletters to AI for summaries and synthesis
• Ask Claude to compare perspectives across multiple authors
• Extract key insights from months of newsletter content

Archiving Paid Content

• Save paid newsletter posts you’ve already accessed
• Build an offline archive of your paid subscriptions
• Never worry about losing access if you unsubscribe

Tips for Best Results

1. Open the web version --- save from the Substack website, not the email
2. Works on paid posts --- if you can see it in your browser, you can save it
3. Comments excluded --- Save extracts the article, not the comment section
4. Podcast show notes --- for Substack podcasts, saves the show notes and transcript if available

Get Started

Install Save from the Chrome Web Store --- build your newsletter archive.

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Have questions? Reach out at [email protected]