Substack ArchiverKeeping field notes
A small habit worth keeping
A notebook does not need to be impressive. It needs to be within reach.
Start with three things
- Where you were
- What you noticed
- One question to return to
Leave room for the next observation.
Own what you wrote
Your Substack, yours to keep
A portable copy of your publication's public posts: readable HTML and editable Markdown in one ZIP, with a linked index. Free for up to 200 posts; $5 a month bundles the images, adds an EPUB and archives up to 2,000.
the selected entry, read from posts/2026-09-14-keeping-field-notes.md
Markdown source posts/2026-09-14-keeping-field-notes.md
# Keeping field notes 2026-09-14T12:00:00Z A small habit worth keeping A notebook does not need to be impressive. It needs to be **within reach**. ## Start with three things - Where you were - What you noticed - One question to return to > Leave room for the next observation.
Why a post was left out SKIPPED.md
# Skipped posts Only posts marked everyone are included. No paywalls or access controls are bypassed. This list covers only entries encountered in this run. - The members notebook: Not marked everyone (paywalled, restricted, or unknown audience); body not requested.
Make a copy of your publication
Enter the address, check what will be included, then download. Nothing is fetched until you do.
Post, time and file-size limits
Up to 200 posts reviewed, including skips. 2MB per post, 4MB archive, 4-minute budget, 3 archives an hour. A limit or an interruption produces a clearly marked partial ZIP with PARTIAL.md listing exactly what is included.
What is in the ZIP
- Every file in demo-archive.zip, the archive shown above
- index.htmlthe table of contents; open it in a browser
- README.mdwhat was included, when, and how to read it
- SKIPPED.mdrestricted titles encountered, with the reason
- archive.jsonraw post metadata and the exact included-file manifest
- posts/each public post as a standalone HTML file and as Markdown
- 2026-09-14-keeping-field-notes.html
- 2026-09-14-keeping-field-notes.md
- 2026-09-12-a-portable-bookshelf.html
- 2026-09-12-a-portable-bookshelf.md
- Restricted posts are listed, not copied
- Only posts marked for everyone are fetched. SKIPPED.md names each restricted title and the reason; PARTIAL.md explains any limit or interruption, file by file.
- No Substack login, nothing kept
- Your own publication, archived from Substack's public API without a password. Post content exists only in memory while the ZIP is built.
Keep the images, too.
Free
$0
- Up to 200 posts reviewed, newest first, as HTML and Markdown with a linked index
- SKIPPED.md and PARTIAL.md say exactly what is and isn't included
- A 4MB archive; images stay as remote URLs
Substack Archiver
$5a month
- Images from Substack's CDN bundled into the ZIP, so the archive reads offline
- An EPUB ebook of the whole publication, oldest post first
- Up to 2,000 posts (as many as fit in the 4-minute budget) and a 60MB archive
- Sign in and it unlocks, or paste your key once per device. Cancel from your account.
Questions
Is this allowed?
This tool is for archiving YOUR OWN publication's public posts. Only archive work you own or have permission to copy. We never access paywalled content, bypass access controls, or ask for your password. Substack Archiver is independent and is not affiliated with Substack.
Will it include every post?
The free archive reviews up to 200 entries, newest first, including restricted posts that are skipped; the subscription reviews up to 2,000. Both have a 2MB limit per API response and a 4-minute budget, and the archive file is capped at 4MB free or 60MB subscribed. If a limit, rate limit, or interruption occurs, the ZIP is marked partial and lists exactly what is included. Unvisited posts are not counted as exported or skipped.
Are images saved for offline reading?
In the free archive, images stay as remote URLs: they need an internet connection and may disappear if their source changes. The $5 a month subscription fetches each post's images from Substack's CDN (up to 400, 5MB each) into the ZIP and the EPUB, so the archive reads offline. Images hosted elsewhere stay as URLs. Scripts and active embeds are always removed.
What does the subscription cost, and what if I already subscribe to another Avyth tool?
$5 a month for Substack Archiver on its own, cancel any time from your account. Every Avyth tool is a $5 line on one subscription, so adding this one to an existing subscription just adds $5 to the same invoice; the Everything plan at $24 a month includes all of them.
Can I use my custom domain?
Not yet. Enter your publication's original <name>.substack.com address. We fetch only that Substack host and never follow redirects.
Do you store my writing or require an email?
Your archive is prepared in server memory and returned to you; post content is not stored or logged. No email is required for a free archive. A subscription needs an Avyth account (or a pasted licence key) so we can confirm it; our server checks that with api.avyth.com and keeps none of it.
Hear when scheduled re-archives land
Next up: scheduled re-archives and custom domains. Leave your email for one message when something new ships; nothing else.
By submitting you agree we may email you about this product. Privacy policy. We collect only what's listed there, and it stays with Avyth LLC.