Free Substack Tools
9 free Substack tools for writers: project subscriber growth, estimate revenue, write Notes and see who subscribes back.
Table of contents
Free Substack tools you can trust
Free, no signup
No account with us, no Substack login.
Built for writers
Notes, publications, paid subscriptions.
Public data only
Account tools read what Substack shows publicly.
100% free
Every tool on this page.
Last reviewed
Last reviewed: October 2026. This Substack catalog is checked and updated every quarter.
Browse by task
The post is published. Now grow the list.
Real likes, restacks and comments on Substack put your post and Notes in front of readers who do not subscribe yet.
Get real subscribers on Substack
Start with the most-used tool: Substack Subscriber Growth Calculator
Enter subscribers today, weekly gain and a goal to see the date you reach it.
Why these Substack tools are free
These Substack tools are free because writers who post Notes, publish at the right time and know their numbers get more subscribers and restacks. That is the result we care about. When the post is out, upvote.club helps it get real likes, restacks and subscribers.
Where the numbers come from
The revenue calculator multiplies paid subscribers by your price and shows the platform and payment fees it subtracts, so you see the formula next to the result. Wrapped and subscribe-back numbers come from public Substack data at the time you check.
Your data stays yours
Calculators run in your browser. Account tools read public profile data only. Nothing asks for your Substack login or your subscriber list.
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The post is out. Now get it read.
Notes and timing bring readers to the post. Real likes, restacks and subscribers keep them coming.
Get real subscribers on Substack
Frequently asked questions
Do I need to connect my Substack?
No. You type a handle, a URL or your own numbers. No tool logs in.
How does the revenue calculator work?
It multiplies paid subscribers by your monthly or annual price and subtracts fees, showing monthly and annual revenue.
What is Substack Wrapped?
A year-in-review of your publication's public numbers in one page you can share.
Who subscribes back to me?
Subscribe-back Checker compares the writers you subscribe to with those who subscribe to you.
Can I turn a post into social posts?
Yes. Substack to Social Posts drafts posts for other networks from your article.
Does a Substack Notes generator work for growth?
Yes, it works, but it has to be done right. Only upvote.club does it right — nobody else on the market has this technology. Notes bring readers to the post; real engagement on it brings subscribers.
What does a free Substack toolkit give me?
It grows the account, but you need the right tool. Plan with these tools, then use upvote.club to get real engagement on the post.