A Substack bio generator that writes your bio in the shapes the best Substack writers use, and grades the one you have against them.
5.0(1 rating)Pull any Substack profile, or paste a bio: how it does against the best, what each line does, and better versions from its own words.
Profile link or username
The details
Style
The emoji each line opens with. Tap one to use it.
Card: photo, name and badge
How it reads now
Pull a profile or paste a bio to see its score, what each line does, and better versions.
What the best do on Substack
From 54 bios of Substack writers, each read and judged good, in September 2026.
- Their bios run 138 characters at the median, and half are between 124 and 185.
- 67% open with what they are or who they help.
- 69% say what they are.
- 22% say who they help or the result.
- 46% give proof: a number, a name or an award.
- 15% ask for 1 action.
- 0% use line breaks.
- 11% use emoji.
Real bios from the best
Public bios as they read, each read and judged good, never picked for the account's size.
This free Substack bio generator writes your bio from your own details, in the shapes the best Substack writers use, and grades the one you have.
Here's what a Substack bio is, what the best put in theirs, and how to know yours works.
What is a Substack bio?
A Substack bio is the short text on your profile that says who you are and why someone should follow you.
How to write a Substack bio
The tool above builds bios in this order and the others the best use, from your own words, each in a real Substack profile with its count and score. Or pull your profile under Improve mine for better versions of the bio you have.
How to know yours works
No tool can prove from the text alone that a bio will win followers. The checks show how yours compares with the best. The real test is your own numbers: note your profile visits and follows in the app now, change your bio, and compare 2 weeks later.
Substack Bio Generator FAQs
Questions about Substack bios? Here's what to know.
A Substack bio is the short text on your profile that says who you are, who you help and what to do next. It's the first thing people read before they follow.
You can, but styled letters like 𝗯𝗼𝗹𝗱 are math symbols, not letters: search reads them as symbols and screen readers spell them out. The tool flags them.
Pull your profile or paste your bio under Improve mine: the tool checks it against the best Substack writers, marks what each line does and writes better versions. Then check your own numbers in the app 2 weeks after a change.
Yes, the Substack bio generator is free, with no sign-up and no card.
Navid Moazzez
AI business strategist & AI OS builder
Navid Moazzez helps creators and founders master AI and build their own AI Operating System (AI OS) to automate their business and life.
Navid.me is reader-supported. When you buy through links on this site, I may earn an affiliate commission. Learn more.
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