Substack Tool Guide
Updated July 2026
Substack is a publishing platform for newsletters, posts and subscriber emails. PromptDC Desktop rewrites selected Substack text in any browser, and the Chrome extension rewrites editable fields on substack.com.
Substack tool guide
Rewrite prompts in place inside Substack.
Works everywhere
PromptDC Desktop works in any app on Mac or Windows. The Chrome extension covers any website.
In-Place Rewrites
Transform rough notes into clear, structured instructions instantly.
Why Use PromptDC with Substack?
What changes when you rewrite prompts with PromptDC inside Substack.
Desktop Newsletter Rewrites
Select Substack text in any browser and open a rewrite with the desktop shortcut.
Better Subject Lines
Rewrite vague subjects so readers know what the newsletter contains.
Personal Voice Rules
Use a custom profile to retain your tone, wording habits and boundaries.
Polished Newsletter Copy
Correct grammar and awkward phrasing while keeping your intended meaning.
Focused Passage Review
Review and adjust each selected passage before replacing it.
Cross-Language Editions
Choose the output language, or use Auto to match the selected passage.
Before and after prompts for Substack
See how specific context, constraints, and outcomes turn a rough request into a prompt Substack can act on.
Clarify the subject line
Before PromptDC
Subject: Some thoughts from this week
After PromptDC
Subject: What 20 customer calls changed about our roadmap A specific look at the assumption we dropped, the signal we nearly missed and what we are testing next.
Why this is better: The Email profile made the subject specific and added preview copy that sets an honest expectation.
Open a personal edition
Before PromptDC
Hi everyone, sorry this is late. It's been a busy week and I have a few updates.
After PromptDC
Hello, This edition is a day late because I spent Tuesday rewriting a plan I thought was finished. That detour exposed a useful mistake: I had designed the work around our calendar, not our customers.
Why this is better: The Social profile kept the personal admission but gave the introduction a clear reason to continue.
Tighten a closing note
Before PromptDC
Anyway thanks for reading and let me know what you think about all this stuff.
After PromptDC
Thanks for reading. I would like to know how your team handles this decision: one annual plan, or smaller bets throughout the year? Reply and tell me what has worked, including what failed.
Why this is better: The Concise profile replaced a vague sign-off with one focused question readers can answer.
Frequently Asked Questions
Learn shortcuts & usage?
Read the shortcuts docs
Need assistance with Substack?
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