The Chrome Web Store summary limit
A Chrome extension's summary comes from the description field in its manifest, which allows up to 132 characters. It shows under the extension name in the Chrome Web Store, in search results and on the install page.
How to write a Chrome Web Store summary
Describe the one job the extension does and where it works. The store has a separate detailed description for features and a changelog, so the summary only needs to win the click.
Questions
What is the Chrome Web Store summary character limit?
132 characters. It is the manifest description field.
Where does the Chrome Web Store summary come from?
From the description field in manifest.json; the store shows it as the summary.
Is there a separate long description?
Yes. The detailed description is set in the developer dashboard and has a much larger limit.
Do spaces and emoji count?
Spaces and punctuation count as one character each. This checker counts each visible character once, so an emoji counts as one.
Is my text stored or sent anywhere?
No. The counting happens in your browser and nothing is uploaded.