Stonewren

Small, single-purpose browser tools.

Stonewren makes focused Chrome extensions that do one thing well. Each one keeps your data on your own device, asks for the fewest permissions it needs, and never sells or shares your personal information.

Extensions

The first tools are on the way. Check back soon.

Principles

Local-first: your data stays in your browser unless a feature clearly requires otherwise.
Least privilege: minimal permissions, explained in each extension's listing.
No surveillance: only anonymous usage events, never the content you work with.
Manifest V3, no remotely hosted code.