Sidemark
Comment and leave notes directly on any webpage.
What is Sidemark?
Sidemark lets you read and leave comments on any website — news articles, YouTube videos, product pages, blog posts, and more. Comments are shared across all users, so when you visit a URL, you see what others have written — and they'll see yours. Share your thoughts on a specific Netflix scene, leave notes on a blog post, or collaborate on a project. It turns the entire web into an interactive comment section.
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