Sidenotes

In plain words

Sidenotes is a web annotation tool that allows users to add notes and comments directly to web pages. It launched in 2014 and lets people highlight and annotate content as they browse. The service is designed for anyone who wants to save thoughts, reactions, or references while reading online material.

written from the facts on this page · September 2026

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  Page Notes Sidebar2025 · chromewebstore.google.com · ▲107

  Capture thoughts where they happen

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  Sidenote2024 · sidenoteapp.com · ▲268

  Comment and live chat on any page of the internet

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  SideNotes2025 · apptorium.com · ▲311

  A beautiful note taking app with superpowers. It shows and hides on the side of your monitor to manage your notes distraction-free. Keep your notes organised, personalised and always at your fingertips. Markdown, tasks, pictures, colors, folders included.

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  Sidenote2020 · sidenote.me · ▲97

  Timestamped notes on YouTube videos

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  SiteNotes - Ultimate Browsing Companion2024 · chromewebstore.google.com · ▲13

  Take and save notes for any website in a beautiful sidebar.

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  Sidenote AI2023 · sidenote.ai · ▲228

  AI copilot for meeting follow-up

Questions this answers

• sidenotes

• 
  SimCity, but with Permits▲877

  A free city-building game in your browser. You are the mayor. You know what the city needs. Now get it past the zoning board, the neighbors, the appeals court and the next election.

  Life & fun · 22h ago · permit.petercai.com

• IV
  I've been paying for a rural Tanzanian's education for 10 years▲778

  Life & fun · 13d ago · tanzaniaeducationproject.org

• 
  Bigwords.page – Turn any screen into a sign. The URL is the app▲728

  Turn a phone, tablet or TV into a sign. Type a message and it fills the screen: welcome signs, timers, Wi-Fi passwords and more. No app, no account, free.

  Life & fun · 14d ago · bigwords.page

• 
  Guitoro, a virtual guitar you strum with your keyboard▲573

  Play a free virtual guitar online with your keyboard or by touch. Slow songs down and see every chord, string and strum. Acoustic, classic, electric and bass.

  Life & fun · 8d ago · guitoro.com

• 
  See *almost* any carriers phone settings▲432

  Carrier settings from iPhone, Pixel and Galaxy firmware, decoded and compared: APNs, VoLTE, 5G and Wi-Fi Calling per carrier, and what each build changed.

  Life & fun · 12d ago · carrierexplode.com

• 
  The whole Solar System and every tracked satellite, live in the browser▲407

  Life & fun · 22d ago · space.bl2.net

• 
  Coolors▲1,589

  Super fast color schemes generator for cool designers

  Work · 2014 · coolors.co

• 
  Inbox by Google▲1,147

  Next generation inbox

  Life & fun · 2014 · google.com

• 
  Stock Up▲641

  The best free stock photos in one place

  Life & fun · 2014 · stockup.sitebuilderreport.com

• 
  Writefull▲511

  A tiny tool to help you write better

  Work · 2014 · writefull.com

• 
  Mattermark▲511

  Ranking 800,000+ high growth Internet companies

  Growth · 2014 · mattermark.com

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  Petit Hacks▲506

  Acquisition, retention, & revenue hacks used by companies

  Life & fun · 2014