Markr — Web Highlighter & Annotator

Tracking since Apr 19, 2026.

Changelog

• Jun 6, 2026
  description

  Markr is a privacy-first web highlighter and annotation tool. Select any text on any webpage, highlight it in your color of choice, add a note, attach an image reference, and organize everything with tags — all stored locally on your device with no account required.
  Your data never leaves your browser.
  Every annotation is saved in your browser's local storage. Nothing is transmitted to any server, ever. No sign-up, no sync, no tracking.
  
  FREE FEATURES
  
  Highlight text in 4 colors (yellow, green, blue, pink)
  Add notes to any highlight
  Attach image URLs with captions
  Highlights restore automatically when you revisit pages
  Works on any http or https webpage
  Right-click → Highlight with Markr
  Up to 100 annotations
  
  MARKR PRO — $9 one-time
  Everything in Free, plus:
  
  Unlimited annotations
  Tags and tag filtering
  Full-text search across all annotations
  Sort by newest, oldest, or by page
  Export to Markdown, JSON
  Custom highlight colors
  All your annotations in one panel across every tab
  
  HOW IT WORKS
  
  Visit any webpage
  Select text you want to highlight
  Click a color in the toolbar that appears
  Click the highlight to add a note or image
  Open the side panel to see all your annotations
  
  Highlights restore automatically the next time you visit the page, even after a browser restart.
  PRIVACY BY DESIGN
  Built by ALTRU.dev ("Code for Humanity") — a portfolio of privacy-first tools for researchers, students, and anyone who values owning their own data.
  
  No account required — ever
  No analytics or telemetry
  No external servers
  Inspect your data anytime in browser DevTools
  Delete everything with one button
  Uninstalling removes all data
  
  Privacy policy: https://altru.dev/markr/privacy

  Markr is a privacy-first web highlighter and annotation tool. Select any text on any webpage, highlight it in your color of choice, add a note, attach an image reference, and organize everything with tags — all stored locally on your device with no account required.
  Your data never leaves your browser.
  Every annotation is saved in your browser's local storage. Nothing is transmitted to any server, ever. No sign-up, no sync, no tracking.
  
  FREE FEATURES
  
  Highlight text in 4 colors (yellow, green, blue, pink)
  Add notes to any highlight
  Attach image URLs with captions
  Highlights restore automatically when you revisit pages
  Works on any http or https webpage
  Right-click → Highlight with Markr
  Up to 100 annotations
  
  MARKR PRO — $9 one-time
  Everything in Free, plus:
  
  Unlimited annotations
  Tags and tag filtering
  Full-text search across all annotations
  Sort by newest, oldest, or by page
  Export to Markdown, JSON
  Custom highlight colors
  All your annotations in one panel across every tab
  
  HOW IT WORKS
  
  Visit any webpage
  Select text you want to highlight
  Click a color in the toolbar that appears
  Click the highlight to add a note or image
  Open the side panel to see all your annotations
  
  Highlights restore automatically the next time you visit the page, even after a browser restart.
  PRIVACY BY DESIGN
  Built by ALTRU.dev ("Code for Humanity") — a portfolio of privacy-first tools for researchers, students, and anyone who values owning their own data.
  
  No account required — ever
  No analytics or telemetry
  No external servers
  Inspect your data anytime in browser DevTools
  Delete everything with one button
  Uninstalling removes all data
  
  What’s new:
  Added the new Markr logo and updated extension icons.
  Improved highlight saving and restoring after page reloads.
  Improved page and annotation counts in the popup and side panel.
  Added visible note editing with a clear Save note button.
  Made Jump to highlight easier to see with a brighter flash effect.
  Made Clear page and Clear ALL controls more visible in the side panel.
  Added side panel footer links to other Altru/Dweav extensions.
  Restored the linked Developed by Altru.dev / Copyright 2026 footer attribution.
  Improved Pro upgrade behavior so the subscription prompt is closable and does not open automatically.
  Improved handling of malformed or older annotation records.
  Cleaned up packaging and removed stray files from the extension bundle.
  
  Privacy policy: https://altru.dev/markr/privacy

Permissions & access

Permissions

activeTabstorageunlimitedStoragecontextMenussidePaneltabswindows

Host access

None declared

Screenshots