Online Security
Privacy & SecurityFreemium
Powering your web experience with a reliable, endpoint protection layer.
3.6594 reviews11M+
View Extension
CodiMD Book mode
Display a sidebar like HackMD book mode
By CodiMD Book mode
Free
Updated 2026-09-03CodiMD Book mode screenshots
Overview
## Disclaimer * This extension is NOT developed by HackMD team. * I develop this extension for personal use. There may be undiscovered defects. Please think twice before use. ## Requested Permissions * webRequest Read security headers related to iframe * declarativeNetRequest Modify found security headers to make functionality working ## Notice * Hostname must contains hackmd or codimd; otherwise, this extension will not enable book mode. In the other words, if you host CodiMD without domain name, this extension is not for you. ## How to use? 1. Install extension 2. Open your note for book index (e.g. https://codimd.your.domain/note) 3. Add `book` to query string (e.g. https://codimd.your.domain/note?book) 4. Enjoy it ## Difference between this extension and HackMD * Links will be opened in new tab * HackMD * [target=_blank] is added explicitly * Starts with http (non-SSL) * This extension * [target=_blank] is added explicitly * Cross-origin
Pricing
CodiMD Book mode is free. There is no paid tier to consider.
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View ExtensionFrequently asked questions
Is CodiMD Book mode free?
Yes, CodiMD Book mode is free to install and use.
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