Introduction

Standard Notes is a free, open-source, and end-to-end encrypted notes app available on Mac, Windows, iOS, Android, Web, and Linux. Get started with a free account at app.standardnotes.org or learn more at standardnotes.org. 🙂


In December 2019, I joined the team as a Technical Writer. My role was to maintain the technical documentation and to research and learn concepts in privacy, security, and technology, and explain them in simple, digestible articles. I also wrote blog posts to provide useful information and commentary and to market Standard Notes.

My articles are located at standardnotes.org/knowledge and blog.standardnotes.org. They are also linked below.

In February 2021, my titled changed to Software Engineer. My contributions to public repositories are available at github.com/theodorechu.

In May 2021, I stopped working at Standard Notes to join Roblox.


I developed multiple unofficial front-end extensions while working at Standard Notes. My unofficial editors for Standard Notes are available for free and licensed under AGPL-3.0-or-later. The source code for each is available on GitHub. The most popular of my editors is called the Append Editor. The Append Editor has been downloaded thousands of times since November 2020 when the counting started. You can try it at demo.appendeditor.com and read more about it at appendeditor.com.

  • Append Editor (demo, docs) - Write GitHub Flavored Markdown via four different editing modes: Plain Textarea with spell check, in-line formatting provided by CodeMirror, what-you-see-is-what-you-get live formatting provided by the Rich Markdown Editor developed by Outline, and in-line syntax highlighting provided by the Monaco Editor. In addition to GFM, the Plain Textarea, CodeMirror, and Monaco modes support KaTeX, table of contents, footnotes, in-line HTML, and emoji codes. The Monaco mode also supports autocompletion, search and replace, and syntax highlighting for over 60 programming languages. The Append Editor has built-in support for printing notes and per-note font sizes, font families, and custom CSS.
  • Flashcard Editor  (demo, docs) - Study flashcards in private with KaTeX and Markdown.
  • Marp Editor  (demo, docs) - Create presentation slides with Marp and Marpit Markdown.
  • Music Editor (demo, docs) - Write music with VexTab and VexFlow.
What is Encryption? — Knowledge Base | Standard Notes
Encryption is the process of transforming readable text or data, called plaintext, into unreadable code called ciphertext. After the data is transformed, it is said to be encrypted. The reverse transformation process from cip...
What is End-to-End Encryption? — Knowledge Base | Standard Notes
End-to-end encryption is a system of encryption that allow parties to communicate in a way that severely limits the potential for third-parties to eavesdrop on or ta...
What is Electron? — Knowledge Base | Standard Notes
Electron is an open source software framework that software developers can use to create desktop apps that work across Windows, macOS, and Linux operating systems. Background: Each operating system can only run apps written in...
What is DNS-over-HTTPS? — Knowledge Base | Standard Notes
In February 2020, the Mozilla Foundation announced that it would enable DNS-over-HTTPS by default for all
What is Free and Open-Source Software? — Knowledge Base | Standard Notes
Software programs, like other creative works, are released to its users under certain terms and conditions called licenses. When a license gives its users the rights/freedoms to use, study, copy, modify, improve, and redistribute it, then the software ...
What is a pull request? — Knowledge Base | Standard Notes
One of the main ways software developers contribute to free and open-source projects is by creating pull requests to fix bugs, ad...
Encrypted, Ephemeral Customer Service at Standard Notes
We offer end-to-end encrypted, ephemeral customer service so you can be honest with us without worrying about leaving a permanent mark on the internet.
What are LaTeX, TeX, and KaTeX?
The standard typesetting for math is TeX, and KaTeX is the fastest way to print it on the web. With Standard Notes and KaTeX, you can type math on all your devices.
How to block ads and trackers in Safari for iOS
Blocking ads and trackers is easy on desktop browsers thanks to extensions like uBlock Origin and Privacy Badger. On iOS, we can use apps like Firefox Focus, Better Blocker, and Adblock Pro.
Encryption is for Everyone
Attempts to limit access to encryption are attempts by the economic and political elite to further undermine the power of normal people.
Standard Notes as a Holiday Gift
A subscription to Standard Notes Extended is a wonderful and thoughtful gift for your friends, family, colleagues, and loved ones. The reasons are simple: you can use it to write about almost anything, anywhere, anytime, and for as long as you want.

Get in Touch

Feel free to contact me regarding these articles. I love to hear from readers. My contact information is available on my contact page.