Note-Taking App

What this tool does

This is a local Markdown note-taking app. It gives you a sidebar that lists every note you have written and an editor pane for the note you are currently working on. You can create new notes, select between them, rename them, and delete the ones you no longer need. The editor is a plain Markdown textarea, and a live preview shows the formatted result next to it. Three view modes — Edit, Split, and Preview — let you focus on writing, see both at once, or read the finished note. Every note carries a title, a body, and a last-edited timestamp, and everything you type is saved automatically to this browser.

Use cases

A lightweight notebook fits a lot of everyday situations. Use it as a scratchpad for meeting notes, where Markdown headings and bullet lists keep decisions and action items tidy. Keep a running journal or daily log, with one note per topic rather than per day. Draft blog posts, README files, or documentation in Markdown before pasting them into a larger system. Collect research links and quotes in a blockquote-friendly format. Because the app loads instantly and saves without a single click, it works well for the quick thoughts you would otherwise lose in a chat window or a sticky note on your desk.

How to use it

Start with the sample note, or click New to create a fresh one. The note opens in the editor — type Markdown in the textarea on the left and watch the rendered version update on the right. Use the view switcher to move between Edit, Split, and Preview depending on whether you are writing or reviewing. Click the pencil icon next to the title to rename a note; press Enter to save the new name or Escape to cancel. To remove a note, use the trash icon in the sidebar or the Delete button under the editor. On a phone, tap the All notes button to open the sidebar, pick a note, and the list collapses again so the editor has the full screen. When a note is worth keeping outside the browser, click Export as .md to download it as a standard Markdown file.

Privacy & your data

Your notes belong to you and stay on your device. They are saved with your browser’s localStorage, which means the data lives on this computer, in this browser, and nowhere else. There is no sign-up, no account, and no server that receives your text. The Markdown renderer is fetched on demand to keep the page fast, but it processes your content locally — your words are never transmitted.

Because the storage is tied to one browser profile, there are real limits to be aware of. If you clear your browsing data, your notes are erased along with it. Private or incognito windows usually discard their storage when closed, so notes written there will not persist. Notes do not move between browsers or devices, and there is no cloud backup. Treat this app as a private local notebook: if a note matters, export it as a .md file so you have a copy you control. That trade-off is deliberate — keeping everything local is what makes the tool private and instant.

Tips

Use a clear first heading in each note; the sidebar shows the first line of content as a preview, so a descriptive opening makes notes easy to scan. Rename notes promptly rather than leaving several called Untitled note — a good title is the fastest way to find something later. Split view is ideal while drafting formatted content, because you catch a broken list or a missing closing backtick immediately. For long documents, switch to Preview to read without the distraction of raw syntax. Export notes you depend on, and do it regularly; a downloaded .md file is small, portable, and opens in almost any editor. Finally, because everything saves automatically, you never need a save button — just write, and trust that each keystroke is already stored.