Help

Quick start

• Write in the MyMath source field on the left. The page opens with a worked example you can edit or replace.
• The handwritten page appears on the right, a moment after you stop typing.
• Choose Export, then Download PDF. The file is made on your device.

The toolbar switches between Note sheet, a document of one or more pages, and One formula, a scratchpad for a single expression. Below 1024 pixels the two halves become Write and Preview tabs; on a phone the first visit opens on Preview.

Writing text

MyMath source is a small dialect of Markdown and LaTeX, not full Markdown and not a LaTeX document. It has three kinds of content: headings, paragraphs and formulas.

• A heading is a line starting with # and a space. One to six # marks work, but a sheet has a single heading style, so the level itself is not kept.
• A paragraph is one or more lines with no blank line between them; they are joined with a space. A blank line starts the next paragraph.
• Emphasis, lists, links, tables, images and footnotes are not part of the dialect. They stay on the page as the characters you typed.
• To begin a paragraph with something the dialect would otherwise read as syntax, put one backslash in front of it: \# is a paragraph, not a heading.

The source is yours: nothing is reformatted, re-wrapped or tidied behind your back, and what you typed is what is saved.

Writing maths

• Maths inside a paragraph goes between single dollar signs: $E = mc^2$.
• A formula of its own starts with $$ on a line by itself and ends with $$ on a line by itself. A short $$…$$ on one line works too.
• For a literal dollar sign in prose, write \$.

# Quadratic formula

The two roots of $ax^2+bx+c=0$ are

$$
x_{1,2} = \frac{-b \pm \sqrt{b^2-4ac}}{2a}
$$

MathJax 3 typesets the maths, so spacing, stacked fractions, superscript sizes and growing brackets are exactly what TeX gives you; only the glyphs are replaced with handwriting. Your maths itself is passed through untouched.

If the source is not valid — an unclosed $$, for example — the preview pauses, the message names the line, and the last page that worked stays on screen until you fix it. Characters the handwriting set does not have yet are drawn as an outlined box and listed under the preview.

Importing a file

Import a note sits above the editor. Paste text into it, or open a local .txt, .md or .tex file. Read as chooses how the text is understood: Plain text, Markdown or LaTeX.

• Ordinary note structure becomes headings, prose and formulas. Richer material is converted into what the dialect has.
• Whatever was simplified or left out is listed afterwards, with the line it happened on and a link that jumps there.
• If the example is still untouched, the import replaces it. Otherwise Add to sheet inserts the text after the content holding the cursor.
• The file is read on your device and is not uploaded. Photos, audio, Word and PDF files are not supported.

Appearance

Appearance is in the toolbar. It changes how the whole sheet is drawn; the settings belong to the workspace, not to a single note.

• Size and Spacing scale the handwriting. On a note sheet they can change line breaks and the number of pages.
• Unsteadiness sets how much the hand wavers; Baseline is Steady or Loose.
• Paper is Paper or Transparent and applies to PNG and PDF. Copied and cropped handwriting is always transparent.
• Ink colour offers four inks: Blue-black, Graphite, Fountain blue and Sepia.
• Reset to default puts all of it back.

New variation, under the preview, redraws the same text with a different random hand. It never moves a line break. Pages are fixed portrait pages of one size, close to A4; there is no page-size, orientation or paper-pattern choice in this release.

Your own handwriting

My handwriting is at the end of the Write pane, closed until you open it. Draw only the characters the current page uses; every character you skip keeps the built-in hand, so nothing is gated behind drawing.

• Use my hand turns your characters on and off.
• Save my hand downloads them as a file, and Restore from a file reads one back.
• Forget my handwriting deletes them from this browser.

Your characters and strokes are kept in this browser's local storage and are not uploaded. They do not follow you to another browser or device unless you move the backup file yourself.

Saving on your device

A note sheet is saved automatically in this browser, in the application's own local database. The toolbar shows whether the open note is saved. One formula is a scratchpad and is not saved.

• Saved notes opens the list: New note, Open, Delete, and Delete all saved notes.
• Back up this note downloads it as a file; Restore a MyMath note reads one back.
• While you type, your exact text is also kept as a local draft, so an accidental reload does not cost the last keystrokes. If a draft from a different version of the note is found, you choose Restore draft or Use saved note.

Notes live in one browser on one device. Clearing the site's browser storage removes them, and a browser may drop this kind of storage when space runs short, so keep a backup file of anything that matters.

Exporting

Export is the primary button in the toolbar. From a note sheet it offers:

• Download PDF — every page of the sheet as one file.
• Share PDF — where the browser and device support sharing.
• Download page PNG — the page you are looking at, at high resolution.
• Copy page handwriting, and the same as a PNG download — the ink alone, cropped and transparent.
• Copy source — the MyMath text of the sheet.

One formula offers the same in miniature: copy or download the formula image, share it, download its handwriting as a transparent PNG, or copy the LaTeX. Everything is generated on your device.

A note-sheet PDF also contains your prose and headings as machine-readable text, so the file can be searched and has an outline of its headings; formulas are drawn and are not searchable. Anyone you send the PDF to can extract that text. Search works in desktop readers such as Firefox, but not yet in iOS Files or Goodnotes. In notes apps the handwriting arrives as a page, not as editable ink.

Keyboard and the editor

The source field is a code editor. It arrives a moment after the page; until then a plain text box holds the same text, and if the editor cannot load you can keep writing in that box.

• Ctrl+F (Cmd+F) opens search; Escape closes it.
• Ctrl+Z (Cmd+Z) undoes. Ctrl+Shift+Z, Cmd+Shift+Z and Ctrl+Y redo.
• Tab leaves the editor instead of inserting a tab, so the keyboard can always move on.
• Lines wrap. Line numbers show on desktop and tablet and are hidden on phones.
• Each note has its own undo history, so undo never reaches into another note.

Messages about the source appear under the editor, and the preview names the line of an error with a link that jumps to it.

Privacy

There is no account, no cloud sync and no product backend. Your note text, formulas, imported files, handwriting and exports are processed in your browser and are not uploaded.

Loading the website itself is an ordinary web request, so the host receives normal technical request data, as with any website. Page views are counted by Vercel Web Analytics, which uses no cookies.

Separately, six anonymous product events are sent to a PostHog EU Cloud project: first_export, first_sheet_export, second_export, personalisation_started, personalisation_completed and personal_export. They carry no values of their own, and each is sent at most once per open page. No formula, note, filename, character, glyph or stroke data is ever part of them.

The full and binding description is in the privacy notice: Privacy

Current limits

• A sheet holds up to 40 pieces of content — headings, paragraphs and formulas — of up to 600 characters each. An imported file is read up to 200 kB.
• The handwriting set covers a fixed range of characters. Anything outside it is drawn as an outlined box and named under the preview.
• Maths is whatever MathJax 3 can typeset from TeX. This is not a LaTeX editor: document classes, packages, bibliographies, figures and tables are not supported.
• Pages are one fixed portrait size. There is no page-size, orientation or paper-pattern choice yet.
• Notes and handwriting live in one browser on one device; moving them means taking a backup file, not syncing.

Questions