You finish a semester with a notebook full of derivations, and now you need them in a document. Typing prose back in is tedious. Typing math into Word is worse, because every fraction, subscript, and integral means another trip to the equation editor.
Here's how I'd convert handwritten notes and math PDFs into editable Word files with the tools on Toolghar, how to capture pages so the output is clean, and what to check before you trust it.
#First, decide what kind of notes you have
The right tool depends on what's on the page.
Mostly text. Lecture notes, meeting notes, a journal, an interview written by hand. Use Handwriting to Text. It gives you plain text you can copy or download as a .txt file, then paste into Word and format. If your notes aren't in English, the Handwriting OCR page lists 140+ supported languages, and there's a dedicated Hindi handwriting to text tool.
Text mixed with math. Problem sets, derivations, physics or engineering lecture pages. Use Math to Word. It reads the whole page, text and equations together, and gives you a .docx where the equations are real Word equations.
A single equation. If you already have a Word document and only need one formula in it, use Equation to Word. It gives you MathML, which you paste into Word through Insert > Equation.
| What's on the page | Tool | What you get |
|---|---|---|
| Handwritten prose | Handwriting to Text | Plain text (copy or .txt) |
| Prose plus equations | Math to Word | .docx with editable equations |
| One equation | Equation to Word | MathML to paste into Word |
| Math for a LaTeX document | Image to LaTeX | LaTeX source |
If you write in LaTeX rather than Word, Image to LaTeX is the better fit, and LaTeX to Word covers the case where you need both.
#Why general OCR mangles math
Standard OCR reads left to right, one line at a time. Math doesn't sit on one line. A numerator is above its denominator, an exponent is small and raised, and an integral has limits above and below the sign.
Flatten that and ∫₀¹ x² dx comes out as something like "J0 1 x2 dx". The characters are nearly right and the meaning is gone.
Math to Word works differently. It first reads the page into LaTeX, which is a notation built to describe that structure, and then converts the LaTeX into a Word document. That's why fractions, powers, sums, and matrices arrive as proper equations instead of a string of characters.
#Step by step
#1. Capture the page properly
This step decides most of your accuracy.
- Lay the page flat. A curled notebook page bends the lines.
- Shoot straight down, not at an angle.
- Use daylight or a bright, even lamp, and keep your own shadow off the page.
- Fill the frame with the page, leaving a small margin.
A phone scanner app helps a lot. The document scanner in the iPhone Notes app or the scan option in Google Drive on Android will straighten the page and boost contrast for you.
#2. Split long PDFs
Both tools take images or PDFs up to 10 MB per file. A 40-page scanned notebook is better handled as several smaller files, a few pages each. Use Split PDF to break it up, or PDF to Image if you want to check pages individually. Smaller files finish faster, and if one page comes out badly you only redo that page.
Math to Word accepts several files in one go and converts each separately, so splitting doesn't add work at the upload step.
#3. Convert
Upload and let it run. Math to Word gives you one .docx per file. Handwriting to Text shows the text on screen for you to copy or save.
#4. Proofread against the original
Open the result next to your photo and read it once. Look for:
- Digits that look alike in handwriting: 1 and 7, 4 and 9, 5 and S.
- Subscripts and superscripts, especially where x₂ could be read as x2.
- Symbols that look alike: u and v, x and ×, a and α.
- Abbreviations, names, and notation specific to your subject.
On a clean page this takes a couple of minutes. That's still far quicker than typing a page of equations.
TIP
[!TIP] If you plan to convert notes regularly, a few writing habits help: cross your 7s and z's, give 1 a flat base, make 0 and O clearly different, and leave a little space around fractions and exponents.
#A worked example
Take a photographed physics lecture page. It has the heading "Simple harmonic motion", two lines of explanation, then:
x(t) = A cos(ωt + φ)
v(t) = -Aω sin(ωt + φ)
T = 2π √(m/k)
The period formula at the bottom has a box drawn around it.
Run it through Handwriting to Text and the heading and sentences come out fine, but the equations become plain characters on a line. Readable, not editable as math.
Run it through Math to Word and the heading and sentences come through as normal paragraphs, while each formula becomes a Word equation. Click into the period formula and you can change m to m_eff in the equation editor like any equation you typed yourself.
The box around the result won't survive. That's typical. Boxes, arrows between lines, and margin notes are where the output differs most from the page.
#Common problems and fixes
#Diagrams and graphs are missing
The converter extracts text and math, not drawings. Free-body diagrams, circuit sketches, and graphs usually appear as a short bracketed description instead. Crop the diagram out of your photo and insert it into the Word file as an image.
#Two columns got mixed together
If you wrote in two columns or squeezed notes into the margin, lines can interleave. Crop each column into its own image and convert them separately.
#Crossed-out work shows up
OCR tries to read everything, including lines you struck through. Delete them in Word afterwards, or cover them before scanning if there are a lot.
#Faint pencil
Light pencil on cream or recycled paper has very little contrast. A scanner app's black-and-white mode helps. If a section is still unreadable, go over it in pen first.
#Multi-line derivations split apart
Steps aligned on the = sign sometimes come through as separate equations. They're still editable. Realign them in Word if the layout matters.
#Equations came out as plain text
You probably used Handwriting to Text on a math page. Run the same file through Math to Word instead.
For tables of numbers in your notes, Image to Excel will give you a much more usable result than a Word table.
#What accuracy to expect
I won't give you a percentage, because it depends almost entirely on the input. Roughly:
| Input | What to expect |
|---|---|
| Neat print, flat page, good light | Very little to fix |
| Neat cursive, good light | Light proofreading |
| Average handwriting | A few fixes per page |
| Messy, faint, or angled photo | Noticeable cleanup, consider retaking |
Printed math, like a textbook scan or lecture slides saved as PDF, is usually easier than handwriting.
#Cost and privacy
Toolghar gives you free daily credits, enough to convert a few pages at a time. Math to Word and Equation to Word use one credit per file. For a whole semester of notes there are optional one-time credit packs, no subscription required. See pricing for details.
On privacy, the Math to Word page explains how files are handled: they're sent to an AI model for extraction and aren't stored after conversion.
#Quick recap
- Prose goes to Handwriting to Text, prose with math to Math to Word, a single formula to Equation to Word.
- A flat, straight-on, well-lit capture matters more than anything else.
- Split long PDFs into smaller files.
- Proofread digits, subscripts, and look-alike symbols.
- Diagrams and boxes don't carry over, so add those back by hand.