ChatGPT LaTeX fixer: make ChatGPT math render in Obsidian and GitHub

Q: Why doesn’t ChatGPT’s LaTeX render in Obsidian?

Obsidian renders maths between $ (inline) and $$ (display), and ChatGPT writes $ … $ and \[ … \] instead. The LaTeX inside is usually fine; only the wrapping differs. Converting the delimiters to $ makes it render. GitHub, Jupyter and VS Code’s Markdown preview follow the same $ convention.

Q: Will it change dollar amounts or code?

No. A single $ only counts as maths when it hugs the formula on both sides and is not followed by a digit, so “$5 and $10” stays as prices. Anything inside backticks or a fenced code block is never touched.

Q: How do I get ChatGPT equations into Word instead?

Press Word .docx here, or use ChatGPT to Word for a whole reply. Both turn each formula into a native Word equation that you can click into and edit, not an image.

Paste a reply and every  and \[ \] becomes $ and $$ — or the other way round. Each formula is checked, and the broken ones are flagged with the reason.

Every  and \[ \] converted, every formula checked. Runs in your browser.

Convert to

For Obsidian, GitHub, Jupyter and VS Code.

From ChatGPT

Converted

The quadratic formula gives the roots $x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}$, which are real when $b^2 \ge 4ac$.

The area under $y = x^2$ from 0 to 1 is

$$
\int_0^1 x^2\,dx = \frac{1}{3}
$$

and Euler's identity is $e^{i\pi} + 1 = 0$.

A formula ChatGPT cut short: 
$$
\frac{a}{b
$$

Formulas

$x = \frac{- b \pm b ^{2} - 4 a c}{2 a}$
Renders, inline
$b^{2} \geq 4 a c$
Renders, inline
$y = x^{2}$
Renders, inline
$\int_{0}^{1} x^{2} d x = \frac{1}{3}$
Renders, display
$e^{iπ} + 1 = 0$
Renders, inline
\frac{a}{b
Unexpected end of input in a macro argument, expected '}'
Needs fixing, display

What changed

4inline  → $ $
2display \[ \] → $$ $$
1formula needs fixing

Converted in your browser. Code blocks and prices like “$5” are left alone.

Copy a maths answer out of ChatGPT and paste it into Obsidian, a GitHub README or a Jupyter notebook, and the formulas do not render. You see $x^2$ instead of x². The reason is a delimiter mismatch, not broken LaTeX: ChatGPT wraps inline maths in $ … $ and display maths in \[ … \], while most Markdown tools only look for $ … $ and $$ … $$. The formula inside is fine.

This fixer rewrites the delimiters and nothing else. Inline formulas get single dollars, display formulas get $$ on their own lines, and code blocks and prices such as “$5” are left exactly as they were. Switch the target to $ … $ to go the other way, for a LaTeX document or Overleaf. Every formula is also rendered in a list underneath. If ChatGPT cut one short or left a brace open, it is flagged in red with what is wrong, so you fix it before pasting.

How the LaTeX fixer works

1.
Paste the reply. Copy it with ChatGPT’s Copy button so the LaTeX comes across as written. Formulas are found wherever they are — inline, on their own lines, in lists and tables.
2.
Pick the target. $ … $ for Obsidian, GitHub, Jupyter and VS Code. $ … $ for LaTeX documents and Overleaf.
3.
Check the list. Each formula is rendered with KaTeX. A red flag means it will not render anywhere until it is fixed, and says why — usually an unclosed brace or an unknown command.
4.
Copy, download or publish. Copy the converted text, download a .docx with real Word equations, or publish a page with every formula typeset.

A real example

A maths student keeps lecture notes in Obsidian and asks ChatGPT to explain the quadratic formula. The answer has four inline formulas and a display integral, all in ChatGPT’s \( and \[ style. Pasted into a note, they show up as raw backslashes.

They paste the reply above with $…$ selected. The converted text on the right reads $x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}$ , and the integral now sits between $$ lines. In the formula list, five formulas render with a tick. The sixth, \frac{a}{b, has a red flag: “Unexpected end of input in a macro argument, expected '}'” — ChatGPT stopped mid-formula and never closed the denominator.

They add the missing brace in the left pane, the flag turns into a tick, and they press Copy text. Pasted into Obsidian, every formula renders. For a printed handout, Word .docx turns the same text into a document with native Word equations.

The ChatGPT LaTeX fixer with the quadratic-formula sample: ChatGPT text with \( and \[ delimiters on the left, the same text converted to $ and $$ on the right, and a list of six formulas — five rendered with a green tick and one, \frac{a}{b, flagged in red with the error “Unexpected end of input in a macro argument, expected }”. — The worked example above. The converted text pastes straight into Obsidian; the red row is the formula ChatGPT never finished.

Questions about ChatGPT LaTeX

Why doesn’t ChatGPT’s LaTeX render in Obsidian?

Obsidian renders maths between $ (inline) and $$ (display), and ChatGPT writes $ … $ and \[ … \] instead. The LaTeX inside is usually fine; only the wrapping differs. Converting the delimiters to $ makes it render. GitHub, Jupyter and VS Code’s Markdown preview follow the same $ convention.

Can I make ChatGPT use dollar signs in the first place?

You can ask it to (“write maths with $ and $$ delimiters”), and it often will for a while. It tends to drift back to \( in long answers, which is why fixing the text afterwards is more reliable than fixing the prompt.

What does a red flag on a formula mean?

The formula does not parse, so it would not render in any tool. The message says why: “expected '}'” means a brace was opened and never closed, and “Undefined control sequence” means a command KaTeX does not know, often a typo. Fix it in the left pane and the list updates as you type.

Will it change dollar amounts or code?

No. A single $ only counts as maths when it hugs the formula on both sides and is not followed by a digit, so “ $5 and$ 10” stays as prices. Anything inside backticks or a fenced code block is never touched.

How do I get ChatGPT equations into Word instead?

Press Word .docx here, or use ChatGPT to Word for a whole reply. Both turn each formula into a native Word equation that you can click into and edit, not an image.

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Related use cases

The quadratic formula gives the roots $x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}$, which are real when $b^2 \ge 4ac$. The area under $y = x^2$ from 0 to 1 is $$ \int_0^1 x^2\,dx = \frac{1}{3} $$ and Euler's identity is $e^{i\pi} + 1 = 0$. A formula ChatGPT cut short: $$ \frac{a}{b $$

How the LaTeX fixer works

Paste the reply. Copy it with ChatGPT’s Copy button so the LaTeX comes across as written. Formulas are found wherever they are — inline, on their own lines, in lists and tables.

Pick the target. $ … $ for Obsidian, GitHub, Jupyter and VS Code. $ … $ for LaTeX documents and Overleaf.

Check the list. Each formula is rendered with KaTeX. A red flag means it will not render anywhere until it is fixed, and says why — usually an unclosed brace or an unknown command.

Copy, download or publish. Copy the converted text, download a .docx with real Word equations, or publish a page with every formula typeset.