Paste your .tex and hit Check. It finds the structural mistakes that make LaTeX fail with cryptic messages: an unmatched { or }, a \begin with no matching \end, a math delimiter left open, an unclosed \verb, or a stray _, ^, or & in ordinary text. It gives you the exact line and column, without compiling. It runs entirely in your browser, so nothing is uploaded and there is no sign-up. Free to use.
MiLatexAI is our AI connector. It links Claude or ChatGPT to your real Overleaf project, or your GitHub, GitLab, or Bitbucket repo. Instead of fixing each error by hand, ask it to fix them all: it edits the source and commits the change straight to your repository. Free to try, with a Pro plan for heavier use.
Fix my LaTeX with MiLatexAI →\begin and \end and reports any environment opened but never closed, or closed by the wrong \end, with the line of the \begin._ or ^ used in ordinary text, and a stray & outside a table or math environment. To stay false-alarm free it only flags these at the top level of your text, so underscores inside \label, \cite, \url, or file names are never touched.\begin/\end nesting, math delimiters ($, $$, \[ \], \( \)), \left/\right pairing, unclosed \verb, stray text-mode _ ^ &, and common math-mode slips like a $ placed inside an align or a blank line inside an equation. It ignores comments, escaped characters like \{, \verb content, and verbatim blocks so it does not raise false alarms. It does not catch every possible error (for example an undefined command like \alpha used in text); those are the AI connector's job.Free LaTeX tools by MiLatexAI. Runs entirely client-side.