LaTeX Doctor reads your Overleaf compile log, finds the actual cause, and shows you the one-line fix — without leaving your editor.
Free: 200 fixes/month on 1 device · No credit card · License key sent instantly
"Missing $ inserted." Where? Why? The log points to line 312, but the real bug is 80 lines up.
You context-switch to Stack Exchange, scroll five answers, and still aren't sure which applies to your file.
It's midnight before submission. A trailing brace just ate 40 minutes you needed for the abstract.
LaTeX Doctor parses your compile log and rewrites each error in human language — pointing to the exact line that caused it, not where TeX gave up.
\input and \include\citep needs natbib in preamble.
} after \label{eq:einstein.
For most common errors we propose a diff. Review it, accept it, and the patch lands in your editor. No copy-pasting from a forum.
Your draft stays in Overleaf. We only send the compile log and the surrounding code lines — never your whole document.
Download the extension and load it in Chrome:
⬇ Download extension (.zip)Unzip it, open chrome://extensions, turn on Developer mode (top-right), click Load unpacked, and pick the unzipped folder. Open any Overleaf project — it activates automatically.
If the build fails, a sidebar opens with the plain-English error and a suggested diff. No new workflow to learn.
Review the diff, accept it, and re-run. Most projects build green in one round.
No hidden fees. Cancel anytime.
China price: ¥38/mo
China price: ¥78/mo
China price: ¥158/mo
USD and RMB pricing available · Checkout and cancellation terms are shown before payment
Just exploring? Get started free — 200 fixes/month, 1 device, no credit card.
After registering below, you'll receive a license key (e.g. ld_live_xxxxxx). Open Chrome, go to the LaTeX Doctor extension icon → Options, and paste the key in the "License key" field. Click Verify. That's it.
Pro ($9.99/mo or ¥38/mo) — 1,000 fixes/month on up to 2 devices. Perfect for solo researchers.
Max ($19.99/mo or ¥78/mo) — 3,000 fixes/month, 5 devices, and priority processing. Great for active thesis writers.
Ultra ($49.99/mo or ¥158/mo) — unlimited fixes, 10 devices, higher polish/rewrite limits, and a dedicated support channel.
Forever. 200 fixes/month, refreshes every calendar month. We'll never retroactively expire a free license key.
Yes. Cancel anytime from your account page to stop future renewals — your plan stays active until the end of the period you already paid for. There's no lock-in and no long-term contract.
Register with Gmail, QQ, 163, or Outlook. Verify the email code, then paste the key into the extension's Options page.
Paste this into the extension's Options page (click the LaTeX Doctor icon in Chrome → Options → License key field → Verify).
You're on the Free tier — 200 fixes/month. Upgrade to Pro ⭐ to unlock 1,000 fixes/month.
Paid checkout is handled by our server-side payment control plane. Drop your email and we'll notify you when your region is enabled.
You're on the list. We'll email you when checkout opens for your region.
For now, LaTeX Doctor is built around Overleaf's editor and log panel. Local TeX (TeXShop, VS Code LaTeX Workshop) is on the roadmap once beta stabilizes.
Only the compile log plus a small window of code around each error (about 20 lines). We never send full sections, bib files, figures, or PDFs.
Around 200 of the most common compile failures — missing braces, undefined commands, bibliography mismatches, math mode issues, package conflicts, and overfull boxes. Edge cases get plain-English context even when we can't auto-fix.
No. Your code is used to answer your request and then discarded. You can delete your account data at any time.
Card payments through our checkout, with more regional options (such as Alipay in China) rolling out. The methods actually open to you are shown on your account page and may vary by region. Invoicing requests are handled manually ahead of the public launch.