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Built a LaTeX editor where the AI explains errors in plain English, not just shows them — free tier, would love feedback
I built FormaTeX — a browser-based LaTeX editor combined with a REST API and an AI assistant. It's live at formatex.io. Free tier doesn't need a credit card. **What it is:** The editor works like Overleaf — write LaTeX in the browser, compiled PDF on the right. Real-time collaboration with roles (editor/viewer). The AI assistant is built into the editor: it fixes errors, explains what went wrong in plain English, and can generate LaTeX from a description. Smart Compile auto-detects the right engine from your preamble (so if you're using fontspec it routes to xelatex automatically) and applies fixes for common compilation errors before returning anything. **How it compares to Overleaf:** Honestly, if you only need an editor and basic collaboration, Overleaf is mature and well-tested. This isn't for everyone. Where FormaTeX differs: - It has a REST API. If you need to compile LaTeX programmatically — for document automation, AI pipelines, CI/CD — Overleaf can't do that. - AI error explanation is more capable than what Overleaf currently offers (which is none, as far as I know) - No collaborator limit on the free tier **Free tier:** 15 api compilations/month, pdflatex + xelatex, 5 AI requests. No card. Happy to answer anything about how it works.
FormaTeX identifies a genuine pain point in LaTeX's cryptic error messaging and a gap in the market for a programmatic LaTeX API. However, it faces a massive incumbent in Overleaf and lacks a significant technical moat or early traction signals to suggest it can capture substantial market share.