Hi Product Hunt 👋 I'm Martin, a French fullstack dev with several years of enterprise Java / Angular behind me. 💡 What inspired it In US custody and divorce cases, a huge share of the evidence now lives in WhatsApp. Yet it still reaches attorneys as screenshots: out of order, impossible to cite, and easy to question. Parents were spending hours cropping images while their lawyer billed by the hour to make sense of them. 🎯 The problem I wanted to solve WhatsApp gives you a raw text file. A court needs a document. That means: → every message numbered and citable → Bates numbering that continues an existing production → proof the file wasn't edited (SHA-256 certificate, source ZIP embedded) → photos in a numbered appendix, voice notes transcribed 🔄 How the approach evolved 1. It started as "Proofmark". The name changed, the focus didn't: a filing, not a scrapbook. 2. The first instinct was an AI pipeline. I dropped it. An LLM paraphrases, and a reworded message isn't evidence anymore. The parser is fully deterministic: same input, same output, to the character. 3. Then the biggest decision: no backend at all. A client's private conversation should never touch my servers. Parsing, hashing, PDF rendering, even voice-note transcription, all run in your browser. No account, no upload, nothing to breach. 4. Pricing followed the same logic: per exhibit, not per message. Four thousand messages or forty thousand, same price. 🙏 What I'd love from you Try the free preview on a real export (no account needed) and break it: weird date formats, huge chats, non-English conversations, exotic Android exports. And ask me anything about running all of this client-side. Happy to go deep on the architecture.

ChatExhibits

Court-ready WhatsApp PDFs. Nothing leaves your browser.

Court-ready WhatsApp PDFs. Nothing leaves your browser.