They charged you high. Get it itemized.

Try the live demo · No install, no account, no upload.

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What it does

hightimized audits your hospital bill against the hospital's own publicly-mandated chargemaster, flags every line where they charged more than federal law allows, and generates a certified-mail-ready dispute letter citing the exact regulation they violated.

Your data never leaves your device. OCR runs in the browser. Chargemaster data is bundled. The dispute letter renders locally. Nothing is sent anywhere — ever.

How it works

1. Drop in a hospital bill — PDF or image, drag-and-drop or file picker
2. In-browser OCR extracts every line item (Tesseract.js, no server)
3. Chargemaster audit — bundled CMS data flags overcharges automatically
4. Plain-English explanation per flagged line — what they charged vs. what the chargemaster says
5. Dispute letter citing 45 CFR §180, No Surprises Act, and your state's UDAP statute
6. Download the PDF — print, sign, certified-mail it

Privacy guarantee: Zero upload. No accounts. No telemetry. No analytics. Bill history stored only in your browser's IndexedDB. One-tap wipe. Export as encrypted JSON for portability.

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Architecture

┌─────────────────────────────────────────────────┐
│  Browser (everything runs here)                 │
│                                                 │
│  ┌──────────┐  ┌──────────┐  ┌──────────────┐  │
│  │ Drop Zone│→ │ OCR      │→ │ Bill Parser  │  │
│  │ (PDF/img)│  │ Tesseract│  │ Line Items   │  │
│  └──────────┘  └──────────┘  └──────┬───────┘  │
│                                      │          │
│  ┌──────────────┐  ┌────────────────┤          │
│  │ Chargemaster │← │ Auditor        │          │
│  │ SQLite (WASM)│  │ Flag overcharge│          │
│  └──────────────┘  └────────┬───────┘          │
│                              │                  │
│  ┌───────────────────────────┤                  │
│  │ Letter Generator          │                  │
│  │ pdf-lib → dispute PDF     │                  │
│  └───────────────────────────┘                  │
└─────────────────────────────────────────────────┘
         ↑ No network calls. Ever.

State machine

The app uses a useReducer state machine with five phases:

idle → ocr-loading → parsing → audited → letter-generating
                                  ↑              │
                                  └──────────────┘

Each transition is a typed action. Impossible states are unrepresentable.

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Tech stack

Layer	Technology
UI	React 19 + Vite 8
OCR	Tesseract.js 7 (WASM, runs in browser)
Data	sql.js (SQLite compiled to WASM) + bundled CMS chargemaster
PDF generation	pdf-lib (pure JS, no server)
PDF parsing	pdfjs-dist
File handling	react-dropzone
Testing	Vitest + Testing Library
Type safety	TypeScript 6 strict
CI/CD	GitHub Actions → GitHub Pages
Package manager	pnpm

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Development

# Install dependencies
pnpm install

# Dev server
pnpm dev

# Run tests
pnpm test:run

# Type check
pnpm typecheck

# Lint
pnpm lint

# Production build
pnpm build

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Fork it

MIT license. Built for patients — forkable for legal-aid orgs, state AG offices, and anyone who wants to deploy their own version.

The architecture is intentionally simple: one React SPA, no backend, no accounts. Fork it, customize the letter template, add your state's specific statutes, deploy to any static host.

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Contributing

See CONTRIBUTING.md. Issues and PRs welcome.

License

MIT © 2026 ByteWorthy LLC