AI-Powered Receipt and Invoice Generator (LLM-Agnostic, Prompt-Based)

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AI-Powered Receipt and Invoice Generator (LLM-Agnostic, Prompt-Based)

GitHub: https://github.com/WellApp-ai/Well/tree/main/ai-receipt-gene... Example output: https://imgur.com/a/YtFSodj We’ve open-sourced a small tool to generate synthetic receipts and invoices using LLMs — no templates, no HTML, just prompts. Why? We needed large, diverse, semi-realistic documents to evaluate our document extraction pipeline (OCR + AI). Most generators were either too rigid (static templates) or tied to a single provider. So we built our own: Features: LLM-agnostic (OpenAI, local models, etc) Prompt-driven JSON output (not rendered docs) Optional Faker-based fallback if the model isn't used Configurable schemas, locales, and output count Lightweight and hackable — runs with a single config This makes it easy to: Generate test data at scale Create edge cases (missing fields, odd currencies, broken totals) Evaluate or fine-tune document understanding models Example use case: You can ask the model to generate a receipt from a Vietnamese coffee shop, with broken math and a typo in the merchant name — and get structured JSON output that mimics what real OCR might return. Would love feedback from folks working on: LLM eval tooling Synthetic data generation OCR / document AI AI agents that touch financial data Happy to support anyone who wants to extend it or wire up other backends (Claude, Mistral, LM Studio, etc).