Chrome Extension · Open Source
Export your purchase history. Own your receipt data. No servers, no tracking, no nonsense.
BasketIndex is a Chrome extension that captures your online purchase receipts locally and turns them into a searchable, exportable purchase history — starting with Lidl.
It runs entirely on your machine. No data leaves your browser. No accounts. No analytics. Just your receipts, stored where you decide.
All data stays in your browser. No server ever sees your receipts. You control the export.
Export structured data. Use it for spreadsheets, budgeting apps, or your own analysis.
Every line of code is public. Audit it yourself. No hidden telemetry, no dark patterns.
Add the extension to Chrome. One click when the store listing is live.
Shop on Lidl as usual. BasketIndex captures receipts silently in the background.
Open your purchase hub. Export as CSV. Your data, your format.
BasketIndex was built with a simple rule: if it can work without a server, it should.
There is no backend. The extension runs entirely in your browser. We have nothing to hack, leak, or subpoena.
You never create an account. No login. No email collection. The extension never asks who you are.
Zero tracking. No Google Analytics, no telemetry, no usage pings. We cannot see what you do with the tool.
Export your history as CSV anytime. Take it to another tool. Delete it. It's yours.
BasketIndex currently works with Lidl — the first retailer adapter. Lidl is the launch integration, not the product identity.
The architecture is designed for additional retailers. Each new store is a self-contained adapter that plugs into the same local export pipeline. More adapters will be added as the project matures.
BasketIndex exports your purchase history as structured data. Once you have that export, you can analyze it with any tool you choose — ChatGPT, Claude, a spreadsheet, or your own scripts.
We provide a downloadable prompt template to get you started. It helps an AI assistant:
This is not a built-in feature. BasketIndex does the export. You choose how to analyze it. The prompt is a starting point — you can adapt it however you want.
Important: BasketIndex does not include AI. It does not calculate inflation. It does not give financial advice. It exports your receipt data. What you do with that data is up to you. The downloadable prompt is just a template.
BasketIndex is an open-source MVP for technical early adopters. This means:
The Chrome Web Store listing is currently pending review. In the meantime, you can install it manually from the GitHub repository.
BasketIndex is fully open source under the MIT license. The entire codebase is available on GitHub.
Manual installation is possible right now — clone the repo, load the unpacked extension in Chrome's developer mode, and you're running. No waiting for store approval.
Currently only Lidl. The extension is built with an adapter architecture that can support additional retailers — these will be added over time.
Entirely in your browser's local storage. BasketIndex uses the Chrome Storage API. Nothing is sent anywhere.
Yes — CSV export is built in. Your purchase history is yours to take anywhere.
No. BasketIndex is an independent open-source project. It is not affiliated with, endorsed by, or connected to Lidl or any other retailer.
No. BasketIndex exports your receipt data in a structured format. You can analyze that data with any tool you choose — ChatGPT, Claude, a spreadsheet, or your own code. The extension itself contains no AI features.
Clone the GitHub repository, open Chrome's extension management page (chrome://extensions), enable Developer Mode, and load the unpacked extension from the repo directory.
Currently Chrome only. Cross-browser support is on the roadmap.