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A binary instruction format that allows code written in languages like Python or C to run in web browsers at near-native speed.
WebAssembly (often abbreviated as Wasm) is a technology that lets web browsers run programs written in languages other than JavaScript. This converter uses WebAssembly to run a Python PDF parser (pdfminer.six) entirely inside your browser. This is how we achieve client-side processing: the PDF parsing engine runs locally in your browser as WebAssembly code, so your bank statement never needs to be sent to a server.
WebAssembly is a W3C standard supported by all modern browsers. In this converter, Pyodide (a Python runtime compiled to WebAssembly) loads pdfminer.six, a Python library for PDF text extraction. When you drop a PDF file, the browser reads it as a byte array and passes it to the Pyodide runtime, which runs pdfminer.six to extract text and table structures. The results are returned to JavaScript for CSV generation. The entire Pyodide runtime is approximately 10-15MB and is cached by the browser after the first load, enabling offline use.
Data breaches in the financial sector increased 18% year-over-year.
Source: Identity Theft Resource Center 2024 Data Breach Report
U.S. consumers used an average of 5.3 financial products in 2023.
Source: Federal Reserve - Economic Well-Being of U.S. Households
A binary instruction format that allows code written in languages like Python or C to run in web browsers at near-native speed.
Understanding webassembly helps you work more effectively with your financial data. When converting bank statements to CSV, this concept is directly relevant to how your data is structured and used.
WebAssembly is part of the broader process of extracting, transforming, and using financial data from bank statements. Our converter helps bridge the gap between PDF bank statements and usable spreadsheet data.
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