PDF Lab

Drop in a PDF and the Lab engine — compiled to WebAssembly — parses it right here in your browser. Text and per-block geometry are extracted by PDFium (also WebAssembly), the same engine the native kapi-pdfium plugin uses on the desktop. Switch to the Layout tab to see each block in its place on the page, Structure for the document outline, and Blocks for the extracted content. Nothing is mocked.