Build a Browser PDF Filter Studio with JavaScript
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EDITOR BRIEF
This tutorial shows how to create a browser-based PDF Filter Studio using JavaScript, PDF.js, the Canvas API, and PDF-lib. Users can upload a PDF, preview pages, stack filter layers, apply preset effects, process chosen pages, preview the result, rename it, and download the edited file. All processing runs locally in the browser, so the PDF stays on the user's device.
INSIGHTS
This is a practical project for learning how browser tools can work together to edit files without a server. A good next step is to try rendering one PDF page on canvas, then add one simple filter like grayscale before building the full interface.
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