Build a Browser-Based PDF Filter Studio with JavaScript
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EDITOR BRIEF
The tutorial shows how to create a PDF editor that runs in the browser with 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, rename the file, and download the edited PDF. Because everything runs locally, the document stays on the user's device.
INSIGHTS
This is a good project for learning how web apps handle files, image effects, and PDF processing together. A practical next step is to build a simple page preview first, then add one filter such as grayscale before combining more effects.
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