updates•5 min read
Client-Side PDF Merging: High-Speed In-Browser Assembly
Architecture Team•Feb 18, 2026
An engineering deep-dive into how we achieve sub-second PDF merging and page manipulation using pure client-side binary streams.
Combining multiple PDF files traditionally required sending hundreds of megabytes over the network to server clusters. With modern in-browser document engines, binary operations happen directly in JavaScript typed arrays.
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