Processing 100MB PDFs in the Browser: The Performance Optimizations That Made TinyPDF Usable When I built TinyPDF ( https://tinypdf.cn/?utm_source=devto&utm_medium=blog&utm_campaign=performance_optimization&utm_content=devto_performance_2026-07-28 ), I had one hard rule: no backend. Everything had to run in the browser. No file uploads, no servers, no costs. Just drag, drop, compress, download. But when I tested the first version with a real portfolio—88MB, 45 pages, full o...