Building Fillora PDF: Moving PDF Processing from Server APIs to Browser-Native Execution
Every developer who has built document conversion features has probably encountered the same challenges: large file uploads, server memory pressure, processing queues, timeout limits, and users who hesitate to upload sensitive documents to third-party servers.
When building Fillora PDF, we redesigned many of our core PDF manipulation tools to run directly inside the browser instead of relying on server-side processing.
This article explains why we made that architectural decision, how modern browser APIs make it practical, and the trade-offs we discovered along the way.
Traditional online PDF tools typically process every operation on a remote server.
