Design a Client-Side PDF Viewer and Annotation Tool

Design a Client-Side PDF Viewer and Annotation Tool

Design a highly responsive, memory-efficient client-side PDF viewer and annotation workspace. The application must render massive PDF files (up to 500 pages) smoothly, support real-time user-drawn annotations (freehand, highlight, shape, and text), and scale without performance issues on mobile devices. Detail your approach to multi-layer viewport rendering, high-DPI scaling, virtualized rendering lists, memory management, coordinate scaling across zoom actions, and offline-first storage architecture.
ReactTailwind CSSpdf.jsWeb WorkersIndexedDBDexie.jsOffscreenCanvasSVG
00
Read
1
InterviewGPT

AI-powered tools to help you succeed in tech interviews — from resume to offer.

Interview Solver

  • Coding Puzzles
  • System Design
  • Behavioral Challenges
  • ML System Design
  • SQL Puzzles
  • FE System Design
Explore Solver

Question Bank

  • Coding Interview Questions
  • System Design Interview Questions
  • Behavioral Interview Questions
  • ML System Design Questions
  • SQL & Database Questions
  • FE System Design Questions
Explore Questions

Golden Blogs

  • Coding Solutions
  • System Design Guides
  • Behavioral Guides
  • ML System Design Guides
  • SQL Solutions
  • FE System Design Guides
Explore Blogs

Intervipedia

  • Coding Concepts
  • System Design Concepts
  • Behavioral Concepts
  • ML System Concepts
  • SQL Concepts
  • FE System Concepts
Explore Concepts

Application Tools

  • Self-Intro Generator

Company

  • Pricing
  • FAQ
  • About
  • Privacy Policy
  • Terms of Service

© 2026 InterviewGPT Inc. All rights reserved.

All systems operationalUS-East

Made with ♥ for developers