Tech Blog
Frontend deep dives, architecture design, performance optimization, and development insights
Streams API in Practice: Streaming Large Files in the Browser
ReadableStream, WritableStream, TransformStream, backpressure—and how to process GB-scale files in the browser without OOM.
Modern CSS Layout: Grid, Flexbox, and Container Queries
From Flexbox one-dimensional layout to CSS Grid two-dimensional grids and Container Queries—modern CSS layout and ToolsKu’s responsive UI patterns.
Markdown Rendering Pipeline: From MDX to HTML
A deep dive into the remark/rehype ecosystem—syntax extensions, sanitization, syntax highlighting, slug generation—and how ToolsKu’s blog system renders content.
Browser Caching Explained: Cache-Control, ETag, and CDN Tuning
From HTTP cache headers to validation caching, strong cache to CDN edge nodes—a systematic guide to web caching and ToolsKu’s CDN configuration in practice.
PWA in Practice: Installable, Offline-Ready Tool Sites
From Web App Manifest to Service Worker caching—how to turn an online tool site into an installable, offline-capable PWA that improves retention and UX.
Web Audio API in Practice: Browser-Side Audio Processing Architecture
A deep dive into AudioContext audio graphs, AudioBuffer processing, audio node connections, and real-time analysis—and how ToolsKu's audio trimmer works under the hood.
OAuth 2.0 and OpenID Connect Explained: Modern Web Authentication Architecture
From authorization code flow to PKCE, from Access Token to ID Token—a systematic guide to OAuth 2.0 and OIDC core concepts, flow differences, and security best practices.
TypeScript Type System in Practice: From Basics to Advanced Utility Types
A systematic guide to TypeScript type inference, generic constraints, conditional types, and mapped types—plus how ToolsKu's JSON→TS generator works—to help you write type-safe code.
Canvas 2D Image Processing: Principles and Practice of Browser-Side Pixel Operations
From the Canvas rendering pipeline to ImageData pixel-level operations—how image compression, cropping, filters, and format conversion work under the hood, plus OffscreenCanvas performance strategies.
IndexedDB in Practice: Large-File Storage and Offline Architecture in the Browser
A deep dive into IndexedDB transaction models, object store design, version migration strategies, and how ToolsKu uses IndexedDB for large-file caching and offline processing.
React Server Components in Practice: RSC Architecture on the ToolsKu Site
Rendering model, Server vs Client boundaries, data fetching—and how ToolsKu uses Next.js App Router RSC for near-zero-JS first paint.
Browser File API Deep Dive: Privacy-First Local File Handling
From File, Blob, and ArrayBuffer to FileReader and the Streams API—a systematic guide to core browser file APIs and how ToolsKu achieves zero-upload, privacy-first architecture.
Web Workers in Practice: Safely Offloading Heavy Compute in the Browser
A deep dive into Web Worker threading, messaging, and memory management—with real scenarios like PDF rendering, video transcoding, and image compression—and how ToolsKu’s Worker architecture delivers performance.
Advanced Git Techniques: Interactive Rebase, Bisect, Worktree, and Hook Automation
Go beyond add/commit/push to master Git's true power: interactive rebasing, binary search for bugs, parallel branch work, and Git Hooks automation workflows.
Browser-Side Crypto in Practice: Web Crypto API and SM2/SM3/SM4
How browser-side encryption works with the Web Crypto API (AES/RSA/HMAC) and Chinese national algorithms (SM2/SM3/SM4) in JavaScript, plus architecture choices for crypto tools.
Next.js Static Export Deep Dive: Building a 200+ Page High-Performance Tool Site
A technical deep dive into Next.js App Router static export—generateStaticParams, multilingual routing, build optimizations, and real-world architecture lessons from a 200+ page static tool site.
pdf-lib Architecture: Pure JavaScript PDF Create, Edit, and Merge
A source-level tour of pdf-lib—PDF object model, cross-reference tables, stream compression, font embedding—and how ToolsKu builds 20+ PDF tools on top of it.
HTTP/3 and QUIC Protocol Deep Dive: Why Web Transport Is Abandoning TCP
From TCP head-of-line blocking to QUIC multiplexing, from 0-RTT handshakes to connection migration, a comprehensive understanding of how HTTP/3 solves HTTP/2's legacy issues.
How WebAssembly Is Reshaping Browser-Side Compute: From FFmpeg.wasm to OxiPNG
A deep dive into running native C/Rust in the browser via WebAssembly, with real-world performance and architecture lessons from FFmpeg.wasm video transcoding and OxiPNG image compression.
Frontend Performance Metrics: LCP, FID, CLS, and Core Web Vitals
How LCP, FID, INP, and CLS are measured and optimized, with real-world lessons from the ToolsKu site for building fast web apps.