I couldn't run Microsoft's Threat Modeling Tool on my Mac, so I rebuilt it for the browser
My cybersecurity course teaches threat modelling with Microsoft's Threat Modeling Tool (TMT). You draw a data-flow diagram of a system, and TMT gene…
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[Перевод] Попробуйте Flutter Web с WebAssembly Week
Flutter позволяет создавать выразительные многоплатформенные приложения из единой кодовой базы. Независимо от того, разрабатываете ли вы панель упра…
Building a Zero-Lag Client-Side Python Visualizer with Pyodide & WebAssembly
Understanding code execution, call stacks, and pointer mutations can be tricky—especially when debugging complex algorithms, recursion, or data stru…
How to Find the Meaning of Life in 26 Seconds
I typed “The meaning of life” into a browser and, 25.7 seconds later, it answered The fine game of nil Not quite philosophy, perhaps—but it is an ex…
A new WebAssembly runtime enters the arena... Is it worthy?
A few minutes ago, I released my brand-new WebAssembly runtime, Wago . There's one massive problem though. Wasmtime is mature, fast, and backed by t…
Stop Writing Ruby Tests in JS Template Literals: Meet rspec-wasm
If you have built applications with ruby.wasm , you might have encountered a frustrating developer experience when writing unit tests. Testing Ruby…
Hitting an image size ceiling with Rust and WebAssembly
Many image tools expose a quality slider. Forms and government portals usually expose a different requirement: “the file must be under 100 KB.” Thos…
Launching vizcrush: Three Beliefs My Benchmarks Killed
It's the week before vizcrush goes public, and I have two files open side by side. On the left, the launch copy: the JS core beats the most popular…
What I gave up to run Spring static analysis in a browser
There is a question that costs me half an hour every time I have to answer it: If I change this controller method, what else breaks? The honest proc…
Four places ffmpeg.wasm fails silently in a Next.js app (and the fixes)
I shipped four browser-only video tools with ffmpeg.wasm: trim, compress, video-to-GIF and MP3 extraction. Files never leave the browser, nothing to…
Sandboxed Code Evaluation for AI-Generated Outputs — How I Built SafeCode Arena
The Problem: Candidate Code Without Trust You're using Cursor, Claude Code, or GitHub Copilot. The AI gives you three implementation options for the…
FFmpeg.wasm in production: deadlocks, a 2 GB ceiling and a codec that lies to users
FFmpeg.wasm can hang forever with no error, no log and no way out except killing the tab. That happened to roughly one in ten heavy jobs before I sh…
Extracting Matrix SDK into a Rust WASM Library
The Monolith Problem in Early Prototypes When building an ambitious application, it is tempting to put all code into a single repository. In early i…
Why SharedArrayBuffer forced me to delete every third-party script on my site
I wanted multithreaded ffmpeg running in a browser tab. What I got, several steps later, was a site with zero third-party scripts — no analytics ven…
Four things that surprised me running Python in the browser
I built a debugging-practice site where student code runs entirely in the browser . Python via Pyodide , JavaScript in a worker. No server executes…
Exploring WebAssembly on the Server Beyond the Browser
After spending over seven years designing distributed enterprise backends using managed frameworks like C# and Java, I recently stepped outside my h…
Exploring WebAssembly on the Server: Beyond the Browser Sandbox
For nearly a decade, my mental model for deploying enterprise software has revolved around containers, which are lightweight packages that bundle an…
I shipped a neural-network opponent into the browser: no backend, no accounts, 120 ms per move
I have a side project: a four-in-a-row board game where the opponent is a neural network I trained myself. It has been on Google Play for a while, a…
Browser-Side File Conversion with WebAssembly
A few months ago, I needed to add file conversion to a web app — nothing fancy, just letting users drop in a file and get back a different format. M…
Reviving a 20-year-old BASIC — and getting it to run in the browser
First, go press a button Before the story, the thing itself. Open this in a browser tab: 👉 https://uglymike17.github.io/basic256/ That's the full BA…
Building a real-time browser MMORPG with Three.js, Rust/Wasm, and Durable Objects
Realm of Echoes is a real-time 3D fantasy MMORPG that runs in a normal desktop browser tab. Players can choose a Warrior or Mage and enter as a gues…
BoxAgnts Tool System (7) — Skill Templates, Agent Proxies, and Cron Scheduling
BoxAgnts' tool system, from WASM sandbox instruction-level isolation to the Tool trait's unified abstraction to the Provider layer's multi-model ada…
WASM SIMD by example: 16 RGB pixels to grayscale per instruction
I finally understood WASM SIMD by writing a real kernel: RGB → grayscale luma, 16 pixels per instruction instead of one at a time. Same math, ~4× fa…
BoxAgnts Runtime (7) — Sandboxed Execution, Rebuilding Agent Infrastructure
The AI industry is moving fast. Every week brings a new agent framework, coding assistant, autonomous workflow engine, or multi-agent platform. Most…
BoxAgnts Runtime (6) — Rust + WASM, Local-First
Over the past decade, software infrastructure has moved decisively toward cloud-native architectures. AI agents followed the same path—cloud-hosted…
Building a 100% Client-Side HEIC to JPG Converter: Zero Servers, Zero Uploads
Every time I Airdrop photos from my iPhone to my Windows machine, I run into the same annoying problem: .heic files. They don’t open natively on mos…
Introducing Zopa: a 60 KB authorization engine for proxy-wasm, written in Zig
There are plenty of times you want to delegate "let this request through, or block it" to a wasm filter inside Envoy. API gateways, service mesh bou…