Deep dives into local-first system design, on-device machine learning, sandboxed components, and high-performance browser tools.
Rendering Microsoft Visio (.vsdx) diagrams client-side without servers or desktop applications is a local-first dream. Here is our engineering journey from flat XML fallbacks and WebAssembly filesystem crashes to a clean programmatic iframe integration.
Adding RAW photo support to a browser file manager should have taken an afternoon. It took most of a day, six independently reasonable failures deep. Here is each one, and why the symptoms all looked identical.
Snapping what is visible on screen is easy. Stitching a dynamic, infinite-scrolling dashboard down to the pixel-without crashing the browser or losing absolute header positions-is where the real engineering starts.
How do you screenshot 50 open tabs in the background without reloading pages or forcing active focus? Inside OmniCapt's extension-level DevTools Protocol bridge.
Screenshots of web designs are useless if covered in GDPR popups, sticky alerts, and chat bubbles. Learn how OmniCapt sweeps layers out of the frame using dynamic CSS injection rules.
Recording video clips is only half the battle. Bringing multiple recordings together side-by-side or sequentially, entirely locally in Chrome, represents the ultimate developer video utility.
Cloud LLM APIs are fast, but they cost money, add latency, and compromise data privacy. Here is how OmniBrief orchestrates Chrome's built-in Summarizer and LanguageModel APIs (Gemini Nano) for offline research.
Keyword search fails when you forget specific phrasing. Discover how we built client-side dense vector math using ONNX runtime and MV3 offscreen documents for private research indexing.
Web pages are more than prose. Learn how OmniBrief captures Schema.org metadata blocks to render native tabs for TV series cast, recipe details, events, and shopping lists without LLM cost.
Using custom cloud LLM keys shouldn't compromise your local environment. Here is how we implemented PIN-derived PBKDF2 and AES-GCM local storage encryption.
The web browser is no longer a sandboxed viewport with no hard disk options. Explore how ZumiFiles recursively loads, creates, and mutates directory structures using the File System Access API (a WICG standard in Chromium-based browsers).
Need to drop a multi-pane file manager into any web project without breaking style layouts? How ZumiFiles packages React, state channels, and Tailwind CSS styles inside a single custom element.
How do you save custom file descriptions, tags, and workspace notes without a database or backend API? Explore ZumiFiles' atomic sidecar JSON metadata synchronization mechanics.
Processing binary video shouldn't require third-party servers. Discover how ZumiFiles uses the browser's built-in WebCodecs API (via mediabunny) to trim and split videos instantly, entirely on-device.
Arrows, boxes, and blur-outs turn a raw screenshot into a usable report. OmniCapt overlays a canvas drawing surface and flattens the annotations into the final image.
Designers need the same page at desktop, tablet, and mobile widths - captured consistently, not by hand-resizing. OmniCapt drives the DevTools Protocol Emulation domain to do it.
A bug-repro recording is far more useful when viewers can see exactly where you clicked. OmniCapt paints an animated highlight layer synced to real pointer events.
Every summary in OmniBrief can be listened to, not just read - with zero audio files and no cloud TTS bill. The Web Speech API makes it possible, quirks and all.
Coaxing clean, parseable JSON out of a small on-device model is the hard part of any local-AI feature. OmniBrief uses the Prompt API's responseConstraint to make it deterministic.
Manifest V3 service workers can't touch the DOM, run long, or reliably host WebAssembly. OmniBrief runs its heavy work in an offscreen document instead - here's how.
OmniBrief can summarize with on-device Gemini Nano, a local Ollama server, or five cloud APIs - all behind one call. Here is the adapter pattern that makes models hot-swappable.
Comparing two directory trees - what was added, removed, or changed - is a classic desktop task ZumiFiles does entirely client-side, without reading every byte upfront.
Rendering a poster image for every local video usually means an upload or a bundled media engine. ZumiFiles decodes a single frame with the browser's own pipeline instead.
ZumiFiles can send a file straight from one browser to another with no server in the middle. WebRTC data channels make the transfer direct, chunked, and private.
CABE is a Chrome extension whose bookmark set changes automatically based on the site you're on - Jira links in Jira, docs in GitHub. Here's how it tracks context and resolves dynamic links.
Shipping third-party API keys to the browser is a liability. CloudSend is a small Node.js service that holds the credentials and exposes one authenticated endpoint to many targets.
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