100% private · no tracking · works offline100% client-side/no data leaves your browser/no accounts/works offline
Every tool runs 100% in your browser — zero servers, zero tracking. Plus practical articles & tutorials for modern developers.
Search 85+ tools · works offline after first load
§ 01 — Why developers trust it
Every tool executes locally. Nothing is uploaded — your code never leaves the tab.
No analytics on your inputs, no accounts, no cookies you didn’t ask for.
Load once and keep working on a plane. All 85+ tools, no paywall.
§ 02 — Toolchain index
A taste of the kit — all 85+ tools run in your browser.
§ 03 — Latest writing
"JavaScript"
A current implementation guide to exposing safe, structured website actions to browser agents with WebMCP, including forms, JavaScript tools, lifecycle control, security, and testing.
"AI Agents"
A practical migration plan for the stateless MCP release candidate, covering request metadata, explicit state handles, caching, retries, deprecated features, and staged rollout.
LLM
GitHub Models shuts down for good on July 30, 2026 — this guide walks through finding every place your code depends on it and migrating to Azure AI Foundry, OpenRouter, a direct provider API, or a local model, with working code.
§ 04 — Guided learning
Verify if images have proper alt text.
Open tool →"JavaScript"
A production guide to Programmatic Tool Calling in the OpenAI Responses API, including tool eligibility, structured contracts, nested-call continuation, routing boundaries, and operational safeguards.