v0.3.0: 100 Tools Milestone, SQLite & JQ WASM Playgrounds, OpenTelemetry Tracing, and Nginx Generator

What's New

100 Developer Tools Milestone (5 New Specialized Utilities)

We are proud to announce wtool.dev v0.3.0, marking a major milestone: 100 client-side developer utilities running privately, securely, and instantaneously in your browser. This release introduces five new heavy-duty tools powered by WebAssembly, distributed observability diagnostics, modern web server orchestration, and multi-model AI tool interoperability.

• SQLite Viewer & SQL Playground: Open and query SQLite databases (.db, .sqlite, .sqlite3) directly in your browser with zero server uploads using in-memory WebAssembly (sql.js). Features a multi-tab SQL editor with syntax highlighting, runtime performance benchmarks, interactive table schemas with pagination and sorting, EXPLAIN QUERY PLAN tree visualization for query optimization, a visual Table Creator for schema modeling, and one-click data export to CSV, JSON, and SQL insert statements.
• JQ Playground & Filter Workbench: Build, test, and debug complex JQ transformation queries in real time with client-side WebAssembly execution (jq-wasm). Includes built-in recipe libraries for array filtering, key mapping, conditional aggregation, and structural flattening, paired with syntax error highlighting and side-by-side formatted or raw text output streams.
• OpenTelemetry Trace Analyzer: Visualize and diagnose distributed tracing payloads using standard OpenTelemetry (OTLP) JSON. Inspect multi-service execution flows with interactive waterfall Gantt charts, hierarchical span trees, latency bottleneck detection, critical path highlighting, and structured span attribute/event inspection for microservices and cloud workloads.
• Nginx Config Generator: Design, customize, and export production-ready, security-hardened Nginx configurations through an intuitive visual interface. Configure reverse proxy paths, Single Page Application (SPA) fallbacks, PHP-FPM sockets, and upstream load balancers alongside automated Certbot SSL setup, Mozilla Modern/Intermediate TLS profiles, HTTP/2 & HTTP/3 (QUIC), Gzip/Brotli compression, rate limiting zones, and strict HTTP security headers (CSP, HSTS, X-Frame-Options).
• LLM Tool & Function Calling Converter: Bridge the gap between AI developer ecosystems by converting tool and function calling schemas seamlessly across OpenAI, Anthropic Claude, Google Gemini, Ollama, LangChain, Vercel AI SDK, JSON Schema, and TypeScript interface definitions. Includes live schema validation and instantaneous multi-target code generation.

Image Converter Format Detection & Optimization

We have upgraded the Image Converter with intelligent file signature and magic byte format detection. This resolves issues where mismatched file extensions caused unexpected transcode behaviors. In addition, conversion pipelines across WebP, AVIF, PNG, JPEG, and SVG now intelligently prevent file size inflation by preserving optimal chroma subsampling and default compression targets during format conversions.

25+ New Technical Guides & 40+ Architecture Glossary Terms

Our Technical Guides and Developer Glossary libraries have expanded significantly with over 25 new engineering deep dives and 40+ glossary reference entries. New topics provide practical, production-ready code examples and security checklists:

• Data Serialization & Code Generation: Deep dives on converting JSON payloads into strongly typed models across C# (.NET), Go structs, Dart/Flutter, Rust Serde, Python Pydantic, and TypeScript.
• Security & Systems Engineering: Guides covering Dockerfile security benchmarks, multi-stage layer caching, cryptographic hashing standards (SHA-256, SHA-3, BLAKE2, HMAC), reverse DNS & PTR email deliverability, and Nginx reverse proxy architecture.
• Modern Web & Styling: Practical guides for modern CSS selectors (:has(), specificity rules), OKLCH / Display-P3 color spaces, and CSS keyframe animation performance.
• AI Systems & Observability: Guides on structured JSON outputs, prompt injection defenses, prompt caching cost reduction, and OpenTelemetry span analysis.

Affected Tools

Tool	Change
SQLite Viewer	New tool: WASM-powered SQLite database explorer, SQL editor, query plan visualizer, and table creator.
JQ Playground	New tool: WASM-powered JQ query builder, filter tester, live error diagnostics, and preset recipes.
OpenTelemetry Trace Analyzer	New tool: OTLP trace debugger with waterfall Gantt charts, hierarchical span trees, and bottleneck detection.
Nginx Config Generator	New tool: Visual Nginx configuration builder with TLS profiles, HTTP/3, reverse proxies, and security hardening.
LLM Tool Converter	New tool: Multi-format LLM function/tool calling schema translator for OpenAI, Claude, Gemini, Ollama, and LangChain.
Image Converter	Magic byte format detection, size inflation prevention, and improved compression presets.