Changelog

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.

What's New

7 New Developer Utilities (Expanding to 95 Tools)

We are excited to release wtool.dev v0.2.0, introducing seven major developer tools designed to streamline daily network debugging, container security auditing, schema modeling, and asset optimization. With this release, wtool.dev now provides 95 specialized developer utilities running privately and securely in your browser.

• JSON Schema Visualizer: Transform complex JSON Schemas into interactive visual hierarchy diagrams, collapsible tree explorers, and auto-generated technical documentation. Includes a one-click realistic mock data generator and code export panel supporting Draft-04 through Draft 2020-12 specifications.
• CIDR & Subnet Calculator: Plan and audit cloud network topologies with an interactive 32-bit visual bitmask explorer. Subdivide parent CIDR blocks into child subnets with the subnet splitter, test IP address containment, and export subnet allocation tables directly to CSV and Markdown.
• Dockerfile Linter: Audit Dockerfiles against industry security benchmarks and container best practices. Identify root execution risks, credential leaks, inefficient cache layer ordering, and missing package manager cleanup steps with actionable auto-fix suggestions.
• Image Converter: Convert and compress images across WebP, AVIF, PNG, JPEG, and SVG formats. Features client-side in-browser canvas and WASM transcoding for complete privacy, high-fidelity server conversions, batch queue processing, and customizable dimension/quality parameters.
• OpenAPI to TypeScript Generator: Convert Swagger 2.0 and OpenAPI 3.0/3.1 specifications into strongly-typed TypeScript interfaces, request bodies, query parameters, and response schemas ready to drop into frontend and backend applications.
• SSL/TLS Certificate Decoder: Inspect X.509 certificates and PEM blocks, verify Subject Alternative Names (SANs), check certificate expiration timelines, evaluate root-to-leaf trust chains, and diagnose remote server TLS configurations.
• WebSocket Client & Frame Tester: Test and debug real-time WebSocket endpoints with custom headers, frame logging, payload templating, ping/pong latency measurements, reconnection simulators, and exportable client snippets in Node.js, Python, and Go.

45+ Comprehensive Technical Engineering Guides

Navigating distributed systems, web security standards, and modern API protocols often requires deep reference documentation. In this release, we've launched our new Technical Guides Library containing 45+ production-ready guides with practical code examples, security checklists, and debugging strategies.

The new guides library is accessible directly through our interactive Guides Directory, featuring instant client-side search, category filtering, reading time estimates, table-of-contents navigation, and context-aware links to related developer tools. Featured topics include:

• Networking & Security: Subnetting & CIDR calculations, DMARC/SPF/DKIM email deliverability, SSL certificate troubleshooting, HMAC webhook verification, and CSP header policies.
• Data & API Protocols: JSON Schema to Zod/Pydantic transformations, GraphQL type generation, OpenAPI automation, and Server-Sent Events vs. WebSockets trade-offs.
• DevOps & Containers: Dockerfile multi-stage build optimization, Docker Compose to Kubernetes migrations, and GitHub Actions workflow debugging.
• AI Engineering: LLM token budgeting, prompt caching cost reduction, and structured JSON output schema validation.

Platform Performance, Sitemap & IndexNow Synchronization

We have upgraded our platform indexing infrastructure to ensure instantaneous search engine visibility for all developer resources. With automated sitemap generation and IndexNow ping integrations, updates across all 95 tools, category hubs, and engineering guides are indexed faster than ever.

Affected Tools

Tool	Change
JSON Schema Visualizer	New tool: Interactive visual diagrams, documentation generator, tree navigation, and mock data synthesizer.
CIDR & Subnet Calculator	New tool: 32-bit visual bitmask explorer, subnet splitter, IP containment checker, and CSV/Markdown export.
Dockerfile Linter	New tool: Multi-stage Dockerfile rule validation, security risk analysis, and auto-fix code recommendations.
Image Converter	New tool: Privacy-first client & server image conversion across WebP, AVIF, PNG, JPEG, SVG with batch processing.
OpenAPI to TypeScript	New tool: OpenAPI 3.x and Swagger spec parser generating strict TypeScript interfaces and API client contracts.
SSL/TLS Decoder	New tool: X.509 certificate inspector, SAN parsing, trust chain verification, and remote SSL health check.
WebSocket Tester	New tool: Live WS/WSS debugging client, frame inspector, ping/pong latency monitor, and code snippet export.

What's New

88 Client-Side Developer Utilities

We are thrilled to unveil the initial release of wtool.dev, an all-in-one developer workspace designed for speed, privacy, and seamless workflow automation. With 88 specialized tools running client-side in your browser, you can format, encode, decode, validate, and convert data without your payloads ever leaving your machine.

Whether you are debugging a nested payload in the JSON Formatter, verifying signature headers with the JWT Decoder, optimizing complex pattern matches in the Regex Tester, or computing tokens with the AI Cost Calculator, every utility provides instantaneous feedback, robust input validation, and copy-ready outputs.

Visual Pipeline Builder

Complex developer workflows frequently require chaining multiple steps together — for example, decoding a Base64 string, beautifying the nested JSON, and extracting specific fields. Our interactive Pipeline Builder enables you to connect tools together in a visual, node-based workspace. Outputs from one utility instantly feed into the next, eliminating repetitive manual copying and pasting between disconnected tabs.

Pipelines can be saved locally, exported, or published directly to the community to assist teammates and other developers solving similar data transformation challenges.

AI-Powered Explanations and Auto-Fix

When dealing with unfamiliar cryptographic tokens, distorted serialization payloads, or malformed regex patterns, developer productivity often stalls on diagnosis. wtool.dev introduces built-in AI assistance powered by multi-provider intelligence.

With a single click, you can generate plain-English explanations of complex data structures, diagnose syntax or validation failures, and auto-repair broken inputs directly inside supported tool interfaces.

Community Hub and Modern Developer UX

Discover and fork pre-configured transformation flows via our Community Explore catalog. wtool.dev is built from the ground up for modern engineering workflows:

• Instant Command Palette (⌘K): Navigate between all 88 tools and saved pipelines in milliseconds.
• Adaptive Dark Mode & Responsive Layouts: Built with fluid ergonomics for compact laptops and expansive multi-monitor setups alike.
• Privacy-First Architecture: Sensitive secrets, private tokens, and internal company schemas remain in your browser session.

Affected Tools

Tool	Change
JSON Formatter	Syntax highlighting, tree navigation, schema validation, and minification.
JWT Decoder	Header/payload token inspection, expiration verification, and claim parsing.
Regex Tester	Live pattern matching, substitution preview, group extraction, and cheat sheet.
Base64 Utility	Text and binary encoding/decoding with URL-safe variant support.
Hash Generator	Cryptographic digests including MD5, SHA-1, SHA-256, and SHA-512.
UUID Generator	Bulk v1, v4, and v7 UUID creation with customizable formatting.
SQL Formatter	Dialect-aware SQL beautification for PostgreSQL, MySQL, SQLite, and BigQuery.
AI Cost Calculator	Multi-model token cost forecasting across Anthropic, OpenAI, and Groq.