20 tools in this category
View all toolsWeb Code Guides & Technical Standards
Master workflows, understand protocol specifications, and avoid production edge-cases.
Technical Field Manuals
Automating API Contract Testing: Converting OpenAPI 3.1 to Postman Collections
Transform OpenAPI (Swagger) specifications into executable Postman Collections (v2.1). Automate contract testing, generate mock servers, and streamline API integration.
Clean HTML to Markdown for LLM & RAG Pipelines: Token Minimization & Semantic Table Extraction
Strip DOM boilerplate, convert complex HTML tables and semantic trees into clean Markdown, slash RAG embedding token costs by 60–80%, and preserve critical context for LLMs.
Content Security Policy (CSP) Headers: Production Implementation & Debugging Guide
Master Content Security Policy (CSP) headers, nonce generation, sha256 script hashing, Report-Only mode, and debugging modern Next.js and SPA violations.
Converting cURL Commands to Clean Node.js, Python, and Go HTTP Clients
Transform raw cURL commands and browser network exports into production-ready JavaScript Fetch, Axios, Python Requests/HTTPX, and Go net/http code.
De-minifying Production Stack Traces: Source Map Resolution Guide
Resolve minified JavaScript bundle errors back to original TypeScript source code using VLQ-decoded source maps, hidden source maps, and stack trace resolvers.
Debugging CORS Errors: The Complete Guide to Preflight OPTIONS & Headers
A production debugging guide to fixing missing origin headers, failed preflight OPTIONS requests, credentialed CORS mismatches, and reverse-proxy proxy pass drops.
Debugging Open Graph & Twitter Cards for Dynamic Social Previews
Master Open Graph protocol, Twitter Card meta tags, dynamic OG image generation, and crawler cache invalidation across Slack, Discord, Twitter/X, and LinkedIn.
Frontend Bundle Size Optimization: Tree-Shaking, Chunk Splitting & Dead Code Elimination
Diagnose JavaScript bundle bloat, fix broken tree-shaking patterns, eliminate barrel file overhead, and optimize Core Web Vitals (INP/LCP) in Next.js, Vite, and Webpack.
Generating TypeScript Types from JSON: Schemas, Interfaces & Zod
How to generate type-safe TypeScript interfaces, Zod runtime validation schemas, and JSON Schema definitions from arbitrary JSON payloads.
GitHub Actions YAML Workflow Debugging: The Top 10 Syntax & Runtime Pitfalls
A comprehensive developer guide to identifying and fixing GitHub Actions YAML syntax errors, matrix build bugs, expression interpolation traps, and concurrency race conditions.
GraphQL Schema to TypeScript: Automated Type Generation, Operations & Codegen Guide
Generate end-to-end type safety across your GraphQL stack. Learn how to convert GraphQL SDL schemas and documents into typed queries, mutations, and resolver signatures.
Handling HTTP 429 Too Many Requests: Rate Limiting Headers, Exponential Backoff & Jitter
Diagnose and handle HTTP 429 status codes. Master IETF standard RateLimit and Retry-After headers, and implement production-grade exponential backoff with full jitter in Node.js, Python, and Go.
HAR File Analysis: How to Diagnose Slow API Endpoints & Network Bottlenecks
A practical guide to analyzing HTTP Archive (HAR) files, decoding network timing waterfalls, identifying high TTFB, and debugging slow REST and GraphQL APIs.
HTTP Cache-Control & CDN Caching: The Production Guide to stale-while-revalidate, ETags & Edge Invalidation
Master HTTP caching headers, understand browser vs CDN shared cache directives (s-maxage, stale-while-revalidate, immutable), and eliminate stale content and cache poisoning bugs.
HTTP Redirects Demystified: Debugging 301 vs 308, Chains, and Redirect Loops
Master HTTP 3xx status codes: 301 vs 308 permanent redirects, 302 vs 307 temporary redirects, fixing ERR_TOO_MANY_REDIRECTS loops, and optimizing redirect chains.
Kubernetes YAML Validation: The 10 Most Common Manifest Mistakes
Diagnose and fix syntax errors, missing resource limits, selector mismatches, and schema validation failures in Kubernetes manifests before deployment.
Mastering Cron Expressions: Syntax, Timezones, and DST Gotchas
Master 5-field and 6-field cron syntax, prevent double executions during Daylight Saving Time (DST), handle UTC schedules, and debug missed server jobs.
Mastering Git Merge Conflict Resolution: 3-Way Diff, Diff3 Markers & Rebase Workflows
Resolve Git merge and rebase conflicts with confidence. Master standard vs diff3 conflict markers, 3-way merge logic, and conflict prevention strategies.
Mastering SQL Execution Plans: Reading EXPLAIN ANALYZE, Index Scans & Query Optimization
Diagnose slow database queries by decoding EXPLAIN (ANALYZE, BUFFERS) output trees, optimizing composite indexes, understanding bitmap heap scans, and eliminating sequential scans.
Model Context Protocol (MCP) Server Schema Validation & Tool-Calling Debugging
A technical guide to authoring, validating, and debugging JSON Schema tool definitions for Model Context Protocol (MCP) servers in AI agents and LLM applications.
PWA Web App Manifest & Service Worker Guide: Icons, Offline Caching & Installability
Build installable Progressive Web Apps that pass Lighthouse audits. Master web app manifest configurations, maskable icons, and service worker caching strategies.
Server-Sent Events (SSE) vs WebSockets: Streaming Architecture for LLM & Real-Time APIs
Master unidirectional SSE vs bidirectional WebSockets for modern applications. Learn HTTP/2 multiplexing, automatic reconnection, Nginx proxy buffering gotchas, and token-by-token LLM streaming.
SVG Optimization & Sanitization: Production SVGO Configs, viewBox & XSS Hardening
Strip metadata bloat and invisible paths using SVGO, sanitize malicious script tags and inline event handlers to prevent SVG-based XSS, and configure responsive viewBox scaling.
URL Encoding & Query Strings: Mastering RFC 3986, encodeURIComponent & URLSearchParams
Demystify percent-encoding rules, avoid double-encoding pitfalls, master + vs %20 space representations, and serialize complex nested objects and arrays for REST query strings.
WCAG 2.2 Accessibility Audit Checklist: Automated & Manual Testing Guide
A comprehensive developer guide to WCAG 2.2 accessibility compliance: new success criteria, color contrast ratios, keyboard navigation, ARIA patterns, and CI/CD audit workflows.
Webhook Security & HMAC Signature Verification: Production Implementation Guide
Master webhook security: implement HMAC-SHA256 signature verification, prevent replay attacks with timestamp headers, avoid raw-body parser bugs, and secure asynchronous API callbacks.
WebP vs AVIF vs SVG: Modern Web Image Optimization & Compression Guide
Optimize Core Web Vitals (LCP), compare AVIF vs WebP compression and decoding speeds, strip EXIF metadata, and implement responsive picture elements.
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Frequently Asked Questions
Are the web & code tools free?+
Yes, all web & code tools are free with no limits. SQL formatting, URL encoding, JS minification, and validation all run directly in your browser.
Can I validate OpenAPI specs with these tools?+
Yes. The OpenAPI validator checks your spec for structural issues that violate the spec, and the PWA audit validates manifests and service workers.
Do I need to sign up to use the web tools?+
No. Every web & code tool works instantly from a paste, with no account and no data uploads.