WebToolkit Pro (wtkpro.site)

The privacy-first developer tools ecosystem — 190+ free utilities, built by Abu Sufyan

Overview

WebToolkit Pro is a free, open-access platform of 190+ professional developer tools that run entirely inside the browser. No accounts. No subscriptions. No data ever sent to a server.

Every tool on the platform processes user input locally using client-side JavaScript — this means API keys, JSON payloads, JWTs, passwords, and source code never leave the user's device. This privacy-first approach is the core product differentiation and the reason enterprise developers and security-conscious teams choose it over alternatives.

The platform is built and maintained by a solo developer (Abu Sufyan) and deployed on Vercel Edge with Next.js 15 App Router.

Live at: https://wtkpro.site

Technical Stack

Architecture principle: 100% client-side execution. All tool logic runs in the browser via JavaScript Web Workers and WebAssembly where applicable. No backend servers process user data.

Platform Scale

Tool Categories

1. Developer Tools

Core utilities for everyday development tasks.

• JSON Formatter & Validator
• JWT Decoder & Generator
• Base64 Encoder / Decoder
• Binary, Hex & Decimal Converter
• Regex Tester & Explainer
• CSS Formatter & Minifier
• HTML Beautifier & Minifier
• Markdown to HTML Converter
• JS Code Minifier & Obfuscator
• Curl to Fetch/Axios Converter
• Git Command Helper
• Docker Compose Scaffolder
• Nginx Configuration Generator
• Apache .htaccess Generator
• Cron Expression Generator & Descriptor
• Dotenv (.env) Generator
• XML Formatter, Minifier & YAML Converter
• YAML to JSON Converter
• JSON to TypeScript, Go & Pydantic Generator
• CSV, JSON & XML Converter
• Diff Checker & Visual Code Diff
• Unix Timestamp Converter
• URL Encoder / Decoder
• HTML Entity Encoder / Decoder
• DOM Depth & Complexity Analyzer
• Browser LocalStorage Auditor
• JS Execution Time Audit
• JS Evaluator & Sandbox
• PHP Serializer & Deserializer
• PDF to Text Extractor
• EXIF Metadata Viewer & Stripper
• Webhook Payload Visualizer
• User-Agent Parser
• Kubernetes YAML Validator & CronJob Generator
• AWS IAM Policy Generator
• RAG Context Optimizer

2. SEO Tools

Technical SEO utilities for search visibility and compliance.

• SEO Meta Tag Generator
• Schema Markup Generator (JSON-LD)
• Robots.txt Toolkit
• XML Sitemap Generator & Validator
• HTTP Redirect Checker & Chain Finder
• Canonical URL Checker
• Hreflang Tag Generator
• Keyword Density Analyzer
• Heading Structure Visualizer
• Google Snippet Previewer
• Open Graph (OG) Debugger
• Twitter Card Generator
• Social Preview Tester
• Meta Description Length Checker
• Mobile-Friendly Meta Tag Generator
• HTML Image Alt Text Auditor
• URL Slug Optimizer & Generator
• Page Load Time Estimator
• Domain Age & Expiry Checker
• Domain Authority & Rank Simulator
• WHOIS Lookup
• Site Audit Pro
• AI Visibility Report
• llms.txt Generator
• Question Explorer (Reddit Insights)

3. Security Tools

Cryptographic tools and security utilities.

• Secure Password Generator
• Offline Password Entropy & Strength Tester
• Secure Hash Generator (MD5, SHA-1, SHA-256, SHA-512)
• HMAC Hash Generator
• Bcrypt Password Hasher
• Argon2 Hasher
• Scrypt Hashing Generator
• AES Encryption & Decryption
• RSA Key Pair Generator
• Content Security Policy (CSP) Builder