12 Free Developer Tools You Can Use Right Now — No Signup Required
DevToolKitTired of creating accounts just to use a simple tool? Here are 12 free developer and security tools that work instantly — no signup, no tracking, no ads.
🌐 What is My IP?
Shows your public IP, location, ISP, device info, and a privacy exposure score. Unlike other IP checkers, this one does not track you.
👁️ Browser Privacy Check
See what websites can learn about you through browser fingerprinting. Canvas fingerprint, WebGL, installed fonts, battery level, and more.
🔐 Password Strength Checker
Calculate real entropy and crack times against 5 attack scenarios. Detects common passwords and keyboard patterns. 100% client-side.
🛡️ Website Security Scanner
Scan any domain for SSL issues, security headers, DNS configuration, and common vulnerabilities. Instant results.
🔍 Is It Down?
Check if a website is down for everyone or just you. Shows response time, HTTP status, SSL status, and server headers.
📊 JSON Diff
Compare two JSON objects side by side. Highlights additions, deletions, and changes. Great for debugging API responses.
🔑 JWT Debugger
Decode and inspect JSON Web Tokens. See the header, payload, and verify signatures without leaving your browser.
📝 Regex Tester
Test regular expressions with real-time matching highlights. Supports common regex flavors.
⏰ Cron Expression Explainer
Translate cron expressions into plain English. Also generates cron from natural language descriptions.
₿ Sats Calculator
Real-time USD to Bitcoin satoshis converter. Live price data.
🔌 Free API Directory
Browse 1,400+ free public APIs sorted by category. Filter by no-auth, HTTPS, and CORS support.
📦 Developer API
RESTful API endpoints for crypto prices, DNS lookup, SSL checking, hashing, and more. Free tier with 50 requests per day.
All tools are hosted at DevToolKit and are completely free. No accounts, no tracking, no ads. Built for developers who just want to get things done.