Free Developer Utilities & Engineering Tools
Streamline your day-to-day software engineering workflow with Silixen Developer Tools. Format and validate nested JSON documents with syntax highlighting, generate typed TypeScript interfaces in seconds, decode JWT token headers and expiration timestamps locally, and query authoritative DNS records using Google DoH. Designed by developers for developers, these lightweight utilities eliminate repetitive tasks, minimize debugging latency, and respect your data security by executing non-network operations entirely client-side.
Available Developer Tools
Select any tool below to start using it immediately with zero sign-up.
JSON Formatter & Validator
Format, validate & beautify JSON free online. Tree view, exact error locations, JSONPath, sort keys & minify — 100% private, in your browser.
JSON to TypeScript Converter
Convert JSON objects into clean TypeScript interfaces and types online for free. Auto-detects nested objects, arrays, and optional fields. 100% private.
CSV to JSON Converter
Convert CSV spreadsheets into JSON arrays and objects online for free. Automatic header detection, number parsing, and custom delimiters. 100% private.
Markdown to HTML Converter
Convert Markdown to clean, sanitised HTML with a live preview, GFM tables, footnotes, alerts and export themes. Free, private, in your browser.
Base64 Encoder & Decoder
Encode text or files to Base64 and decode it back to text, images, or files — free, instant, and 100% private in your browser. URL-safe + JWT inspector.
UUID Generator
Generate random, high-entropy UUIDs (v4 and v7) online for free. Generate single or bulk unique identifiers instantly. Cryptographically secure and private.
JWT Decoder & Verifier
Free JWT decoder and verifier: decode header, payload and claims, check expiry with a live countdown, and verify HS256/RS256/ES256 signatures in your browser. Tokens never leave your device.
Password Generator
Free password generator with exact entropy maths: strong random passwords, EFF passphrases and pronounceable mode. 100% client-side — nothing leaves your browser.
2FA Authenticator
Generate TOTP 2FA codes online free — multi-account board, SHA-1/256/512, 6/8 digits, otpauth import, bulk import, QR export, code checker. 100% client-side, secrets never leave your browser.
Domain & DNS Lookup
Lookup authoritative DNS records online for free. Query A, AAAA, MX, NS, TXT, CAA, and CNAME records via Google Public DNS with live verification.
Website Uptime & Status Checker
Check if a website is down for everyone or just you. Test live server response times, HTTP status codes, and SSL certificate validity online for free.
IP Address Tracker
Look up any public IP address free — city, country, ISP, ASN, timezone and map. IPv4 + IPv6, domain lookup, no sign-up, nothing stored.
Invoice Generator
Create professional business invoices online for free. Add line items, taxes, discounts, and payment terms. Download printable PDF invoices instantly.
Live Currency Converter
Convert international currencies with live exchange rates for free. Fast, accurate foreign exchange conversions across USD, EUR, GBP, and global pairs.
Crypto Price Tracker
Track live cryptocurrency prices, market caps, and 24h volume for Bitcoin, Ethereum, and major digital assets online for free. Fast and ad-free.
Weather Forecast App
Check real-time weather forecasts, temperature, humidity, and 7-day outlooks for any city worldwide online for free. Fast and ad-free weather app.
Why Use Silixen for Developer Tools?
100% Free Forever
Zero credit cards, zero hidden paywalls, and no subscription traps.
Privacy by Design
All client-side tools run in your browser. Files and inputs never leave your device.
High Accuracy & Speed
Engineered with optimized WebAssembly, canvas rendering, and instant formulas.