Instant, accurate calculators for business, construction, and development. No signup required.
Browse All Tools →Instantly find your public IP address with geolocation, ISP, ASN, VPN detection, and spam blacklist checks. View your location on a map. Free, no signup needed.
Data ToolsGenerate custom QR codes for free. Create QR codes for URLs, text, email, phone numbers, and WiFi networks. Download as PNG or SVG with custom colors and sizes.
Business ToolsGenerate professional invoices in seconds with this free invoice maker. Add line items, tax, notes, and download as PDF instantly. Live preview, no signup required.
Business ToolsGenerate professional paystubs instantly for payroll record-keeping. Includes federal and state tax calculations, YTD summaries, and downloadable PDF.
Finance ToolsCalculate your monthly mortgage payment with taxes, insurance, HOA, and PMI. See how extra payments save you money and shorten your loan term.
Developer ToolsFree color picker for developers and designers. Convert HEX to RGB and HSL, generate complementary palettes, and check WCAG contrast ratios for accessible web design.
Developer ToolsFormat, beautify, and validate JSON online with real-time syntax checking. Instantly format with proper indentation, minify for production, or explore tree view.
Data ToolsView complete photo metadata including camera model, shutter speed, aperture, ISO, GPS location, and date taken. Inspect EXIF data from JPG, PNG, and TIFF.
Developer ToolsGenerate cron expressions with a visual builder. See human-readable explanations and next 5 run times. Export for AWS EventBridge, Kubernetes, and GitHub Actions.
Finance ToolsCalculate your car payment with sales tax, dealer fees, and trade-in negative equity. See monthly payments, total interest, and full loan cost breakdown.
Business ToolsCreate scannable barcodes instantly. Supports UPC-A, EAN-13, Code 128, Code 39, and QR Codes. Download as high-quality PNG images for product labels and inventory.
Finance ToolsCalculate monthly payments for any loan with detailed amortization schedule. See how extra payments save interest and shorten your term. Free loan payoff calculator.