Utility & Math Tools
Unit converter, aspect ratio calculator, DPI calculator, number base converter, roman numerals, IP address tools, text cleaner, email extractor, and more.
15 tools — All free, no sign-up, runs entirely in your browser.
Unit Converter
Convert length, weight, temperature, volume, area, speed, data, and time units.
Aspect Ratio Calculator
Calculate aspect ratios for images, video, and screens with common presets.
DPI/PPI Calculator
Calculate DPI/PPI from pixel dimensions and physical size. Print size calculator.
Number Base Converter
Convert between binary, octal, decimal, hex, and custom bases.
Roman Numeral Converter
Convert between decimal numbers and Roman numerals (1-3999).
IPv4/IPv6 Converter
Convert and analyze IPv4/IPv6 addresses with subnet calculator.
Text Cleaner
Remove extra whitespace, smart quotes, zero-width chars, and HTML tags from text.
Email Extractor
Extract email addresses from text with deduplication and domain filtering.
WiFi QR Code Generator
Generate QR codes for WiFi networks. Scan to connect — no typing needed.
TOTP Generator
Generate and validate TOTP codes with Web Crypto API. RFC 6238 compliant.
Barcode Generator
Generate Code 128 barcodes from text. SVG and PNG download.
Phone Number Extractor
Extract phone numbers from text with international format support.
MAC Address Generator
Generate random MAC addresses with vendor OUI and format options.
Epoch Date Converter
Convert epoch timestamps to dates and back. Multiple timezone support.
QR Code Reader
Scan and decode QR codes from uploaded images.