ToolsKing - Practical Online Tools Platform

Free currency converter and exchange rate calculator. Convert USD to RMB, EUR to USD, CNY to JPY and 180+ world currencies with real-time rates

Convert between binary, octal, decimal, hexadecimal and other number bases

Real-time clock display and world time zones. View current time with analog clock interface and time from major cities around the world

Complete ISO country codes lookup with 2-letter, 3-letter and numeric codes, capitals, phone codes and time zones. Features real-time search filtering and one-click copy function covering 195+ countries and territories worldwide

Powerful JSON formatter and validator tool with syntax highlighting, error detection, and file support. Format, minify, and validate JSON data easily

Secure password generation tool that creates 10 strong passwords at once. Supports custom length, character types and password purposes to avoid special character conflicts

Multi-format string encoding and decoding tool supporting Base64, URL, HTML, Unicode and 8 other encoding formats with real-time conversion

Image coordinate picker and annotation tool supporting click-to-get bbox coordinates and draw rectangles from coordinates for machine learning data labeling

JWT token parser and validator supporting Header, Payload, Signature parsing with token expiration and status checking

Bidirectional converter between images and Base64 encoding supporting JPG, PNG, GIF formats with drag-and-drop upload and local processing

Multi-algorithm hash encryption tool supporting MD5, SHA-1, SHA-256 and other algorithms with real-time string hash calculation

JSON, Excel, CSV data format converter with file upload and download support for data analysis and API development

Text difference comparison and analysis tool supporting line-by-line, word-by-word, and character-by-character comparison with highlighted changes

Online QR code generation tool supporting text, URLs, emails, phone numbers and more with custom styling

Online regular expression testing and validation tool with real-time matching and syntax highlighting

Online URL encoding and decoding tool supporting both encodeURI and encodeURIComponent modes

Online color format conversion tool supporting HEX, RGB, HSL, HSV, CMYK and other format conversions

Online unit conversion tool supporting length, weight, temperature, area, volume and other unit conversions