JSON Formatting Best Practices
Learn JSON formatting best practices including indentation, sorting, and commenting tips to improve code readability.
2026-06-08·5 min read
Online Toolbox
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Developer toolsJSON Tool
Online JSON editor with formatting, compression, and conversion to PHP/Go/TypeScript.
XML Tool
XML formatting, compression, and validation.
SQL Tool
Online SQL beautifier, formatter, and compressor.
Regex Tester
Online regex testing with code generation support.
Timestamp Converter
Convert between Unix timestamps and dates online.
UUID Generator
Generate UUIDs in batch.
Number Base Converter
Convert between binary, octal, decimal, and hexadecimal.
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Calculate cron expression execution times and generate expressions.
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Parse browser UserAgent information.
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Convert Curl commands to PHP/Python/Go/JavaScript code.
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Text processing toolsText Encryption
URL/Base64/MD5/SHA encryption and decryption.
Hex to String
Convert between hex and strings.
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Count characters, words, and lines in text.
Text Diff
Compare and merge text to find differences.
Morse Code
Encode and decode Morse code.
Pinyin/Wubi Converter
Convert Chinese characters to Wubi, Pinyin, and Cantonese Pinyin.
Chinese Converter
Convert between Simplified and Traditional Chinese.
Number to Chinese
Convert Arabic numerals to Chinese uppercase.
Markdown Editor
Online Markdown editor with live preview.
Mermaid Editor
Online Mermaid flowchart editor.
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Image processing toolsQR Code Generator
Generate and recognize QR codes online.
Barcode Generator
Online barcode generator.
Image Base64
Convert between images and Base64 encoding.
Favicon Maker
Create website icons online.
Placeholder Image
Generate placeholder images for frontend.
Image Watermark
Add text watermarks to images online.
Image Converter
Convert between WebP/JPG/PNG/BMP formats.
Image Compressor
Compress PNG/JPG/GIF images online.
Email Image
Generate email address images to prevent scraping.
Color Tool
Color space conversion, common colors, and color picker.
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Information lookup toolsIP Lookup
Look up IP address location.
Date Calculator
Calculate date differences and offsets.
Mobile Lookup
Look up mobile number locations.
Zip Code Lookup
Look up zip codes and area codes.
Currency Converter
Currency exchange rate calculator.
Relative Calculator
Look up Chinese relative titles.
Blood Type Chart
Look up blood type inheritance patterns.
License Plate Lookup
Look up license plates by region.
CIDR Calculator
Calculate subnet masks.
Paper Size Table
Look up A0-A10/B0-B10 paper sizes.
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View All → Academic
Learning and education toolsCalculator
Text-based calculator.
Fraction Calculator
Simplify fractions, find LCM and GCD.
Periodic Table
Look up the periodic table of elements.
Copybook Generator
Generate Chinese character practice sheets.
Xiehouyu Dictionary
Look up Chinese two-part allegorical sayings.
Idiom Dictionary
Look up Chinese idioms and play idiom chain.
World Capitals
Look up capitals of countries around the world.
Chinese Dynasties
Look up Chinese historical dynasties.
Unit Converter
Convert length/weight/volume/temperature units.
University List
Look up 985/211/Double First-Class universities.
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Other utilitiesDanmaku Creator
Create scrolling danmaku (bullet comments).
Download Converter
Convert Thunder/Xuanfeng/Kuaiche download links.
File Hash Calculator
Calculate file MD5/SHA1/SHA256 hashes.
Coordinate Converter
Convert between Amap/Tencent/Baidu map coordinates.
Coin Flip
Random coin flip.
Name Generator
Generate names based on Chinese numerology.
This Day in History
Events that happened today in history.
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View All → Technical Articles
Sharing development tips and techniquesTimestamp Conversion Tips
Master timestamp conversion techniques and learn about common pitfalls and solutions.
2026-06-08·5 min read
QR Code Generation Guide
Learn QR code generation principles, use cases, and best practices.
2026-06-07·7 min read
UUID Best Practices
Understand UUID versions, formats, and best practices for using them in projects.
2026-06-06·6 min read
Regular Expression Beginner Guide
Start learning regular expressions from scratch, master basic syntax and common patterns.
2026-06-05·8 min read
URL Encoding Explained
Deep dive into URL encoding principles and learn when to use encoding and decoding.
2026-06-05·5 min read