๐ง Free Online Tools
48+ Developer & Utility Tools ๏ฝ Fast, private, and free.
Developer Tools
๐ IP Lookup
Look up IP address geolocation, ISP, and network info.
Developer
๐ Base64 Encoder/Decoder
Encode or decode text and files to/from Base64 format.
Developer
๐ JSON Formatter
Format, validate, and compress JSON data with syntax highlighting.
Developer
๐ URL Encoder/Decoder
Encode or decode URLs and query string parameters.
Developer
๐ Hash Generator
Generate SHA-256, SHA-1, SHA-384 and SHA-512 hashes.
Developer
๐งช Regex Tester
Test regular expression patterns against text with match highlighting.
Developer
๐ UUID Generator
Generate random UUID v4 identifiers, bulk mode available.
Developer
๐ HTML Entity Encoder
Encode or decode HTML entities and special characters.
Developer
๐ Number Base Converter
Convert between binary, octal, decimal, and hexadecimal.
Developer
๐จ Color Converter
Convert colors between HEX, RGB, RGBA, HSL, and HSLA formats.
Developer
๐ Markdown Preview
Write Markdown with live preview and HTML output.
Developer
๐งน CSS Formatter
Format or compress CSS โ beautify messy styles or minify for production.
Developer
๐ JWT Decoder
Decode JWT tokens to inspect header and payload, no verification.
Developer
๐ XML Formatter
Format, validate, and minify XML data.
Developer
๐ HTML Preview
Live HTML/CSS/JS sandbox with real-time preview.
Developer
๐ HTTP Status Codes
Browse and search HTTP status codes with descriptions.
Developer
๐ฑ UA Parser
Parse User-Agent strings for browser, OS, and device info.
Developer
๐ข Binary Converter
Convert text to binary, hex, octal, and decimal codes.
Developer
๐ก Morse Code
Convert between text and Morse code.
Developer
Text Tools
โ๏ธ Case Converter
Convert text between upper, lower, title, camel, snake and kebab case.
Text
๐ข Character Counter
Count characters, words, sentences, paragraphs and reading time.
Text
๐ Text Diff Checker
Compare two texts side by side and highlight differences.
Text
๐ค Text to Slug
Convert text to URL-friendly slug format.
Text
๐ Lorem Ipsum Generator
Generate Lorem Ipsum placeholder text with word/sentence control.
Text
๐ Text Sorter
Sort, reverse, shuffle, deduplicate lines with options.
Text
๐ Text Replacer
Find and replace text with regex support and options.
Text
๐ Word Frequency
Analyze word frequency with distribution chart and stats.
Text
๐ข Number to Words
Convert numbers to English words, ordinal and currency format.
Text
๐๏ธ Roman Numeral
Convert between Roman numerals and Arabic numbers.
Text
๐ Palindrome Checker
Check if text reads the same forwards and backwards.
Text
Security & Encoding
๐ Password Generator
Generate strong random passwords with customizable options.
Security
๐ผ๏ธ Image to Base64
Convert images to Base64 data URIs, drag & drop supported.
Security
๐ Timestamp Converter
Convert between Unix timestamps and human-readable dates.
Security
Math & Data
๐ฒ Random Generator
Random numbers, strings, colors, and dice rolls.
Math
๐ Percentage Calculator
Calculate percentages, change, and common operations.
Math
Time & Date
๐ World Clock
Beijing time and current time in cities worldwide.
Time
๐ Time Zone Converter
Convert time between different time zones.
Time
๐
Date Calculator
Calculate days between dates, add/subtract days.
Time
Identity & Data
๐ ID Card Parser
Parse Chinese ID numbers: region, birthday, gender, checksum.
Identity
๐ Phone Lookup
Parse phone numbers to identify country and type.
Identity
๐ Postal Code Lookup
Search Chinese postal codes by city or region.
Identity
Life Tools
โ๏ธ BMI Calculator
Calculate Body Mass Index and check weight category.
Life
๐ต Tip Calculator
Calculate tip amounts and split bills.
Life
๐ช Coin Flip
Flip a coin, roll dice, draw lots, or ask yes/no.
Life
Utilities
๐ฑ QR Code Generator
Generate QR codes from text or URLs, downloadable as PNG.
Utility
๐ Unit Converter
Convert between units of length, weight, temperature, and more.
Utility
๐ CSV Viewer
Parse and display CSV data in a searchable, sortable table.
Utility
โฑ๏ธ Stopwatch
Count up timer with lap timing, split times, and controls.
Utility
Partners
These partners provide hosting, content references, AI tool discovery, classical literature, and intellectual property services.
16IDC Cloud
Website consulting and ICP filing agency services.
www.16idc.com
Jieqi Calendar
Educational content about the 24 solar terms.
www.jieqi.cc
AI Star Map
A global collection of AI tools and productivity solutions.
www.aistarmap.com
ShiCiHui
Classical Chinese poetry collections and cultural references.
www.shicihui.com
YYDIPR
Trademark, company registration, and certification services.
www.yydipr.com