在线工具
与「在线工具」相关的在线工具合集，共 110 个，浏览器打开即用，无需下载安装。
JSON Formatter
Online JSON formatting, minifying, and validating tool, supports multiple languages.
Timestamp Converter
Online timestamp converter between Unix timestamps and date-time, supports seconds/milliseconds and shows the current timestamp in real time.
URL Encode/Decode
Online URL encode/decode tool supporting encodeURIComponent/decodeURIComponent, one-click conversion.
Base64 Encode
Free online Base64 encoder supporting Chinese characters, converts text to Base64 right in your browser.
Text to Uppercase
Free online text-to-uppercase tool, converts lowercase to uppercase with one click, supports mixed Chinese and English.
Hex Encoding/Decoding
Free online hexadecimal encoder/decoder, converts between text and HEX quickly and accurately.
Morse Code Conversion
Online Morse code converter, converts text to Morse code and back, with audio playback.
Binary to Decimal
Free online binary to decimal converter, supports large numbers for accurate results.
Decimal to Binary
Convert decimal to binary quickly, supports integers and decimals, free online tool.
JSON to XML
Convert JSON data to XML format, handles nested objects and arrays, free and fast for developers.
XML to JSON
Convert XML data to JSON format, supports attributes, nested elements and text content.
JSON Formatter
Free online JSON formatter, beautifies JSON with syntax highlighting and indentation.
JSON Minify
Free online JSON minifier, removes extra spaces and newlines to reduce size for faster transfer.
JSON Validator
Free online JSON validator, checks syntax and pinpoints errors for reliable data.
XML Formatter
Free online XML formatter, auto-indents and aligns for better readability.
HTML Minify
Free online HTML minifier, removes redundant spaces and comments to speed up page loading.
SQL Format
Free online SQL formatter, auto-indents and beautifies queries, supports multiple database dialects.
YAML to JSON
Free online YAML to JSON converter, paste or upload YAML and convert with one click, preserving data structure.
Regex Tester
Online regex tester supporting JavaScript and PCRE syntax, highlights matches with replace and group capture.
UUID Generator
Free online UUID generator supporting v1/v4, batch generation and one-click copy for developers.
MD5 Encryption
Free online MD5 hash generator, converts text to 32-character MD5 with uppercase/lowercase output.
Password Strength Check
Free online password strength checker, analyzes security in real time with scores and improvement tips.
Text Deduplicator
Free online text deduplication tool, removes duplicate lines while keeping the first occurrence.
Capitalize First Letter
Free online capitalize tool, converts the first letter of each word to uppercase with batch support.
Text Statistics
Free online text statistics tool, counts words, characters, paragraphs and lines in real time.
Space Cleaner
Free online whitespace cleaner, removes extra spaces, leading/trailing spaces and empty lines.
Text Truncator
Free online text truncator, cuts text by characters or words while keeping whole words intact.
Remove HTML Tags
Free online HTML tag remover, strips all tags and keeps plain text with batch support.
Random String Generation
Free online random string generator, customize length and character sets for passwords and test data.
Repeated Text Generator
Repeat text generator quickly creates repeated content for testing, placeholders and practice.
String Length Calculator
Free online string length calculator, counts characters and bytes instantly, supports mixed languages.
Character Frequency Counter
Free online character frequency analyzer, counts occurrences per character with sorting.
Remove Blank Lines
Free online empty line remover, deletes blank lines in one click for compact text.
Split by Delimiter
Split text by commas, spaces, newlines or custom delimiters and copy results with one click.
Age Calculator
Enter your birth date to instantly calculate your exact age in years, months and days.
Date Difference in Days
Enter two dates to instantly calculate the number of days between them, supports multiple formats.
Date Addition and Subtraction
Add or subtract days, weeks, months or years from a date and get the result instantly.
Temperature Conversion
Free online temperature converter, converts between Celsius, Fahrenheit and Kelvin accurately.
Length Unit Conversion
Free online length converter, converts between meters, centimeters, inches, feet, yards and more.
Weight Unit Conversion
Free online weight converter, converts between kg, g, lb, oz and jin accurately.
Volume Unit Conversion
Free online volume converter, converts between liters, milliliters, cubic meters and more.
Speed Unit Conversion
Free online speed converter, converts between m/s, km/h, mph and knots.
Data Storage Unit Conversion
Free online data storage converter, converts between bit, byte, KB, MB, GB, TB with binary and decimal standards.
Time Unit Conversion
Free online time unit converter, converts between seconds, minutes, hours, days, weeks, months and years.
Factorial Calculator
Free online factorial calculator, computes n! for any non-negative integer, supports large numbers.
Fibonacci Sequence
Free online Fibonacci generator, produces the first N terms with support for large numbers.
Random Number Generator
Free online random number generator, customize min and max to generate one or more random integers.
Base64 Encoder/Decoder
Online Base64 encoder/decoder supporting text and files, fast and secure conversion.
SHA512 Encrypt
Free online SHA512 Encrypt. Runs entirely in your browser, no data uploaded, ready to use.
CRC32 Checksum
Free online CRC32 Checksum. Runs entirely in your browser, no data uploaded, ready to use.
HMAC Calculator
Free online HMAC Calculator. Runs entirely in your browser, no data uploaded, ready to use.
All-in-One Hash Calculator
Free online All-in-One Hash Calculator. Runs entirely in your browser, no data uploaded, ready to use.
URL Parser
Free online URL Parser. Runs entirely in your browser, no data uploaded, ready to use.
Base64 Image Converter
Free online Base64 Image Converter. Runs entirely in your browser, no data uploaded, ready to use.
User-Agent Parser
Free online User-Agent Parser. Runs entirely in your browser, no data uploaded, ready to use.
IP Analyzer
Free online IP Analyzer. Runs entirely in your browser, no data uploaded, ready to use.
Color Converter
Free online Color Converter. Runs entirely in your browser, no data uploaded, ready to use.
Cron Expression Explainer
Free online Cron Expression Explainer. Runs entirely in your browser, no data uploaded, ready to use.
ASCII Table
Free online ASCII Table. Runs entirely in your browser, no data uploaded, ready to use.
Batch Timestamp Converter
Free online Batch Timestamp Converter. Runs entirely in your browser, no data uploaded, ready to use.
World Timezone Converter
Free online World Timezone Converter. Runs entirely in your browser, no data uploaded, ready to use.
Countdown Timer
Free online Countdown Timer. Runs entirely in your browser, no data uploaded, ready to use.
Online Stopwatch
Free online Online Stopwatch. Runs entirely in your browser, no data uploaded, ready to use.
Zodiac & Constellation Query
Free online Zodiac & Constellation Query. Runs entirely in your browser, no data uploaded, ready to use.
Random Name Generator
Free online Random Name Generator. Runs entirely in your browser, no data uploaded, ready to use.
Random Phone Number Generator
Free online Random Phone Number Generator. Runs entirely in your browser, no data uploaded, ready to use.
Keyword Extractor
Free online Keyword Extractor. Runs entirely in your browser, no data uploaded, ready to use.
Number to English
Free online Number to English. Runs entirely in your browser, no data uploaded, ready to use.
Exchange Rate Converter
Free online Exchange Rate Converter. Runs entirely in your browser, no data uploaded, ready to use.
Pressure Unit Converter
Free online Pressure Unit Converter. Runs entirely in your browser, no data uploaded, ready to use.
Energy Unit Converter
Free online Energy Unit Converter. Runs entirely in your browser, no data uploaded, ready to use.
Angle Unit Converter
Free online Angle Unit Converter. Runs entirely in your browser, no data uploaded, ready to use.
Shoe Size Converter
Free online Shoe Size Converter. Runs entirely in your browser, no data uploaded, ready to use.
BMR Calculator
Free online BMR Calculator. Runs entirely in your browser, no data uploaded, ready to use.
CSS Formatter
Free online CSS formatting tool to quickly beautify CSS code, with automatic indentation and line breaks, making CSS code clear and readable. Supports paste, format, and one-click copy.
JS Formatter
Free online JavaScript formatting tool, quickly beautify JS code with automatic indentation and line breaks, making code clear and readable. Supports paste, format, and one-click copy.
JS Minifier
Free online JavaScript minifier tool, quickly minify JS code, remove spaces and comments, reduce file size. Supports paste, minify, and one-click copy.
HTML Formatter
Free online HTML formatting tool, quickly beautify HTML code with automatic indentation and line breaks, making code structure clear. Supports paste, format, one-click copy.
JSON Diff
Free online JSON diff tool to quickly find differences between two JSON data, supporting multiple views.
CSV to JSON
Free online CSV to JSON tool, supporting custom delimiters and quotes, easily convert CSV data to JSON format.
JSON to YAML
Quickly convert JSON data to YAML format, suitable for configuration files, data exchange and other scenarios, simple and easy to use.
JWT Parser
Free online JWT parser tool, quickly decode JWT Header, Payload, and Signature, helping debug authentication flows.
Base Converter
Supports conversion between binary, octal, decimal, and hexadecimal with detailed steps, ideal for learning and development.
XPath Tester
Online XPath testing tool, input XML and XPath expression, instantly display matching results, supports common functions and axes.
Remove Punctuation
Free online punctuation removal tool, remove all punctuation from text with one click, supports Chinese and English punctuation, quickly clean up text.
Desensitize Sensitive Information
Free online sensitive information masking tool that automatically identifies and hides sensitive information such as phone numbers, ID card numbers, and bank card numbers in text to protect privacy.
Format Number with Thousands Separator
Free online number thousands separator formatting tool, add thousands commas to numbers, support integers and decimals, easy to read.
Remove All Whitespace
Free online tool to remove all whitespace characters. One-click remove all spaces, tabs, newlines, and other whitespace from text to make it compact.
Remove Line Breaks
Free online tool to remove line breaks from text, replacing them with spaces or deleting them to merge multiple lines into one.
Reverse Word Order
Free online tool to quickly reverse the order of words in a sentence, preserving punctuation, and supporting multi-line text.
Base32 Encode/Decode
Free online Base32 encoding and decoding tool, supports standard Base32 character set, quickly convert text.
Text-Binary Converter
Free online tool to convert text to binary strings or restore binary strings to text, supporting UTF-8.
Vigenère Cipher
Encrypt and decrypt text using the Vigenère cipher algorithm with custom keys, free to use online.
RSA Encryption/Decryption
Free online RSA encryption/decryption tool, supporting public key encryption, private key decryption, and key generation.
Exponentiation Calculator
Free online power calculator supporting integer, decimal, and negative exponents, quickly calculating any number raised to a power.
Scientific Notation Conversion
Free online scientific notation converter tool, supports conversion from regular numbers to scientific notation and from scientific notation to regular numbers.
Force Unit Converter
Free online force unit converter, supports conversion between common force units such as Newton (N), kilogram-force (kgf), pound-force (lbf), etc. Enter value and unit to get results quickly.
Flow Rate Unit Converter
Free online flow unit converter, supports conversion between common flow units such as liters per minute (L/min), cubic meters per hour (m³/h), gallons per minute (GPM), etc. Enter values and units to get results quickly.
Working Day Calculator
Free online business day calculator to quickly calculate the number of business days between two dates, with support for excluding weekends and custom holidays. Easy to use, calculate now.
Millisecond Timestamp Converter
Free millisecond timestamp converter, supports bidirectional conversion between millisecond timestamps and date-time, accurate to the millisecond. Enter a timestamp or date for instant conversion.
Date Week Number Calculator
Free online week number calculator. Enter a date to get its week number in the year (ISO 8601 standard), with support for custom start week.
Date Formatting Tool
Free online date formatting tool, supports multiple common formats, customizable format, input date or timestamp, instant formatted output.
Add Prefix/Suffix to Each Line
Free online tool to add custom prefix and suffix to each line of text, supports batch processing, suitable for code, lists, etc.
Text Line Shuffler
Free online tool to randomly shuffle the order of text lines, useful for raffles, random sorting, and more.
Number Extractor
Free online number extraction tool to quickly extract all numbers from text, with options for integers or decimals.
Full-width/Half-width Converter
Free online full-width half-width conversion tool, one-click convert full-width and half-width characters in text, supporting English, numbers, and punctuation.
Remove Emoji
Free online removal of emojis from text, supports batch processing, retains text and punctuation, quickly clean up emojis in chat logs and documents.
Duration Calculator
Enter the start and end times to calculate the duration (days, hours, minutes, seconds) between them. Supports mixed date and time input, simple to operate.
AI Code Explainer
Free online AI code explainer. Paste code in any programming language, and AI will output a feature overview, step-by-step explanation of core logic, and key point tips. A great helper for learning and debugging.
Customer Service Reply Generator
Free online customer service reply generator: input negative reviews or user feedback, AI generates sincere and professional reply scripts: first empathize, provide solutions, and leave room for follow-up.
