办公工具
与「办公工具」相关的在线工具合集，共 46 个，浏览器打开即用，无需下载安装。
Character Counter
Online tool to count characters, Chinese characters, words, lines and bytes with real-time statistics.
Case Converter
Online case converter: ALL CAPS, all lowercase, capitalizing first letters, and title case.
Text to Uppercase
Free online text-to-uppercase tool, converts lowercase to uppercase with one click, supports mixed Chinese and English.
Text Deduplicator
Free online text deduplication tool, removes duplicate lines while keeping the first occurrence.
Text Sorter
Free online text sorter, sorts lines alphabetically or numerically in ascending or descending order.
Text Reversal
Free online text reverser, reverses line order or individual characters with one click.
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.
Number to Chinese Uppercase
Free online Chinese number converter, outputs RMB uppercase amounts for invoices and contracts.
RMB Amount Uppercase
Free online RMB uppercase converter, converts lowercase numbers to standard Chinese uppercase.
Word Counter
Free online word counter, counts words, sentences and paragraphs to help with writing.
Remove Blank Lines
Free online empty line remover, deletes blank lines in one click for compact text.
Add Line Numbers
Free online line number tool, custom start number and step for code and lists.
Regex Replace
Find and replace text with regular expressions, supports multiline, global and advanced modes.
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.
Time Unit Conversion
Free online time unit converter, converts between seconds, minutes, hours, days, weeks, months and years.
World Timezone Converter
Free online World Timezone Converter. 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.
Text Diff
Free online Text Diff. Runs entirely in your browser, no data uploaded, ready to use.
Income Tax Calculator
Free online Income Tax Calculator. Runs entirely in your browser, no data uploaded, ready to use.
Remove Punctuation
Free online punctuation removal tool, remove all punctuation from text with one click, supports Chinese and English punctuation, quickly clean up text.
Count Duplicate Lines
Free online duplicate line counter, quickly count the occurrences of each line in text, and output duplicate lines and their counts, useful for data cleaning.
Title Case Converter
Free online title case converter that capitalizes the first letter of each word and lowercases the rest, suitable for article titles, book titles, etc.
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.
Paper Size Converter
Free online paper size converter, supports conversion of international standard paper sizes including A, B, C series. Input a size to get the equivalent sizes in other series.
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.
Day of Week Calculator
Free online weekday calculator. Enter a date to quickly know the day of the week. Supports multiple date formats, simple and convenient.
Text Line Shuffler
Free online tool to randomly shuffle the order of text lines, useful for raffles, random sorting, and more.
Email Extractor
Free online email extraction tool that quickly extracts all email addresses from any text, supporting batch processing.
Phone Number Extractor
Free online phone number extraction tool to quickly extract Chinese mainland mobile phone numbers from text, supporting multiple formats.
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.
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 Article Rewriting
Free online AI article rewriting tool. Input original text for one-click unique rewriting while preserving meaning and avoiding duplication. Supports Chinese polishing and SEO rewriting.
AI Long Article Summarizer
Free online AI long article summarizer. Extract key points, generate summaries and title suggestions with one click, and quickly grasp the content of long articles.
AI Weekly Report Generator
Free online AI weekly report generator. Input this week's work content, and AI will automatically organize it into a professional weekly report including completed tasks, data highlights, risks and issues, and next week's plans.
AI Batch Rewriter
Free online AI batch rewriting tool. Paste multiple articles at once, AI rewrites them individually to preserve meaning and avoid similarity, greatly improving content production efficiency.
Excel Formula Generator
Free online Excel formula generator - describe needs in Chinese, AI auto-generates usable Excel formulas with function explanations, a true office efficiency booster.
PPT Outline Generator
Free online PPT outline generator. Enter a topic to instantly generate a complete outline including cover + content pages + end page, with title and bullet points for each slide, for efficient framework building.
Email & Document Generator
Free online email/document generator. Input key points to instantly generate formal emails or documents: including subject, salutation, body, and signature, with professional and appropriate tone.
AI Contract Review
Free online AI contract review tool, paste contract text to identify risk clauses with one click, classify by high/medium/low risk, provide modification suggestions and legal basis, supports labor contract/procurement/lease/service/NDA types.
AI Data Chart Generator
Free online AI data chart generator. Paste table data or CSV, describe your needs in natural language, and AI automatically generates bar/line/pie/radar/scatter charts with interactive preview and PNG export.
