Free Online Office Productivity Tools

Free online text statistical analysis tool, real-time statistics of character count, word count, sentence count, paragraph count, byte size, reading time, etc., supports Chinese and English text analysis and high-frequency vocabulary statistics.

Free online text difference comparison tool, based on Monaco Editor, supports difference comparison of text content such as code and documents, highlights added, deleted and modified content, supports real-time statistics of changed line counts, suitable for code version comparison, document proofreading and other scenarios.

Professional online color picker tool, supports conversion of multiple color formats such as HEX, RGB, HSL, HWB, LCH, CMYK, with real-time preview, transparency adjustment, and preset color library, providing convenient color management solutions for designers and developers.

Free online batch ID card age statistics tool, supports batch parsing of ID card numbers, automatically calculates age, date of birth, gender, Chinese zodiac sign, astrological sign and other information. Supports Excel export, suitable for HR management, customer analysis, data statistics and other scenarios.

Free online blank PDF generation tool, supports custom page size, orientation, margins, background color and page number settings, generate and download blank PDF files with one click. Suitable for print testing, document template creation, note paper generation and other scenarios.

Free online phone number deduplication tool, supports batch import of phone numbers, automatic duplicate detection, one-click deduplication and export, supports multiple delimiters and formats. Suitable for event list organization, customer data cleaning, member information deduplication and other scenarios.

Free online multi-countdown tool, supports running multiple independent countdowns simultaneously, with customizable sound alerts and sound preview. Suitable for focused work, exercise timing, cooking timing and many other scenarios.

Free online PDF translator. Upload PDFs, pick one or more target languages, and get translated PDFs with preserved layout or Markdown documents. Supports batch files and scanned PDFs (auto OCR).

Free online webpage screenshot tool supporting three modes: webpage screenshot, current page screenshot, and HTML screenshot. Supports PNG, JPEG, WebP formats with adjustable quality, scale, and delay. One-click download or copy to clipboard.

Free online WHOIS registration lookup tool supporting domain and IP address queries. Get detailed information including domain registrar, registration date, expiration date, DNS servers, domain status, as well as IP network info, AS number, and geolocation data.

Free online Markdown editor with real-time preview, syntax highlighting, import and export features. Supports split-screen editing, full-screen preview mode, and export to HTML and Markdown files.

Professional annual meeting lottery tool with 3D sphere drawing, multi-prize settings, Excel import, winner card animations, fullscreen display, and background music.

Free online ebook format converter supporting EPUB, MOBI, PDF, TXT, AZW3, FB2, HTML, Markdown and more. No software download needed, convert directly in your browser with batch processing support.

Free online e-book reader supporting TXT and EPUB formats. Features multiple reading themes, font size adjustment, table of contents navigation, bookmark management, and more for a comfortable reading experience.

Free online office document format converter. Convert between Word, Excel, PPT and PDF formats. Support batch conversion, no software installation needed.

Free online tool to extract all embedded images from PPT/PPTX files. Batch export high-quality images, icons, and background assets without manual saving. Supports JPG, PNG, GIF, SVG formats with original quality preserved.

Free online 3D model viewer supporting OBJ, GLTF/GLB, STL, FBX formats. Real-time preview, wireframe mode, auto-rotation, screenshot save and more. View 3D models directly in your browser without installing any software.

Free online personal task management tool supporting to-do management, scheduling, priority sorting, category tags, and progress tracking. Visual kanban view for efficient daily planning.

A specialized online tool for generating printable graph paper, supporting custom grid size, line color, paper dimensions, and margins. Generate and print high-precision grid, coordinate, or dot paper online.

Free online Mermaid diagram editor supporting flowcharts, sequence diagrams, class diagrams, state diagrams, Gantt charts, pie charts, mind maps and more. Real-time preview, one-click SVG/PNG export, no registration required, completely free.

Free online font preview tool. Supports preview of various Chinese and English system fonts with adjustable font size, weight, italic, color and more. Real-time display of different font effects.

Free online financial model calculator supporting NPV, IRR, compound interest, annuity, and loan amortization calculations to help with investment decisions and financial planning.

Free online PDF merger tool to combine multiple PDF files into one PDF. No server upload required, all operations are done locally in your browser to protect your file privacy.

Free online PDF file splitting tool. Split PDF by page range, extract specific pages into new PDF files. All processing happens locally in your browser.

Free online PDF file compression tool. Customizable compression levels to effectively reduce PDF file size while preserving quality. All processing is done locally in your browser, ensuring file privacy and security.

Free online PDF watermark tool. Customize watermark text, position, opacity, rotation, font size and color. All processing is done locally in your browser - no files are uploaded to any server.

Free online PDF page number tool. Customize page number position (header/footer/center/left/right), format (Page X/Page X of Y), start number, font size and color. All processing happens locally in your browser - no server upload needed, keeping your files secure.

Free online PDF encryption and decryption tool. Set password protection for PDF files or remove existing passwords. All processing is done locally in your browser - no files are uploaded to any server, ensuring your privacy.

Free online PDF metadata editor. View and modify PDF file metadata including title, author, subject, keywords, and more. All processing is done locally in your browser, ensuring file privacy and security.

Free online PDF watermark removal tool. Remove text watermarks and image watermarks from PDF files. Automatic watermark detection with custom color-based removal. All processing is done locally in your browser - no files are uploaded, ensuring your privacy.

Free online PDF page reordering tool. Upload a PDF, rearrange page order, and delete unwanted pages. All operations are done locally in your browser.

Free online Excel to JSON converter. Upload .xlsx/.xls files, auto-parse spreadsheet data, preview table content in real-time, and export JSON format with one click. Supports multiple worksheets, custom export options. No server upload required, secure local conversion.

Free online CSV to JSON converter. Transform CSV data into JSON format instantly. Supports custom delimiters, quote characters, header row options, real-time preview, and one-click copy or download of generated JSON files.

Free online file to PDF converter. Supports converting images (JPG/PNG/GIF/BMP), Word documents (.docx), and Excel spreadsheets (.xlsx) to PDF format. All files are processed locally in your browser - no upload required, your privacy is protected.

Free online pie chart maker tool. Customize data labels, values and colors. Generate pie charts and doughnut charts. Export to high-quality images for data visualization, reports and presentations.

Free online donut chart and pie chart maker. Supports custom data items, colors, labels, and real-time chart preview. Create both donut and pie charts, export as PNG images. Perfect for data visualization, reports, presentations, and dashboards.

Free online stacked bar chart maker. Customize data series, category labels, and color themes with real-time chart preview. Add/remove data series and categories, export as PNG image. Perfect for data visualization analysis and report presentations.

Free online bar chart maker tool. Add custom data labels and values, generate beautiful bar charts in real-time, customize colors, orientation, value display and grid, with one-click image export.

Free online scatter plot maker with customizable data points, X/Y axis labels, chart title, point colors, and trendlines. Import CSV data, export charts as PNG images, perfect for data analysis and visualization.

Free online radar chart maker with customizable dimensions, multi-series comparison, and personalized color settings. Real-time preview with one-click HD image export. Ideal for capability assessment, data analysis, and performance display.

Free online tree diagram maker. Generate organization charts, family trees, and hierarchy diagrams from indented text. Supports custom direction, colors, shapes, and export to PNG and SVG formats. Perfect for project management, knowledge organization, and organizational structure visualization.

Free online Sankey diagram generator. Custom nodes and flow data, real-time Sankey chart rendering. Perfect for traffic analysis, data flow visualization, energy flow diagrams, and more. One-click export as PNG.

Free online bar chart maker. Customize data, colors, titles and more. Real-time preview, one-click PNG export. No sign-up, no download required, works directly in your browser.

Free online line chart maker tool. Supports custom data points, chart titles, axis labels, line colors and styles. Real-time preview, one-click export to image, no ads, no download required. Perfect for data visualization, trend analysis and report presentations.

Free online funnel chart maker supporting multi-stage data visualization, automatic conversion rate and drop-off rate calculation, custom colors, real-time preview, and one-click chart export. Perfect for sales funnels, user conversion analysis, and marketing performance tracking.

Free online word cloud generator. Customize text, color themes, font sizes, and more. Generate beautiful word clouds with one click. Supports Chinese word segmentation, automatic word frequency statistics, and high-quality PNG export.

Free online bar chart and line chart maker. Supports bar charts, line charts, and combined bar-line charts. Add data freely, preview chart effects in real-time, and export as PNG images. Perfect for data visualization, report presentations, and teaching demos.

Free online stacked area chart maker. Supports multi-series data management, custom colors and labels, real-time chart preview, and PNG export. Perfect for visualizing cumulative trends of multiple data series over time or categories.

Free online Nightingale Rose Chart (Polar Area Diagram) maker. Customize data, colors, and legends with real-time preview. Export high-quality images for data visualization, statistical reports, and academic presentations.

Free online K-line (candlestick) chart maker. Input OHLC data to generate professional stock K-line charts. Supports moving averages, volume bars, chart export as image. Perfect for technical analysis, financial data visualization, and educational demonstrations.

Free online Fishbone (Ishikawa/Cause-and-Effect) Diagram maker. Define problems and analyze causes for root cause analysis and brainstorming. Supports 6 standard categories (Manpower, Methods, Machines, Materials, Measurements, Environment). Freely add categories and causes, generate professional fishbone diagrams in real-time, and export as images.

Free online Gantt chart maker for creating and managing project task schedules. Add tasks, set start and end dates, track completion progress. Perfect for project management, team collaboration, and engineering scheduling.

Free online heatmap maker tool. Customize data matrix and color gradients to generate professional heatmaps in real time. Ideal for data analysis, sales statistics, temperature distribution, and performance monitoring.

Free online organization chart maker. Create professional company org charts and team structure diagrams with names and positions. Customize colors, layout directions, and export to PNG/SVG. Ideal for enterprise management, team showcase, and HR planning.

Free online burndown chart generator for Scrum agile development. Track sprint progress by entering daily completed story points, automatically generating ideal vs actual line charts. Export to PNG. Perfect for project management and agile teams.

Free online swimlane diagram maker. Quickly draw cross-functional flowcharts, business process diagrams, and SOP flowcharts using Mermaid syntax. Supports real-time preview, theme switching, visual builder, and one-click export to SVG/PNG.

Free online sequence diagram maker powered by Mermaid. Real-time preview, support for participants, message arrows, autonumbering, themes, and one-click SVG/PNG export. No registration required.

Free online UML class diagram maker. Quickly create class diagrams via visual forms, supporting classes, attributes, methods, inheritance, composition, aggregation, association and more. Real-time preview and one-click SVG/PNG export.

Free online PDF editor. Delete, rotate, reorder, merge, and extract PDF pages directly in your browser. No server upload required, all processing is done locally to protect your file privacy.

Free online teleprompter for live streaming, speeches and video recording. Edit scripts, adjust scrolling speed, font size, line spacing, mirror, flip and fullscreen display.

Free online batch file renaming tool. Upload files of any type, set prefix/suffix/serial number rules, drag to reorder, preview new filenames in real-time, and download all renamed files as a ZIP archive.

Free online PDF page rotation tool. Rotate pages in your PDF file 90° clockwise, 90° counter-clockwise, or 180°. Support individual page rotation and batch operations. All processing is done locally in your browser - no files are uploaded to any server, ensuring your privacy.