Full‑screen multilingual whiteboard with tools, pan/zoom, tabs, and persistence. Created by multiple AI models.
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utils/whiteboard.html
Alternate single‑file whiteboard variant. Created by Gemini.
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utils/whiteboard_google.html
Single‑file whiteboard with polished UI/UX, selection, stamps and paste. Created by GPT‑5.
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utils/whiteboard_gpt.html
Rich text editor with formatting, file operations, find/replace, and multilingual UI. Supports .txt, .docx, and .html import/export.
Single‑file canvas editor with layers, blend modes, filters, brush/eraser, gradient, shapes and text.
Expanded UI: menus, advanced color picker, selections, export/import project, zoom/pan and more.
Retro‑styled pixel editor with palette, grid size control and PNG export. Multilingual UI.
Modern pixel editor with brush/eraser/select, image import with palette match, and PNG export.
Layered pixel editor for animation sprints: opacity, duplicate, selection/move, playback, import and export ZIP.
Client‑side converters: Base64, URL, MD5/SHA/HMAC, HTML/Unicode, JSON, CSV, YAML, XML. Multilingual UI and themes.
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utils/dev_utils.html
Generate mock data for testing and development. Choose from various data types, locales, and output formats like JSON, CSV, SQL, and more.
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utils/fake_data_generator.html
Single‑file SVG mind map: free/tree/radial layouts, add/edit/delete, zoom/pan, i18n and export/import.
A 3-in-1 calculator with simple, sum, and expression modes. Features a modern UI with theme and language support.
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utils/calculator.html
A multi-function tool with a stopwatch, countdown timer, and a live clock. Supports multiple languages and light/dark themes.
Simple and elegant to-do list with task management, completion tracking, and multilingual UI support (EN/PT/JA).
Hierarchical notebook with Project, Book, and Sheet organization. Features collapsible navigation, content search, IndexedDB persistence, and multilingual UI (EN/PT/JA).
Create multiple-choice questions with Project, Test, and Question hierarchy. Export/import JSON, export rendered TXT/HTML with or without answers, bilingual options, editable export CSS. IndexedDB storage, search (test/project/all).
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utils/test_builder.html
Presentation editor with Project, Folder, Document structure. Slides support text, images, YouTube video, shapes and lines; fullscreen presentation mode; templates and zzSlideSystem for shared templates/backgrounds.
Audio player with two-level folders, IndexedDB storage, and drag-and-drop. Tracks have editable name and description/lyrics; optional continue-to-next per subfolder; full player controls and volume.
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utils/audio_player.html
Clipboard management tool with multiple workspaces, drag & drop organization, and import/export functionality. Features edit and drag modes.
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utils/copy_tool.html
Create and display customizable full-screen messages with adjustable colors, font sizes, and shadows. Features multilingual UI and theme support.
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utils/fullscreen_message.html
Generate strong, random passwords with customizable options, or create "hacker-style" passwords from a word. Supports multiple languages and themes.
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utils/password_generator.html
Convert JavaScript code to visual flowcharts using Monaco editor and Mermaid. Supports if/else, loops, function calls, and console.log. Features multilingual UI and localStorage persistence.
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utils/code_flow.html
Run JavaScript in a sandbox iframe with canvas and captured console. Multilingual UI (EN/PT/JA), light/dark theme, and code saved in localStorage.
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utils/code_runner.html
Real-time Forex market times display with Tokyo, London, and New York markets. Shows local time, server time, and hours to open/close for each market. Features multilingual UI (EN/PT/JA) and theme support.
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utils/forex_times.html
Display multiple world clocks with timezone search, autocomplete, and real-time updates. Features multilingual UI (EN/PT/JA), theme support, and persistent clock configurations.
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utils/world_clocks.html
Interactive bitwise operations converter with decimal, binary, and hexadecimal representations. Features checkboxes for bit manipulation, multilingual UI (EN/PT/JA), and theme support.
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utils/bitwise_converter.html
Prompt template expander: write an input with {V1..V5}, fill lists, and generate all combinations. Uses URL hash to scope localStorage.
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utils/prompt_concat.html
Split text by --- into cards, auto-attach context when terms match. Copy individual or all cards. Uses URL hash to scope IndexedDB storage.
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utils/prompt_context.html
Calculate time differences between two dates with results in hours and minutes, total minutes, and total seconds. Features multilingual UI (EN/PT/JA) and theme support.
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utils/time_diff.html
Calculate data transfer rates in MB/s and Mbps based on size and time.
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utils/band_calc.html
Advanced image collage editor with layers, blend modes, filters, eraser tool, and export functionality. Features undo/redo, zoom controls, and multilingual UI (EN/PT/JA).
Paste, upload, or drag-and-drop images onto a white canvas. Add rectangles, rounded rectangles, lines, arrows (with draggable endpoints), and text. Configure border and shadow for all objects. Context menu: bring to front, send to back, duplicate, delete. Multilingual UI (EN/PT/JA) and light/dark theme.
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utils/paste_canvas.html
Export all localStorage and IndexedDB data as a single JSON backup file. Restore from a backup to migrate data between browsers or devices. Supports merge and full replace modes. Handles binary data (Blobs, ArrayBuffers).