Easy Timer (www.oh-benri-tools.com)
A simple online timer with one-click time setting. Choose from presets ranging from 30 seconds to 60 minutes, with adjustable alarm sound type and volume. Fullscreen display supported.
Duplicate Line Remover & Checker (boost-tool.com)
A free online tool to remove, check, and extract duplicate lines from text data in real time. Displays input/output line counts and deletions, supporting text, CSV, and log files. All processing happens locally on your device.
Dummy Text Generator (toolpods.io)
Generate dummy text (Lorem Ipsum, Japanese dummy text, etc.) for use in design prototypes.
Dummy Image Generator (lazesoftware.com)
Creates placeholder images for mockups in PNG, WebP, JPEG, GIF, BMP, or SVG format. Supports sizes up to 4096×4096px with customizable background patterns, filters, transparency, borders, and text overlays with multilingual font support.
Dummy Image Generator (web-toolbox.dev)
Free tool for generating dummy images with a specified size, background color, and text color. Perfect as placeholder images during web development and design prototyping.
Dummy Data Generator (toolpods.io)
Generate dummy data for testing. Output names, emails, phone numbers, and other formats in any quantity.
Drill Generator (lazesoftware.com)
Auto-generates English vocabulary and math drills. English covers 60+ categories (numbers, months, days, colors, animals); math covers addition, subtraction, multiplication, and division. Supports flashcard display and print output.
drawDB
Free and open-source online database diagram editor and SQL generator. Design tables and relationships with drag-and-drop, then export DDL for MySQL, PostgreSQL, SQLite, MariaDB, or SQL Server. No sign-up required.
Draw Lots (www.piliapp.com)
An online lot-drawing tool for fair random selection. Enter options and draw lots to randomly pick one, useful for deciding turns, assignments, or prizes.
Download Emoji Images (www.piliapp.com)
An online tool to download emoji images as PNG files. Browse all emoji and download high-quality images for use in design projects, presentations, and documents.
Division Challenge (divided.onl.jp)
A math practice web app where you solve division problems within a time limit. Great for improving children's arithmetic skills or as a brain workout for adults, with score tracking.
Distance Measurement Web (measure.onl.jp)
A web tool to measure the distance between two points in real time using GPS in the browser. Useful for tracking travel distance during walks and exercise.
