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Tools & Utilities
Calculators, converters, design tools, and productivity apps
Practical utilities for everyday use. Timers, converters, color pickers, and design helpers.
110 experiments
⌚
Clocks
Analog, binary, polar, and word clocks. Four ways to see time pass.
Time
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Regex Playground
Real-time regex testing with match highlighting, capture groups, replace mode, and quick reference.
Tool
⏱
Timer Suite
Stopwatch with laps, countdown timer with ring progress, and Pomodoro (25/5/15 cycles).
Tool
ℂ
Binary Converter
Convert between decimal, binary, octal, hex. Clickable bit toggles, bitwise ops, IEEE 754 breakdown.
Tool
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Cryptography
Caesar, Vigenere, ROT13, Atbash, rail fence ciphers. Frequency analysis and Base64.
Tool
✎
Markdown Editor
Side-by-side markdown editor with live preview. Toolbar, syntax highlighting, copy HTML output.
Tool
◉
Color Picker
HSV color wheel with HEX/RGB/HSL/CMYK conversion. Color harmonies and saveable palette.
Design
{}
JSON Formatter
Format, minify, validate, and explore JSON with syntax highlighting and tree view.
Tool
⇌
Unit Converter
9 categories: length, weight, temperature, area, volume, speed, time, data, energy. 80+ units.
Tool
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Password Generator
Cryptographically secure random passwords, passphrases, PINs. Strength meter and history.
Tool
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Shadow Generator
CSS box-shadow builder with multiple layers, presets, and live preview.
Design
✔
Habit Tracker
Daily habit tracking with streaks, completion rates, and monthly calendar view.
Tool
√
Scientific Calculator
Full scientific calculator with trig, log, memory, history, and keyboard input.
Tool
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Lorem Ipsum
Placeholder text generator with 4 styles: Latin, Horatian, Hipster, and Tech.
Tool
⭕
Mind Map
Visual brainstorming tool with drag-and-drop nodes, color branches, and PNG export.
Tool
A
Typography
Font explorer with 10 Google Fonts. Size, spacing, weight, shadow controls and CSS output.
Design
⏲
Focus Timer
Pomodoro timer with ambient sounds (rain, white noise, binaural beats). Session tracking and streaks.
Tool
⬜
Flexbox Playground
Interactive CSS flexbox explorer. Toggle every property, see results live, copy CSS output.
Design
⛅
Weather Observatory
Simulated weather dashboard with animated icons, 7-day forecast, sun arc, and AQI for 12 cities.
Tool
🧭
Digital Compass
Interactive compass with manual drag and device sensor modes. Save waypoints with bearings.
Tool
⏳
Countdown Timer
Count down to any event with days/hours/minutes/seconds display. Save multiple countdowns, preset events, progress bar.
Tool
👁
Color Vision Simulator
See how images appear with protanopia, deuteranopia, tritanopia, and achromatopsia. Upload images, use camera, or test patterns.
Tool
🕰
World Clock
Analog and digital clocks for 8+ time zones. Auto-updating with day/night indicators and date display.
Tool
🎲
Dice Roller
RPG dice roller supporting d4-d100 with dice notation parsing, advantage/disadvantage, roll history, and statistics.
Tool
🌈
Gradient Generator
CSS gradient builder with linear, radial, and conic types. Draggable color stops, angle control, presets, copy CSS.
Tool
🔍
Regex Tester
Regular expression tester with live match highlighting, flag toggles, common patterns library, and cheat sheet.
Tool
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BMI Calculator
Body Mass Index calculator with metric and imperial units. Visual bar chart with category ranges and health info.
Tool
🍅
Pomodoro Timer
Customizable Pomodoro technique timer with task list, session dots, auto break switching, and audio alerts.
Tool
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Unit Converter
Convert between 10 categories of units: length, weight, temperature, speed, and more.
Tool
⏱
Stopwatch
Precision stopwatch with lap tracking, best/worst highlighting, and animated ring display.
Tool
💻
Binary Clock
Real-time clock displayed in binary. BCD and true binary modes, 12/24 hour toggle.
Tool
🔒
Password Generator
Cryptographically random passwords with strength meter, passphrases, and history.
Tool
✍
Markdown Preview
Split-pane Markdown editor with live preview, toolbar, and word count stats.
Tool
⌨
Type Racer
Typing speed test with WPM, accuracy tracking, multiple difficulties, and history.
Tool
📊
Chart Maker
Create bar, line, pie, donut, and scatter charts with editable data and PNG export.
Tool
✔
Habit Tracker
Weekly habit grid with streak tracking and localStorage persistence.
Productivity
💻
System Info
Browser, display, hardware, network, and feature detection.
Utility
↔
Text Diff
LCS-based line diff with add/delete/same highlighting.
Utility
💰
Budget Tracker
Track income and expenses with categories and charts.
Productivity
📝
Notepad
Multi-tab note-taking with auto-save, download, and font options.
Productivity
📋
Kanban Board
Drag-and-drop task management with columns and priority colors.
Productivity
😀
Emoji Picker
Search and copy emojis by category with recently used tracking.
Utility
🔢
Word Counter
Text analysis with word frequency, readability score, and stats.
Utility
⏳
Event Countdown
Customizable countdown timer with presets, saves, and progress bar.
Utility
💱
Currency Converter
Convert between 20+ currencies with swap and conversion history.
Utility
🍳
Recipe Scaler
Scale recipe ingredients with fraction support and unit conversion.
Utility
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Tip Calculator
Calculate tips with percentage presets, bill splitting, and rounding.
Utility
🕒
Analog Clock
Beautiful analog clock with Roman numerals and multiple face styles.
Utility
⌨
Keyboard Tester
Test every key with visual keyboard layout and coverage tracking.
Utility
⭐
Favicon Generator
Create favicons from text, emoji, or shapes with live preview.
Design
🔤
Font Pairing
Find perfect font combinations for your designs.
Design
📏
Resistor Calculator
Decode resistor color bands with visual reference chart.
Electronics
🎨
CSS Filter Lab
Real-time CSS filter playground with presets and code export.
Design
█
Progress Bar Generator
Design CSS progress bars with solid, gradient, striped, and animated styles.
Design
▭
Aspect Ratio Calculator
Calculate ratios, resize dimensions, and browse common formats.
Utility
☃
Character Map
Browse Unicode characters by category with click-to-copy.
Utility
▣
QR Code Generator
Generate QR codes from text and URLs with customization.
Utility
⌚
Chess Clock
Dual timer with Fischer increment and time control presets.
Utility
🌈
Color Wheel
Interactive HSL color wheel with harmony and format display.
Design
🔠
Text Case Converter
Convert between 13 text cases: camelCase, snake_case, UPPER, and more.
Utility
📅
Date Calculator
Date difference, age calculator, business days, and date math.
Utility
🎬
CSS Animation Generator
Visual keyframe editor with presets and CSS code export.
Design
⚡
Browser Speed Test
Benchmark your browser's JavaScript performance across 8 tests.
Utility
⬣
SVG Maker
Draw vector shapes and export SVG code with undo support.
Design
🌈
Color Blend
Mix colors with blend modes and generate gradients with WCAG contrast.
Design
📖
Reading Time Calculator
Estimate reading time with Flesch readability analysis.
Utility
🔤
Type Scale
Typography scale generator with ratio presets and CSS export.
Design
🖼
Pixelate
Apply pixelation effects to images with adjustable block size.
Tool
📊
CSV Tool
View, edit, sort and filter CSV data in a spreadsheet-like interface.
Tool
🔍
Regex Playground
Interactive regex tester with match highlighting, groups, and presets.
Tool
💾
Hex Editor
View text as hexadecimal with offset and ASCII display.
Tool
🎨
Eyedropper
Pick colors from generated gradients with palette building.
Tool
📐
Flexbox Playground
Interactive CSS flexbox property explorer with live preview.
Tool
🌈
Gradient Generator
Create and customize CSS gradients with live preview.
Design
📝
Code Editor
Write and run JavaScript in the browser with tabs and examples.
Tool
🎨
Color Harmony
Color wheel with complementary, triadic, and analogous harmonies.
Design
☷
Grid Maker
Create custom grid layouts with flexible row and column configurations.
Design
☀
Light Table
Compare images side by side with overlay and difference modes.
Design
⏳
Countdown Timer
Count down to any event with presets, saved timers, and live progress.
Utility
𝖠
Font Preview
Preview text in 22 system and web fonts with adjustable size, weight, and spacing.
Design
▒
Pixel Font
Design pixel typefaces on an 8x8 grid with live text preview.
Design
⮕
Flowchart Maker
Drag-and-drop flowchart editor with shapes, connections, and PNG export.
Productivity
•
Morse Translator
Translate between text and Morse code with audio playback.
Utility
⇩
Speed Reader
RSVP speed reading with focus letter highlighting and WPM control.
Productivity
🏆
Bracket Builder
Create single-elimination tournament brackets with click-to-advance.
Utility
⬣
SVG Icon Builder
Compose SVG icons from basic shapes with code export.
Design
⏲
Recipe Timer
Multi-step cooking timer with alerts and presets.
Utility
⚡
Ohm's Law
Circuit calculator with visual meter and resistor color bands.
Electronics
🔐
Text Encoder
Encode and decode text in Base64, hex, binary, ROT13, and more.
Utility
🔌
Logic Circuits
Build logic gate circuits with real-time signal propagation.
Electronics
🎨
CSS Filter Lab
Experiment with CSS image filters and export the code.
Design
🍅
Pomodoro Pro
Focus timer with circular progress, task lists, and session tracking.
Productivity
📏
Graph Paper
Generate printable grid paper in square, isometric, hex, and dot styles.
Utility
🎨
Color Mixer
Blend colors with additive, subtractive, and average modes.
Design
🎯
Life Goals
Track aspirations with categories, progress bar, and persistence.
Productivity
🌈
Gradient Maker
Build CSS gradients with color stops and export code.
Design
😀
Emoji Search
Search, browse, and copy emojis by category and keyword.
Utility
🪢
Knot Guide
12 essential knots with step-by-step instructions and categories.
Practical
▣
QR Code Studio
Generate QR codes for text, URLs, WiFi, email, and phone numbers.
Utility
▦
SVG Patterns
Generate repeating SVG tiling patterns.
Design
⚡
Resistor Calc
Decode resistor color bands to values.
Electronics
★
Symbol Chart
Browse and copy Unicode symbols with codes.
Utility
A
Font Stack Builder
Preview and build CSS font stacks.
Design
📚
Virtual Bookshelf
Organize your reading list with visual book spines.
Utility
💠
Text Shadow Lab
Design layered CSS text shadows with presets.
Design
🎨
CSS Color Names
Browse all 148 named CSS colors with search and sort.
Design
□
CSS Box Model
Interactive CSS box model with margin, border, padding controls.
Design
✂
CSS Clip Path
Create and preview CSS clip-path shapes.
Design
📏
CSS Units
Convert between all CSS length units with reference.
Design
🌍
Time Zones
World clocks, time conversion, and timezone timeline.
Utility
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