UD5 Toolkit
Auto Dark Mode Scheduler – Online Custom Time Switch
Set times to automatically switch light/dark theme on any website using a bookmarklet or live demo.
General Utilities - Everyday Helpers
68+ toolsBoard Game Score Keeper – Online Customizable Point Tracker
Add player names and tap +/- to track scores. Custom starting points. Works for any game.
Minimum Time Zone Clock - Online World Time at a Glance
See current time in multiple pre-selected cities simultaneously with day/night indicators. No tracking, just a simple multi-clock.
On‑Screen Pixel Ruler - Online Measure Elements in Browser
Drag a virtual ruler across your screen to measure pixel distances. Horizontal and vertical guides. Useful for UI designers checking alignment.
Audio/Video Snippet Recorder - Online Temporary Share
Record a short audio or video snippet and get a shareable link (stored locally in browser, no server). For quick feedback.
Screen Color Depth Checker - Online 8‑bit vs 16‑bit
See your monitor's color depth and pixel depth. Detect if HDR or wide gamut is available using media queries.
Keyboard Shortcut Visualizer - Online See macOS/Win Modifier Keys
Press any key combination and see the human‑readable shortcut for macOS and Windows. Developer docs helper.
JavaScript Object Diff Viewer - Online Compare Data
Paste two JSON objects and see a highlighted diff showing what was added, removed, or changed. For API testing.
Speaker Frequency Sweep - Online Audio Test & Ear Check
Play a sweep from 20Hz to 20kHz. Test your speakers and your hearing. Simple and effective. Web Audio API.
File Type from Magic Bytes Detector - Online Identify Unknown Files
Drop a file and see its detected type based on the first bytes (magic number). Identifies hundreds of formats. Local.
Online Audio Recorder - Record Voice & Export WAV
Record audio from your microphone and export as a WAV file. Monitor levels. Processed entirely in your browser.
Webcam Recorder - Online Capture Video & Save
Use your webcam to record a video clip and download it as WebM. Adjust resolution. Works offline. Privacy‑friendly.
Video Speed Controller - Online Slow Motion & Timelapse
Play any video at 0.25x to 4x speed. Save the modified speed as a new file. Perfect for analysis or fun.
User Idle Time Display - Online See Seconds Since Activity
Shows a counter of how many seconds you have been idle. Tracks mouse and keyboard activity without recording.
Notification Permission Checker - Online Manage & Test
See your current notification permission status. Request or reset it. Test browser notification behavior.
Audio/Video Sync Tester - Online Lip Sync Check
Load a video and visually check if audio aligns with lips. Use frame‑by‑frame stepping. Debug playback issues.
Clipboard Image Paste Demo - Online Ctrl+V to Preview
Press Ctrl+V to paste an image from your clipboard into the page. See dimensions and download. Simple utility.
Video Keyframe Extractor - Online Capture I‑Frames
Seek through a video and extract only keyframes as JPEGs. Perfect for generating thumbnails. Canvas‑based.
Geolocation to Address - Online Reverse Geocode
Enter latitude and longitude and get a human‑readable address using the browser's built‑in reverse geocoding (if available).
AES Text Encrypt/Decrypt - Online Secure Message Tool
Encrypt and decrypt text using AES in the browser with a password. Uses Web Crypto API. No data sent to server.
Visual Image Diff Slider - Online Compare Two Photos
Drag a slider over two images to see the differences instantly. Perfect for showcasing retouches or compression effects.
Local JSON Data Explorer - Online Browser Storage Viewer
View, edit, and manage JSON objects saved in your browser's localStorage. Delete, export, or import keys. No setup.
Element Screenshot Tool - Online Crop & Capture DOM Node
Select any HTML element on a page and capture its screenshot. Download as PNG. Perfect for bug reports. JavaScript API demo.
Live Barcode/QR Scanner - Online Camera Decoder
Open your camera and scan barcodes or QR codes in real time. Uses ZXing JS. No data sent anywhere.
Online Audio Recorder - Record Voice & Export WAV
Record audio from your microphone and export as a WAV file. Monitor levels. Processed entirely in your browser.
Webcam Recorder - Online Capture Video & Save
Use your webcam to record a video clip and download it as WebM. Adjust resolution and see a preview. Works offline.
Webcam Color Detector - Online Live Hue Picker
Point your camera at an object and see the dominant color in real time. Click to copy the hex. Fun tool for designers.
Screen Wake Lock Tester - Online Keep Screen On
Toggle a screen wake lock to prevent the device from dimming or sleeping. See the lock state and learn the API.
Random Card Picker - Online Deck Draw & Shuffle
Click to draw random playing cards from a shuffled deck. The full deck is displayed. Use for decision or magic tricks.
All‑in‑One Unit Converter - Online 20+ Categories
Convert across length, mass, speed, temperature, data, and more. Search any unit and type. Compact and fast.
Live Binary Clock - Online Hex & Decimal Time
See the current time displayed in binary and hexadecimal. Dark theme, full‑screen mode. A geeky desk decoration.
Local Font Viewer & Preview - Online Test Styles
Browse the fonts installed on your system and type a custom phrase to see how it looks. Uses Local Font Access API where available.
Wake Lock API Tester - Online Prevent Screen Sleep
Request and release a screen wake lock to keep the device awake. See the lock state in real time. Perfect for recipes or presentations.
Battery Status API Viewer - Online Check Level
See your device's battery level, charging status, and discharge time using the Battery Status API. Fun utility.
Live Sound Frequency Detector - Online Audio Analyzer
Use your microphone to detect the dominant frequency of ambient sounds. Visualize the spectrum. Local Web Audio.
Bulk Text Line Sorter - Online A‑Z & Z‑A
Sort hundreds of lines alphabetically, reverse alphabetically, or by length. Deduplicate option. All local.
Image Strip Joiner - Online Combine Side by Side
Glue multiple images together horizontally or vertically into one long strip. Perfect for sharing comparisons. Local.
File to Base64 Encoder/Decoder - Online Download
Encode any file into a Base64 string that you can copy, or decode a Base64 string back to a downloadable file. Pure frontend.
QR Code Text Generator - Online Free Form Code
Generate a QR code from any text, URL, or contact details. Save as PNG, SVG, or copy to clipboard. All local.
Instant Image Slideshow - Online Local Photo Player
Select a folder of images and start a full‑screen slideshow right in your browser. Adjust interval and transition. No upload.
Reverse List Order - Online Flip Text Lines
Take a list of items and reverse the line order. The first becomes last. Simple and quick.
Emoji Extractor from Text - Online Pull Out Only Emojis
Paste a mixed text and get a list of only the emojis found within. Counts each unique emoji. Data cleanliness tool.
CSS Custom Property Extractor - Online List & Copy Root Vars
Paste your stylesheet and get a clean list of all custom properties defined under :root. Copy the whole block. Local analysis.
Audio Duration Viewer - Online Get Length Without Player
Drop an audio file and instantly see its duration in seconds and formatted time. Read metadata without full playback.
CSS Custom Properties Collector - Online List All :root Vars
Paste your CSS and get a sorted list of all custom properties defined under :root with their values. Quick audit.
Browser Speed Test - Online Measure Download/Upload
Measure your internet connection speed by downloading and uploading a small test file. Works from your browser.
Media Device Tester - Online Check Camera, Mic & Speaker
Quickly test if your webcam, microphone, and speakers work correctly. See live video and audio meter. No data sent.
Text File Merger - Online Combine Multiple TXT
Upload multiple text files and concatenate them into one, with optional separators. No upload; processed instantly.
Clipboard History Viewer - Online See Last Copies
A small widget that records your clipboard text history (only while open). Search and re‑copy old snippets. No log upload.
Virtual Corkboard - Online Sticky Notes & Memos
Create colorful digital sticky notes on a corkboard. Drag, edit, and delete. Notes persist in local storage. No login.
GIF Frame Extractor - Online Split Animated GIF into PNGs
Upload an animated GIF and download every single frame as a separate PNG image. See frame delays and total count. Entirely local.
Digital Binary Clock - Online Time in Bits Fullscreen
A beautiful full‑screen binary clock showing hours, minutes, seconds in glowing bits. Dark mode perfect for desks.
Screen Color Picker - Online Eyedropper with Magnifier
Use the browser's native eyedropper tool to pick any color from the screen. Shows zoomed preview. Quick and easy.
QR Code from Camera Snapshot - Online Freeze & Decode
Freeze your live camera, then scan a QR code from the static frame. Works when auto‑scan fails. Private.
File Name Sanitizer - Online Remove Invalid Characters
Paste a string and get a clean, safe file name by replacing forbidden characters. Works for Windows, Mac, Linux.
Image Format MIME Checker - Online Identify True Type
Drop an image that might have wrong extension and see its real format (JPEG, PNG, WebP) based on header bytes.
Battery Saver Dark Screen - Online Minimal Power Page
A completely black page to save battery on OLED devices. Click to go fullscreen. Simple utility.
Web Server Log Parser - Online Apache/Nginx Analyzer
Paste a raw server log snippet and see a structured table with IP, method, URL, and status. Quick audit.
Drag & Drop Order Tool - Online List Ranker
Reorder a list of items by dragging them. Paste a list, sort it by hand, and copy the new order. Simple.
Virtual Flashlight - Online Color & Strobe Screen
Turn your browser screen into a full‑color flashlight or strobe. Adjust brightness and color. Simple utility.