QR Code Generator - Free Online QR Creator
Create high-quality QR codes for URLs, text, Wi-Fi, and contact info. Customize colors and size. Download as PNG/SVG. No data leaves your device.
UD5 Toolkit
Online Brainwave Focus & Relax â Enhance Your Mental State
Left: 200 Hz | Right: 210 Hz | Beat: 10 Hz
Use stereo headphones for best effect
Create high-quality QR codes for URLs, text, Wi-Fi, and contact info. Customize colors and size. Download as PNG/SVG. No data leaves your device.
Generate a QR code from any text, URL, or contact details. Save as PNG, SVG, or copy to clipboard. All local.
Create QR codes with custom colors, gradients, and an embedded logo. Download as high-quality PNG/SVG. Fully local generation.
Generate a selfâsigned X.509 certificate and private key for local development. All created in your browser. No server involved.
Interactive soprano recorder chart showing which holes to cover for each note. Switch between baroque and German fingering.
Click on a fold technique (spiral, crumple) and see a predicted color pattern. Print folding guide.
Add Vietnamese diacritics to plain text by selecting tones. Remove them from text. For language learners.
Generate a QR code with a custom icon or logo in the center. Choose error correction level. Download as highâres PNG.
Eliminate duplicate lines from text instantly. Keep only unique lines or see which lines were removed. Handy for cleaning email lists and raw data.
Test your knowledge of the NATO phonetic alphabet. Timed quiz with letterâtoâcode and codeâtoâletter modes.
Paste text and instantly see every character's decimal and hex ASCII/Unicode code point. Supports emojis and symbols.
Apply a classic Caesar shift cipher with any key. Encrypt or decrypt text instantly. Brute force option included.
Test yourself on international calling codes. Random country, type the code. Or reverse. Perfect for travelers.
Convert any text to proper sentence case. Capitalize the first letter after every period, question mark, or exclamation.
Look up quick facts about any country: capital, population, currency, flag, and continent. Static data, fast search. Great for travel and education.
Identify countries from their flags. Multiple difficulty levels and regions. Track your high score. Educational geography game. Works offline.
Random world flags shown; pick the correct country name from four choices. Score and streak. Learn geography.
Generate continuous white, pink, or brown noise for sleep or concentration. Adjustable volume with offline support via Web Audio API. No downloads needed.
Design a custom focus indicator with outline, offset, and boxâshadow. Preview on interactive elements. Copy the CSS.
Enter a URL and see a visual map of the tab order. Detect broken tabindex values. Improve keyboard navigation.
Pomodoro timer that saves completed sessions to localStorage. View daily/weekly stats. Boost productivity with data.
Mix white noise, pink noise, rain, thunder, wind, and cafe sounds. Individual volume, save presets. Relax or focus. All clientâside.
Fullâscreen random colour changes at a slow pace. Use it as a dynamic background for meditation or focus.
Set three big tasks for the week, top priority, habit trackers, and notes. Print or screenshot. Minimalist.
Enter a URL and extract tabâindex order violations and focusable elements. Quick accessibility audit. Clientâside fetch.
Mix multiple ambient sounds (rain, fireplace, cafe, forest) at different volumes. Create your perfect background noise. Local loops.
Pomodoro timer with builtâin loâfi music playlist (synthetic). Focus and rest cycles. No copyright music; generated tones.
Combine a Pomodoro timer with a simple task list. Assign estimated Pomodoros to tasks and track completions. Boost focus and get things done.
Boost your productivity with the Pomodoro technique. Customizable work and break intervals with desktop notifications. Simple, clean, and works offline.