Self-Destructing Note Creator - Online Write & Burn Encrypted
Write a note encrypted with a passphrase, share the link. Once opened and decrypted, the note is deleted from browser storage. Local only.
UD5 Toolkit
Transform your digital text into realistic handwritten pen notes — online & free
Preview updates automatically. Click download to save as PNG.
Write a note encrypted with a passphrase, share the link. Once opened and decrypted, the note is deleted from browser storage. Local only.
Convert a numeric amount into English words, perfect for writing checks or legal documents. Supports USD/GBP styles.
Type a number and see its full English word representation (e.g., 123 → one hundred twenty‑three). Supports large numbers.
Convert a number like 1234.56 to English words 'one thousand two hundred thirty-four and 56/100'. For checks.
Apply a color tint overlay over text to see if it helps reading comfort. Trial for visual stress.
Convert between currencies using manually updated or default rates. Great for estimation when offline. Local settings.
See exact mm and inch dimensions of ISO A-series and US paper sizes. Visual comparison tool. Also calculates weight based on GSM and dimensions.
Translate hexadecimal numbers to decimal integers. Instantly see the magnitude. A simple, private utility for developers and mathematicians.
Convert any English text to Pig Latin. Simple word play. Works offline.
Convert annual salary to effective hourly rate considering holidays, vacation, and work hours per week.
Paste a line of poem and see which syllable stresses create a particular meter. Educational tool.
Convert any text to a long string of binary digits. Perfect for learning binary representation. Local conversion.
Change the sample rate of an audio file (e.g., 48kHz to 44.1kHz) without leaving the browser. Ideal for podcast prep.
Draw perfect ellipses by dragging focal points and a point on the curve. See the equation update dynamically. Educational.
Get a random tattoo concept with style and placement suggestion. For fun and inspiration only. Not real art.
Convert currencies using a built‑in table of approximate fixed rates. Useful for quick estimates without live data. Local.
Create custom flashcards and review them with a simple spaced repetition algorithm. Data stored in your browser. No sign-up required.
Type a word and see if it can be spelled using chemical element symbols. Geeky custom message creator. Copy or share.
Calculate the area of an irregular polygon by entering its vertex coordinates. Uses the shoelace formula. Pure math.
Select a destination language and generate a printable mini phrasebook with essential greetings, directions, food, and emergency phrases. Local only.
Find the currency code (USD, EUR, JPY) for any country or reverse‑lookup the country from a code. Static reference.
Select tuning, scale length, and string gauge to calculate total tension on the neck. Build custom string sets.
A kanji appears; you guess how many strokes it has. Learn stroke order awareness.
Try to draw a perfect circle freehand. Score based on roundness. Fun and addictive. No data sent.
Measure a ring's inside diameter or circumference and convert to US, UK, European, and Japanese sizes.
Type a word to see all its homophones with definitions. Avoid embarrassing mistakes (their/there/they’re). Static dictionary.
Design circular string art by ticking nails and seeing simulated thread lines. Adjust number of nails and steps. Export pattern. Local only.
Solve random arithmetic problems under a time limit. Track your score and improve mental calculation. No data collected.
Enter number of eyelet pairs and lacing style to find the correct shoelace length in inches/cm. Never buy too short.
Convert text between various programming case styles. Includes SCREAMING_SNAKE, PascalCase, etc.