UD5 Toolkit
Hijri to Gregorian Converter – Online Umm al‑Qura Estimate
Convert dates between Hijri and Gregorian using the Umm al‑Qura algorithm. Approximate local moon sighting may vary.
Markdown to HTML Converter - Online MD to Webpage Tool
Hello World
Upside Down Text Converter - Online Flip Letters & Words
Convert any text to upside down (flipped) characters using Unicode mappings. Copy and paste to social media. 100% local, no data sent.
CMYK to Pantone Converter - Online Approximate Match
Enter CMYK values and find the closest Pantone Solid Coated color. For print design reference. Client‑side lookup.
Emoji to Image Converter - Online Download Emoji as PNG
Pick any emoji and download it as a high‑resolution PNG image with transparent background. For social media or icons.
Web Image Size Calculator - Online KB & Dimensions Tool
Predict the file size of an image based on pixel dimensions and format (JPEG, PNG, WebP). Rough estimate. Local.
Color to CIELAB Converter - Online Perceptual Space
Convert hex or RGB to CIELAB L*a*b* values. Understand perceptual lightness and color opponents. Local math.
Static Currency Converter - Online Fixed Rates Table
Convert currencies using a built‑in table of approximate fixed rates. Useful for quick estimates without live data. Local.
Markdown to Rich Text - Online Copy for Google Docs
Convert Markdown to styled HTML that retains formatting when pasted into Google Docs or Word. Headings, bold, lists. Client‑side.
Color Image to ASCII Art - Online True Color Converter
Convert any image into colored ASCII art using divs with background colors. Creates a stunning text‑based replica. View & copy HTML.
Korean Romanization Tool - Online Hangul to Latin
Type or paste Korean Hangul and see the revised romanization. Also works backwards for basic words. Study aid.
CSV to HTML Table - Online Generate Responsive Code
Paste CSV and get a beautiful HTML table with sortable headers (optional). Copy the full HTML/CSS snippet. Local.
Color Temperature to RGB - Online Kelvin to Hex Converter
Enter a Kelvin value (1000‑40000) and see the approximate white‑balance color. Photography and lighting reference.
Number to Words Converter - Online Write Out Currency
Convert a numeric amount into English words, perfect for writing checks or legal documents. Supports USD/GBP styles.
Hijri to Gregorian Date Converter - Online Islamic Calendar
Convert between Gregorian and Hijri (Islamic) dates. Approximate visual reference. Local algorithm.
Julian Date Converter - Online Calendar to JD
Convert a Gregorian calendar date to its Julian Day Number and vice versa. Used in astronomy and mainframe computing.
Audio to Base64 Converter - Online Embed Sound in HTML
Encode short audio clips into Base64 data URIs for direct embedding in HTML5 <audio> tags. No external files needed.
Gray Code Converter - Online Binary to Reflected Code
Translate between binary and Gray code (reflected binary code). See the bit changes. Useful for digital logic.
Signed Magnitude Converter - Online Negative Binary Numbers
Encode decimal integers into signed magnitude binary representation and decode back. Learn computer arithmetic.
Decimal to IEEE 754 Converter - Online Float Representation
Convert a decimal number to 32-bit single precision IEEE 754 format. See sign, exponent, mantissa bits. Developer tool.
Roman Numeral Date Converter - Online MMXXVI Style
Convert any date into Roman numerals (day‑month‑year) for tattoos or special occasions. Clean and local.
Minutes to Decimal Hours - Online Time Conversion Tool
Convert minutes to decimal hours and vice versa. Essential for billing and payroll. Instant conversion with a handy chart.
Radiation Converter - Online Gray Rad Rem & Sievert
Convert between units of absorbed dose and equivalent dose (Gray, Rad, Rem, Sievert). Educational and reference. Local calculation.
Angle Precision Converter - Online DMS to Degree & Radian
Convert between decimal degrees, degrees-minutes-seconds (DMS), radians, and grads. High-precision for surveying and navigation. Local tool.
Torque Converter - Online Newton-Meter & Foot-Pound Tool
Convert torque units between Newton-meter, foot-pound, inch-pound, and more. Essential for mechanics and engineers. Instant local conversion.
Audio Converter - Online Convert WAV MP3 OGG Locally
Convert audio files between popular formats like WAV, MP3, and OGG directly in the browser. No upload, fast encoding using WebAudio and ffmpeg wasm.
HTML to Markdown Converter - Online Clean Content Extractor
Strip HTML tags and convert web content to plain Markdown. Preserve headings, lists, and links. Perfect for content migration. All processing in browser.
JSON to CSV Converter - Online Free Data Translator
Easily convert JSON data arrays into CSV format for Excel or database import. Handles nested structures with flattening options. All conversions happen locally, no data uploaded.
Pressure Converter - Online Bar PSI Pascal Atmosphere Tool
Convert between common pressure units: Pascal, Bar, PSI, atmosphere, and Torr. Useful for engineering and weather enthusiasts. Local calculation.
Unix Timestamp Converter - Online Epoch & DateTime Tool
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds and milliseconds. Ideal for developers debugging time-related code.
Image to ASCII Art Generator - Online Text Picture Converter
Convert any image into beautiful ASCII art. Adjust brightness and character set for the best effect. Share text-based pictures. Runs entirely in the browser.