UD5 Toolkit
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.
Converters - Format & Unit Conversion
99+ toolsJulian 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.
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.
Roman Numeral Date Converter - Online MMXXVI Style
Convert any date into Roman numerals (day‑month‑year) for tattoos or special occasions. Clean and local.
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.
Hijri to Gregorian Date Converter - Online Islamic Calendar
Convert between Gregorian and Hijri (Islamic) dates. Approximate visual reference. Local algorithm.
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.
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.
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.
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.
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.
Color Inversion Calculator - Online Exact Opposite Hue
Get the exact RGB inversion (negative) of any color. Useful for dark mode theming and high‑contrast accessibility checks.
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.
PDF Text Extractor - Online Copy Text from PDF Locally
Extract selectable text from a PDF using the browser's built‑in PDF rendering. Copy or download as TXT. No upload, fully private.
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.
Hex to Float Converter - Online IEEE 754 Decoder
Enter a hexadecimal string and decode it as a 32‑bit or 64‑bit floating‑point number. Low‑level developer tool.
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.
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.
Webpage to PDF - Online Print & Save as Document
Enter a URL and instantly generate a PDF version using the browser's print-to-pdf engine. Private, no upload.
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.
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.
CIELAB to RGB Converter - Online Bring Color Back
Enter L*a*b* values and see the corresponding RGB and hex color. Useful for advanced color manipulation.
Text to ISO Date Converter - Online Parse Any Date String
Paste a human‑readable date (like 'next Friday' or 'March 5, 2023') and convert it to ISO 8601 format. Quick and tolerant.
Audio Sample Rate Converter - Online Resample WAV/MP3
Change the sample rate of an audio file (e.g., 48kHz to 44.1kHz) without leaving the browser. Ideal for podcast prep.
Text to Braille Converter - Online Grade 1 & 2 English
Convert English text to Braille (Grade 1 and simple Grade 2 contractions). Educational tool to understand Braille representation. Local only.
JSON List to CSV - Online Flat Array Converter
Convert a JSON array of strings or numbers into a single‑column CSV. Quick data dump. Local.
PNG to ICO Converter - Online Favicon Maker
Convert any PNG image into a proper .ico favicon file with multiple sizes embedded. For website icons. Local.
Date to Unix Epoch Converter - Online Human to Timestamp
Convert any human‑readable date to a Unix timestamp in seconds or milliseconds. Also shows ISO 8601. Clean interface.
Image to SVG Path - Online Trace Bitmap to Vector
Convert a simple black and white image into an SVG path using edge detection. Extract vector outlines. Local canvas processing.
Number Base Converter - Online Binary Octal Decimal Hex
Convert numbers between binary, octal, decimal, and hexadecimal bases. See real-time conversion as you type. Clean and simple programmer utility.
HTML Table to Markdown Converter - Online Quick Transform
Paste an HTML `<table>` snippet and instantly get a clean Markdown table. Supports colspan and alignment hints. Local.
UwU / OwO Text Converter – Online Furry Speak Generator
Transform normal sentences into cutesy UwU speak. Customizable intensity. Internet fun.
Data URL to File Downloader - Online Decode & Save
Paste a data: URL and instantly download the file it represents. Supports all MIME types. Simple extraction.
Running Shoe Size Converter - Online US UK EU CM Chart
Convert running shoe sizes between US (men/women), UK, EU, and centimeters. Also includes brand-specific fit notes (general guide).
Images to PDF Merging - Online Combine & Order
Combine JPGs and PNGs into a single PDF. Drag to reorder pages. All processing happens locally; your files never leave your device.
Currency Converter - Online Exchange Rate (Manual Update)
Convert between currencies using manually updated or default rates. Great for estimation when offline. Local settings.
RGB to CMYK Converter - Online Print Color Translator
Convert screen RGB colors to print-ready CMYK values. Understand color shifts before printing. Ideal for graphic designers preparing artwork for press.
PX to VW/VH Converter - Online Responsive Unit Calculator
Convert pixel values to viewport‑relative units (vw, vh, vmin, vmax) based on a selected breakpoint. Precise responsive design.
Two's Complement Converter - Online Binary Negative Encoder
Convert decimal negative and positive numbers to 8/16/32-bit two's complement binary. Essential for low-level programming.
RGB to HEX Converter - Online Color Translator
Convert RGB and RGBA color values to their HEX or HEX+alpha representation. Live preview and copy CSS color strings instantly.
Nautical Mile & Knot Converter – Online Marine Units Tool
Convert between nautical miles, statute miles, kilometers, and knots to mph/kmh. Essential for navigation.
HTML to Pug Converter - Online Indented Template Syntax
Convert standard HTML into Pug (formerly Jade) syntax. Clean, indented output. For Node.js templating. Client‑side.
JSON to Excel (.xlsx) Converter - Online Spreadsheet Creator
Paste a JSON array of objects and download a properly formatted .xlsx Excel file. No server; uses SheetJS in the browser.
Arabic to Kanji Number Converter - Online 一 二 三
Convert standard Arabic numbers into formal Japanese/Kanji numerals (e.g., 123 → 百二十三). Also supports large numbers.
Images to PDF Merger - Online Combine JPG/PNG into One
Select multiple images, arrange their order, and merge them into a single PDF document. Works offline in your browser.
Video to GIF Converter - Online Create Animated Images
Trim a video clip and convert it into an animated GIF. Adjust frame rate and size. Processing stays on your computer for privacy.
Roman Numeral Date Converter - Online MMXXV Style
Convert any date into Roman numerals (day‑month‑year) for tattoos or special occasions. Clean and local.
JSON‑LD to Turtle Converter - Online RDF Format
Convert JSON‑LD structured data into Turtle (TTL) notation. For semantic web and linked data developers. Client‑side.
High Quality Video to GIF - Online Optimized Converter
Convert short video clips to GIFs with adjustable resolution, frame rate, and dithering. Preview before download. All local.
Text to NATO Phonetic Alphabet - Online Converter
Convert any phrase into the NATO phonetic alphabet (Alpha, Bravo, Charlie…). Copy or hear pronunciation. Useful for call centers.
Hex to Decimal Converter - Online Base 16 to 10 Tool
Translate hexadecimal numbers to decimal integers. Instantly see the magnitude. A simple, private utility for developers and mathematicians.
Aircraft Tail Number to Phonetic Callsign – Online Convert
Enter a registration (e.g., N123AB) and convert to the standard phonetic callsign. Aviation enthusiast tool.
Image to WebP Converter - Online Bulk Optimize
Convert images to WebP format with configurable quality. See file size savings. Batch process multiple files. All local.
HTML to React JSX Converter - Online Transform Tags
Paste regular HTML and instantly get valid React JSX with proper self‑closing tags and className attributes.
Video to Audio Extractor - Online Save MP3 from MP4
Extract the audio track from any video file and download it as MP3 or WAV. Works offline; no server upload.
HTML Fragment to PDF - Online Print Custom Section
Write or paste an HTML snippet and generate a PDF using the browser's print engine. Customize page size and margins.
Video to Animated WebP - Online Free Converter
Select a short video and convert it to an animated WebP image for faster web loading. Adjust quality and size. Local only.
CSV to Wiki Table Converter - Online MediaWiki Markup
Paste CSV data and instantly get a formatted MediaWiki table code. Ideal for Wikipedia editors and internal wikis.
AM/PM to 24‑Hour Time Converter - Online Military Time
Instantly convert 12‑hour AM/PM time to 24‑hour format and vice versa. Simple and essential for travelers.