UD5 Toolkit
Crochet Hook Size Converter – Online US, UK, Metric, JP
Enter a hook size in any system and instantly see the equivalent in all other standards.
Tag: Converter - Format & Unit Conversion
99+ toolsBaking Pan Size Converter – Online Round, Square, Rectangle Volume
Enter an original pan size and find an alternative pan with the same batter volume. Never overflow or underfill.
Number to Ordinal (1st, 2nd, 3rd) – Online Multi‑Language
Enter a number and see its ordinal representation in English, Spanish, French, etc. Localized rules.
Ring Size Converter – Online Circumference/Diameter to US, UK, EU
Measure a ring's inside diameter or circumference and convert to US, UK, European, and Japanese sizes.
Hat Size Finder – Online Head Circumference to US/UK Size
Enter your head circumference in cm or inches and get the corresponding hat size in US, UK, and EU scales.
International Bra Size Converter – Online US, UK, EU, FR, AUS
Convert band and cup sizes between US, UK, European, French, and Australian systems. Accurate shopping abroad.
Slow Cooker Time Converter – Online High to Low & Stovetop
Convert a recipe from oven or stovetop to slow cooker (high/low) and vice versa. Perfect doneness.
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.
Climbing Grade Converter – Online V‑Scale to Font & YDS
Convert climbing difficulty between V‑scale, Fontainebleau, and Yosemite Decimal System. Quick reference for gym climbers.
Air Fryer Conversion Calculator – Online Oven to Air Fryer
Convert oven recipe temperature and time to air fryer settings. Quick reference.
Instant Pot Time Converter – Online Stove to Pressure
Convert traditional cooking time to electric pressure cooker time. Reference chart.
Leather Thickness Conversion – Online oz to mm Chart
Convert between ounces and millimeters for leather. Visual guide to common project thicknesses.
Number to English Words (Decimal) – Online Check Writer
Convert a number like 1234.56 to English words 'one thousand two hundred thirty-four and 56/100'. For checks.
Advanced Case Converter – Online snake_case camelCase kebab-case
Convert text between various programming case styles. Includes SCREAMING_SNAKE, PascalCase, etc.
Salary to Hourly Rate Converter – Online with Vacation Factor
Convert annual salary to effective hourly rate considering holidays, vacation, and work hours per week.
URL Query String to JSON – Online Parse & Format
Paste a full URL or query string and instantly get a pretty JSON object. Parse arrays and nested keys.
UwU / OwO Text Converter – Online Furry Speak Generator
Transform normal sentences into cutesy UwU speak. Customizable intensity. Internet fun.
Nautical Mile & Knot Converter – Online Marine Units Tool
Convert between nautical miles, statute miles, kilometers, and knots to mph/kmh. Essential for navigation.
CSS Color Converter All-in-One: Hex, RGB, HSL, OKLCH
Enter color in any CSS format and see all other representations. Live preview. Swatch history.
Text to Unicode HTML Entities – Online Convert All Chars
Type text and get every character converted to &#xxxx; entities. Useful for encoding.
Embroidery Thread Converter - Online DMC to Anchor to Madeira
Find equivalent colors across DMC, Anchor, and Madeira embroidery floss brands. Enter a code to see matches. Local reference database.
Scientific Notation Converter - Online Exponential & Decimal Swap
Convert between scientific notation (a Ă— 10^n) and decimal form. Also supports engineering notation. Instant, local.
dBm to Watts Converter - Online RF Power Unit Calculator
Convert between dBm, milliwatts, and watts. Simple calculator for RF engineers and WiFi signal analysis. Instant local calculation.
Bird Age Converter - Online Parakeet & Cockatiel to Human
Convert popular pet bird ages (budgie, cockatiel, macaw) to human years. Lifespan reference included. Fun educational tool.
Hamster Age Converter - Online Tiny Pet Human Years
See how old your hamster is in human-equivalent years. Fun fact: a 3-month-old hamster is already a young adult. Local only.
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).
Horse Hands to cm/in Converter - Online Equine Height Tool
Convert horse height from hands to centimeters/inches and back. Essential for equestrian purposes. Quick and local.
HTML to Plain Text Converter - Online Strip Tags for Clean Copy
Paste HTML and convert to plain text while preserving basic structure (paragraphs, list items). Removes all tags and images. Instant local processing.
YAML to JSON Schema Converter - Online OpenAPI Infer Structure
Paste a YAML example and generate a JSON Schema draft that matches the structure. Helps build API specs. Pure client-side inference.
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.
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.
Eye Prescription Converter - Glasses to Contact Lens Rx Tool
Approximate conversion from eyeglass prescription to contact lens power. Uses vertex distance formula. For educational purposes only, consult your optometrist.
Markdown to PDF Converter - Online Export Clean Documents
Write Markdown and instantly print/save as a styled PDF. Choose from multiple themes. Uses browser print function for high-quality output. Local only.
WebVTT to SRT Converter - Online Subtitle Format Swap
Convert WebVTT subtitle files to SRT and vice versa. Handles formatting conversion and encoding. No upload, pure client-side parsing.
Video to GIF Converter - Online Local Extract Animated Clip
Convert a short video clip to GIF directly in the browser. Trim, resize, and adjust frame rate. No upload required, uses built‑in video decoder. Perfect for memes.
Pregnancy Weeks to Months Converter - Online Trimester Guide
Convert pregnancy weeks into months and trimesters. Simple reference table with baby size comparisons. Informational only.
Kitchen Measurement Converter - Online Cups, Grams, Ounces, Tsp
Convert between common cooking units: cups, tbsp, tsp, ml, grams (for water/flour/sugar), ounces. Quick reference for international recipes.
Pet Age Converter - Online Dog & Cat Years to Human Years
Convert pet age to human years using updated AVMA guidelines (not simple 7:1). Separate calculators for dogs (size-dependent) and cats. Fun & educational.
MySQL ENUM to TypeScript Union - Online Schema Converter
Paste a MySQL ENUM definition and get a TypeScript union type string literal. For type‑safe database schemas.
Quartz Cron to Unix Cron Converter - Online Format Translator
Paste a Quartz cron expression (with seconds field) and translate it to standard Unix cron. For devops migrations.
Pug to HTML Converter - Online Compile Indented Templates
Paste Pug template code and compile it to HTML. See the rendered output instantly. For static site devs.
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.
SVG to React Native Component - Online Converter
Paste an SVG and convert it to a React Native component using react‑native‑svg elements. For mobile apps. Local.
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.
Decimal to IEEE 754 Binary - Online Float Representation
Enter a decimal number and see its 32‑bit and 64‑bit IEEE 754 representation. Learn sign, exponent, mantissa.
Advanced Number Base Converter - Online Bin Oct Dec Hex Custom
Convert numbers between binary, octal, decimal, hex, and any custom base up to 36. With live preview of all bases.
aLtErNaTiNg cAsE Converter - Online Stylized Text
Transform regular text into the mocking SpongeBob‑style alternating case. Copy and paste for hilarious effect.
Sentence Case Converter - Online Capitalize After Period
Convert any text to proper sentence case. Capitalize the first letter after every period, question mark, or exclamation.
Roman Numeral Date Converter - Online MMXXV Style
Convert any date into Roman numerals (day‑month‑year) for tattoos or special occasions. Clean and local.
Number to Words Converter - Online Full English
Type a number and see its full English word representation (e.g., 123 → one hundred twenty‑three). Supports large numbers.
CSV to GeoJSON Converter - Online Map Data Generator
Map CSV columns with latitude/longitude to GeoJSON points. Create map‑ready data instantly. All local.
N‑Triples to JSON‑LD Converter - Online RDF Translation
Paste N‑Triples data and convert it to a compact JSON‑LD representation. Work with linked open data. 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.
Text to Handwriting Converter - Online Realistic Pen Notes
Type notes and convert them into a realistic handwriting image with varied pen styles, ink colors, and paper backgrounds. Perfect for study notes.
Unicode Escape Sequence Decoder - Online Convert \u0041 to A
Paste text with \uXXXX or \xXX escape sequences and decode to readable characters. Works for all Unicode planes.
Audio Format Converter - Online MP3 WAV FLAC OGG
Change audio files between MP3, WAV, FLAC, and OGG. Choose codec and bitrate. Works completely offline in the browser.
SVG to CSS Mask Converter - Online Create Mask‑image
Convert an SVG into a data‑URI for mask‑image or mask‑position. Create non‑destructive clipping masks via CSS.
Image Format Batch Converter - Online to PNG, WebP, JPEG, AVIF
Drop a folder of images and convert all to the same format at once. Choose quality and download as ZIP. Local only.
RGBA to CIELAB Converter - Online Full Color Translation
Convert RGBA colors to CIELAB and other advanced color spaces. For fine‑tuning design tokens. Client‑side math.
Color to Tailwind Class Converter - Online Map Hex to closest
Enter any hex color and find the nearest Tailwind CSS color class. Also shows the Tailwind palette shade.