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.
Converters - Format & Unit Conversion
99+ toolsMicrowave Wattage Converter – Online Recipe Time Adjuster
Enter the recipe's wattage and your microwave's wattage to convert cooking time. Prevent burnt or cold food.
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.
Citrus Juice & Zest Converter – Online Lemon/Lime/Orange
Convert between whole fruit, juice volume, and zest quantity. Never wonder how many lemons for 1/4 cup.
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.
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.
Name to NATO Phonetic Call Sign - Online Spell Your Name
Type your name and see it spelled letter-by-letter in the NATO phonetic alphabet. Useful for radio calls or just for fun.
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.
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.
SQL CREATE TABLE to CSV Header - Online Column Lister
Paste a SQL CREATE TABLE statement and extract just the column names as a CSV header row. For data migration.
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.
Base64 to CSS @font‑face Converter - Online Embed Font
Paste a Base64 encoded font string and generate the complete @font‑face CSS rule. Inline small fonts easily.
i18n JSON to CSV Converter - Online Flatten Translation Files
Convert nested JSON translation files into a flat CSV table for translators. Also reverse back. Local only.
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.
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.
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.
Video to GIF Maker - Online Animated Clip Creator
Trim a video clip and convert it into an animated GIF. Adjust frame rate and size. All local. No watermark.
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.
PDF Text Extractor - Online Copy All Text Locally
Drop a PDF and extract the full text content. Processed locally using PDF.js. No upload. Fast and private.
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.
Webpage to PDF Printer - Online Save as Document
Enter a URL and instantly generate a PDF version using the browser's print-to-pdf engine. Private, no upload.
SRT to WebVTT Converter - Online Subtitle Format Changer
Convert .srt subtitles to .vtt format for web video players. Preserves all timestamps and formatting. Local.
Video to MP3 Extractor - Online Save Audio from Video
Extract the audio track from any video and save as MP3 or WAV. No re‑encoding; fast demux. Client‑side only.
Bulk SVG to PNG Converter - Online Batch Export
Convert multiple SVG files to high‑resolution PNGs at once. Set custom dimensions. All local rendering.
PDF to Image Converter - Online JPG/PNG Export Per Page
Convert each page of a PDF into a separate image. Choose format and resolution. Rendered locally with PDF.js.
Image to AVIF Converter - Online Next‑Gen Compression
Encode images to the modern AVIF format with lossless or lossy compression. See the quality/size trade‑off. Local WASM.
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.
SVG to React Component Converter - Online Named Export
Convert an SVG into a named React component with TypeScript. Clean attributes and add props. Dev tool.
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.
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.
RGB to CIELAB Converter - Online Perceptual Color Space
Convert RGB and hex colors to CIELAB L*a*b* values. Understand perceptual lightness and chromaticity. All local math.
Stereo to Mono Audio Converter - Online Merge Channels
Convert a stereo audio file to mono. Also swap or extract left/right channels. Quick podcast preparation. Browser-based.
Online Video Format Converter - MP4, WebM, AVI in Browser
Convert video files between common formats using FFmpeg WASM. No upload required; all processing stays in your browser.
Audio Bit Depth Converter - Online 16‑bit ↔ 24‑bit
Change the bit depth of a WAV file without leaving the browser. Dithering option included. For audio engineers.
INI to JSON Converter - Online Parse Configuration Files
Paste INI content and convert it to a structured JSON object. Handles sections and comments. Client‑side only.
JSON to INI Converter - Online Config File Translator
Convert a flat JSON object into an INI file format with sections and keys. Useful for legacy configs. Local only.
Excel to CSV Converter - Online Extract XLSX Data
Drop an .xlsx file and convert each sheet to CSV. Processed entirely in your browser. No upload needed.
CSV to Excel Converter - Online Save as XLSX
Convert CSV data to a real Excel spreadsheet with multiple sheets and simple formatting. Fully local.
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.
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.
HTML Table to CSV Converter - Online Extract Data
Paste an HTML table snippet and instantly get the data as CSV or JSON. Handy for scraping and data migration. Local.