UD5 Toolkit
Web Animations API Sandbox - Online JS Animation Editor
Write JavaScript using element.animate() and see the result in a live preview. Compare with CSS keyframes. Debugger included.
OpenAPI to HTML Preview - Online Swagger UI Generator
OpenAPI to HTML Preview – Online Swagger UI Generator
Paste your OpenAPI (Swagger) spec, upload a file, or load from a URL, and instantly generate a clean, responsive documentation preview. No backend needed – everything runs in your browser.
Instant Preview
Privacy Safe
Copy HTML
Input
Accepts OpenAPI 2.0 / 3.0 in JSON or YAML format.
Preview
No preview yet
Paste, upload, or fetch an OpenAPI spec and click Generate Preview.
Frequently Asked Questions
OpenAPI (formerly Swagger) is a standard format for describing RESTful APIs. It allows you to define endpoints, parameters, authentication, and response structures in a machine-readable JSON or YAML file. Tools like this generator help you visualise and share your API documentation.
Yes! Our tool supports both JSON and YAML. Simply paste the content, upload a .yaml file, or provide a URL that returns YAML. The parser automatically detects the format and converts it internally.
How is privacy handled? Is my spec sent anywhere?
Absolutely no data leaves your browser. All parsing and HTML generation happens locally on your machine. We do not store, transmit, or analyse your OpenAPI files. You can inspect the page's network activity to verify this.
Definitely. Once the preview is generated, you can copy the entire HTML snippet using the “Copy HTML” button and embed it in any webpage, Confluence page, or static site. It’s completely self‑contained.
Due to browser security policies (CORS), many APIs block direct access from other websites. If the URL does not allow cross-origin requests, the fetch will fail. As a workaround, download the file and upload it directly or paste its content.
Telegram Bot Markdown/HTML Builder - Online Message Formatter
Compose messages with bold, italic, links, and code. See the raw HTML or Markdown for your Telegram bot API calls.
HTML Table Generator - Online Visual Spreadsheet to Code
Create HTML tables visually by adjusting rows and columns. Add data, style, and copy the generated markup. Perfect for quick table prototyping.
Structured Data Generator - Online JSON-LD Article & Product
Create JSON-LD structured data snippets for articles, products, and events. Fill in fields and copy the code. SEO helper.
Text to ASCII Art Banner - Online Figlet & Font Generator
Convert plain text into stylish ASCII art banners using various font styles. Copy and paste to social media or comments. Fun retro tool.
ASCII Art Banner Generator - Online FIGlet Style Text Maker
Type text and render as ASCII art banner using FIGlet fonts. Copy to plain text or code comments. Multiple styles available. Nostalgic fun.
JSON to XML Converter - Online Data Interchange Tool
Seamlessly convert JSON objects into valid XML documents. Control root element naming and attribute formatting. Entirely local, keeping your data safe.
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.
ASCII Text Signature Generator - Online Figlet & Banner
Type your name and create a stylized ASCII text banner for email signatures or forum posts. Choose a font style.
HTML to React JSX Converter - Online Quick Migration
Paste standard HTML and get a valid React JSX component. Converts class to className, inline styles, etc. Local transformation.
ICS to JSON Converter - Online Calendar Data Export
Parse an iCalendar file and output the events as a clean JSON array. For developers integrating calendar data. Client‑side only.
Astro Component Generator - Online .astro Boilerplate
Generate an Astro component with frontmatter, template, and optional client‑side island directive. For content sites.
Calorie-Based Meal Planner - Online Weekly Menu Generator
Set daily calorie targets and generate a simple 7-day meal plan with breakdown. Customizable food items. Local only, no ads.
Text to Sound Wave GIF - Online Typed Audio Art
Type any word and generate a fake audio waveform GIF that looks like the word was spoken. Creative social posts. Canvas.
Work Anniversary Message Generator - Online Congratulator
Get a thoughtful message to celebrate a colleague's work anniversary. Choose tone (formal, friendly, funny).
3D Electron Orbital Viewer - Online Chemistry Visual
Rotate and view the 3D shapes of s, p, d, and f orbitals. Great for teaching quantum mechanics. WebGL‑based.
Paper Box Template – Online Generate Printable Gift Box
Custom dimensions for a square paper box with lid. Generate SVG/PDF for cutting. Perfect for small gifts.
Horror Movie Title Generator – Online Spooky Name Creator
Create random spooky film titles with adjectives, nouns, and years. Perfect for Halloween or writing prompts.
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.
Random International Recipe - Online Cuisine Explorer
Pick a country and get a random traditional recipe from that cuisine. Learn cooking worldwide. Local database.
Atom Builder 2D - Online Create Elements with Protons/Electrons
Drag protons, neutrons, and electrons onto a Bohr model template. See the element change. Educational tool.
Constellation Finder – Online Interactive Planisphere by Month
Select month and hour to see a simple star map with major constellations labeled. Educational astronomy fun.
Cocktail Builder - Online What Can I Make?
Select the ingredients you have at home and see a list of cocktails you can make. Surprise yourself. Local database.
GIF to Sprite Sheet - Online Convert Animation to Grid
Convert an animated GIF into a horizontal or grid sprite sheet. Download as PNG and get CSS example. Game dev helper.
Text to Sci‑Fi Sound Effect - Online Sonification
Type any word and hear a unique synthetic sci‑fi sound effect generated from its letters. Fun audio experiment.
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.
Recipe Scaler - Online Multiply Ingredients for Any Servings
Paste a recipe ingredient list and double, triple, or scale to any serving size. Rounds fractions intelligently. Save your scaled recipes locally.
Clickbait Title Generator - Online You Won't Believe...
Create exaggerated clickbait headlines. Perfect for satire. 'Number 7 Will Shock You.' All just for laughs.
Pregnancy Weeks to Months Converter - Online Trimester Guide
Convert pregnancy weeks into months and trimesters. Simple reference table with baby size comparisons. Informational only.
Emotion Moodboard Creator - Online Feelings Board
Drag emotion word cards onto a canvas to visualize your day. Mix and match. Screenshot to share. Therapeutic.