UD5 Toolkit
Babel Config Generator - Online Presets & Plugins
Choose Babel presets (env, React, TypeScript) and plugins. Get a clean babel.config.json to transpile your code. Local tool.
Google Apps Script Web App Boilerplate - Online Starter Code
Google Apps Script Web App Boilerplate
Generate a fully customizable starter code for your next Google Apps Script web application. Choose your libraries, handlers, and get production-ready scripts instantly.
Customize Your Boilerplate
Frequently Asked Questions
A Google Apps Script web app is a lightweight application that runs on Google's infrastructure and is accessible via a unique URL. It is built using Google Apps Script, which is a JavaScript cloud scripting language. These web apps can serve HTML pages, interact with Google services like Sheets, Drive, and Gmail, and are perfect for internal tools or public utilities.
Go to script.google.com, click “New project.” You can also create a project directly from Google Drive by clicking New > More > Google Apps Script. Once created, paste the generated
Code.gs and index.html files into the editor.
Click on "Deploy" > "New deployment" in the script editor. Choose "Web app," set the access permissions (usually "Anyone" for public apps), and click "Deploy." Authorize and copy the generated URL. You can also use "Test deployments" for development previews.
doGet() handles HTTP GET requests, usually used to serve the initial HTML page. doPost() handles POST requests, ideal for form submissions or AJAX data. The boilerplate can include both based on your selection.
Yes, you can include CDN links directly in your
index.html as shown in this boilerplate. However, some organizations restrict external requests; in that case, consider downloading the files and adding them as separate HTML files (e.g., css.html) and include them with <?!= include('css') ?>.
It controls whether your web app can be embedded in an iframe.
ALLOWALL permits embedding anywhere; DEFAULT follows standard security policies. For most public-facing web apps, ALLOWALL is safe if you don't handle sensitive data.
Access parameters inside
doGet(e) using e.parameter or e.parameters. For example, e.parameter.name retrieves the value of ?name=John. You can then use this data to customize the HTML served.
Absolutely. This starter code follows Google's best practices and is modular enough to be extended. Always test your web app thoroughly, consider usage quotas, and implement proper error handling before moving to production.
Random Startup Idea Generator - Online Business Spark
Combine two random concepts to spark the next billion‑dollar startup idea. Silly or serious, it's brainstorming fun.
JavaScript Regex Cheatsheet - Online Interactive Pattern Reference
Interactive cheatsheet for JavaScript regular expressions with live examples. Click any token to see its explanation and test it on sample text immediately.
Random Crypto Key Generator - Online Create API Tokens & Secrets
Generate strong random strings for API tokens, session secrets, or encryption keys. Uses crypto.getRandomValues().
.nvmrc Node Version Generator - Online
Select a Node.js version from the LTS list and instantly download a .nvmrc file. Lock your project’s runtime.
CSS Animation Generator - Online Keyframes & Transitions
Create CSS animations and transitions without coding. Define keyframes, easing, and duration. Copy the @keyframes and animation code instantly.
Blob URL Generator - Online Create Temporary Object URL
Create a Blob from text or a file and generate a temporary URL for it. Understand the Blob API. Dev demo.
Canvas Sprite Animation - Online Play Sprite Sheet
Load a sprite sheet, define frames, and play an animation on a canvas. Control frame rate and loop. Game dev tool.
Selection & Range API Demo - Online Get/Set Selection
Select text and see the Selection object properties. Create ranges programmatically. Understand how rich‑text editors work.
Animated Gradient CSS Generator - Online Moving Background
Create a looping animated gradient background with multiple color stops. Copy the complete CSS keyframes. Eye‑catching.
HTML Symbol Entities Cheatsheet - Online Search & Copy
Search and copy HTML entities for arrows, math, currency, and symbols. See the glyph and code. Fast reference.
Markdown Table Generator - Online Visual Builder & Formatter
Create and format Markdown tables by adjusting rows and columns. Align text, copy the raw Markdown. Perfect for README files.
Emoji Background Pattern Generator - Online Repeat CSS
Select emojis and arrange them into a seamless tiling background. Copy the CSS data‑URI or download as image.
Dynamic SVG Placeholder Generator - Online Text-Based
Generate an SVG placeholder image with custom text, width, height, and colors. Use as a placeholder service. Pure SVG.
CSS Box Reflect Generator - Online WebKit Mirror Effect
Create a reflection effect for images or text using box‑reflect. Adjust direction and offset. Copy the CSS.
Random Number Generator - Online RNG Between Range
Generate truly random numbers within a specified range. Useful for contests, game decisions, and sampling. Runs locally, no hidden algorithms.
Random Git Commit Message Generator - Online Fun
Generate a humorous, realistic‑looking git commit message. Perfect for testing or filling mock repos.
Bayes' Theorem Calculator - Online Probability Update Tool
Easily compute posterior probabilities given prior, likelihood, and marginal likelihood. Visual diagram. All local.
Ingredient Substitution Finder - Online What to Use Instead
Search for common ingredient substitutions (e.g., buttermilk, egg, cornstarch). Quick reference for when you're missing something. Local data.
Dynamic Placeholder Image Service - Online Test Images
Generate dynamic placeholder images by specifying width, height, colors, and text. View instantly as a URL you can embed in mockups. Canvas-based.
Random CV Skill Generator - Online Modern Job Terms
Add some trendy skills to your resume. Generate a list of hard and soft skills relevant for tech and business jobs.
animation‑composition Demo - Online Blend Multiple Animations
See how `animation‑composition: replace, add, accumulate` works by layering animations on the same property. Understand the spec.
HTTP Methods Cheatsheet - Online GET POST PUT DELETE Guide
Quick reference of HTTP methods with their semantics, idempotency, and example REST usage. Static, fast.
Rendering Intent Hint Demo - Online content‑type CSS
Test how `content‑type: text/html` vs `content‑type: image/svg+xml` affects SVG rendering in the browser. Modern performance hint.
Random Magic Item Generator - Online DnD Loot
Create a random magical item with a name, effect, and lore for your RPG session. Perfect for dungeon masters. No API.
SQL CRUD Query Generator - Online SELECT INSERT UPDATE DELETE
Fill in a table name and columns, and the tool writes the correct SQL INSERT, UPDATE, DELETE, and SELECT queries. For quick scaffolding.
Background‑Blend‑Mode Explorer - Online Layer Patterns
Stack multiple background images and blend them with colors. Create unique textures. Copy the CSS code instantly.
Prepositions of Place Practice – Online Drag to Correct
Drag words to the correct position in a sentence using in, on, at. Visual feedback.
Saponification Value Lookup – Online Oils & Butters
Search for the NaOH and KOH sap values of various oils. Reference for cold process soap makers.
CSS Transform Origin Playground - Online Visual Pivot
Click on a box to set the transform‑origin point and see how rotations and scales change. Copy the CSS.