Building a Next.js Invoice Generator with PDF Export
November 28, 2025
JavaScript Tools and Code Examples
Free JavaScript generator tools for real developer workflows
Create QR codes, UUIDs, random strings, random numbers, and invoices online, then copy ready-to-use JavaScript, React, and Node.js snippets into your own project.
5
Core tools
JS
Browser, React, Node
Free
No paywall for core usage
Guides
Tools paired with examples
Featured JavaScript generators
Start with the tools that already have the strongest search demand and the clearest implementation value.
QR Code Generator
Generate QR codes for URLs, WiFi, plain text, and contact cards with JavaScript-friendly examples.
Open toolRandom String Generator
Create secure random strings for passwords, API keys, session tokens, and test fixtures.
Open toolRandom Number Generator
Generate integers, decimals, and unique number sets with instant results and code examples.
Open toolJavaScript UUID Generator
Generate UUID v4 and v7 values in the browser and copy Browser or Node.js snippets.
Open toolInvoice Generator
Build printable invoices online and export PDF output with a Next.js-friendly workflow.
Open toolHow to use the site
The site works best when the tool page solves the task and the related guide explains the implementation.
Generate values online
Use the browser tools directly when you need a quick QR code, UUID, random string, or invoice draft.
Copy production-ready snippets
Each tool pairs the UI with JavaScript, React, or Node.js examples so you can move from prototype to code fast.
Learn the implementation
Use the blog and guide pages to understand the APIs, edge cases, and security tradeoffs behind each generator.
Latest guides from the blog
Learn how the generators work under the hood and when to use browser or Node.js APIs.
How to Build a JavaScript QR Code Generator (with Code Examples)
November 24, 2025
Secure Random String Generation in JavaScript (Beyond Math.random)
November 16, 2025
Frequently asked questions
What can I generate on jsgenerator.com?
You can generate QR codes, UUIDs, random strings, random numbers, and invoices, then copy related JavaScript, React, or Node.js snippets.
Are the tools free to use?
Yes. The core tools are free to use in the browser, and the surrounding guides are publicly accessible.
Do I need to install a package first?
No. You can use the tools online first, then copy the code examples into your own app when you are ready.
Is there documentation for the generated code?
Yes. The tool pages focus on output, while the blog and guide pages explain implementation details, security notes, and framework-specific usage.
Need a tool now or an implementation guide first?
Start with the tool if you want instant output. Open the related guide if you want to understand the JavaScript behind it.