Frequently Asked Questions
Everything you need to know about LittleDevBox. Can't find what you're looking for? Send us a message.
01 Are my files uploaded to any server?
No. All processing happens entirely in your browser using JavaScript. Your files never leave your device. This is a fully client-side application — there are no upload endpoints, no server-side processing, and no database storage.
02 Do I need to create an account or sign up?
Not at all. Every tool is free and requires no account, no email, no login. Just open the tool and start using it.
03 Is there a file size limit?
There is no hard limit imposed by the app, but your browser may have memory constraints. Very large files (e.g., 100MB+ PDFs or images) may cause performance issues since everything runs locally in your browser's memory.
04 Which browsers are supported?
All modern browsers: Chrome, Firefox, Safari, and Edge (latest versions). Internet Explorer is not supported. For the best experience, keep your browser updated.
05 Is my data private?
Absolutely. Zero data is collected, logged, or transmitted. There are no analytics scripts, no tracking cookies, and no third-party services that process your content. Every tool runs 100% client-side.
06 Can I use these tools offline?
You need an internet connection to load the page for the first time. After that, most tools can work offline because the code runs entirely in your browser with no server communication.
07 How does the PDF Merger work?
The PDF Merger uses PDF.js (Mozilla's PDF rendering library) to read your PDF files in the browser. It combines pages from multiple documents into a single PDF using client-side JavaScript. No files are uploaded.
08 How does the Image Compressor work?
The Image Compressor draws your image onto an HTML Canvas element and exports it with adjustable quality settings. This allows you to reduce file size without losing more quality than you choose.
09 How does the QR Generator work?
The QR Generator uses a JavaScript QR code library to encode your text or URL into a QR matrix. The code is rendered onto a Canvas element, which you can then download as a PNG image.
10 How do I report a bug or suggest a feature?
Click the bug button (🐛) at the bottom-right corner of any tool page. This opens a form where you can describe the issue or suggestion. Your email client will open with a pre-filled report — just send it to us.
11 Will more tools be added?
Yes. New tools are added regularly. Check the Tools page or follow updates. If you have a specific tool in mind, use the feedback button to suggest it.
12 Can I bookmark or share a specific tool?
Yes. Every tool has its own URL (e.g., /tools/pdf-merger). You can bookmark it or share the link directly. No account needed — the recipient just opens the link and starts using it.