VoidForge Blog
Guides, tutorials and tips for working with files, code and the web.
Featured articles
Best Free Image Compressors for the Web
Large images are the #1 cause of slow websites. Here's how to compress PNG, JPG and WEBP images losslessly — and when to use lossy instead.
How to Merge PDF Files Online (Free & Private)
Step-by-step guide to combining multiple PDFs into one document, entirely in your browser. No uploads, no watermarks, no signup.
10 Best Free PDF Tools You Should Bookmark in 2025
PDFs power contracts, invoices, resumes and research. These ten free, browser-based PDF tools handle everyday work without signups, installs or uploads to a stranger's server.
All articles
(8 posts)How QR Codes Work (and How to Generate Them)
QR codes are everywhere — payments, menus, boarding passes. Here's how they encode data, why they survive damage, and how to make your own.
The Ultimate Guide to Image Formats (PNG, JPG, WEBP, SVG)
Every image format explained — when to use each, how they compress, transparency, animation, browser support, and the modern defaults you should ship.
15 Essential Online Developer Tools for 2025
Formatters, decoders, generators and testers — the 15 browser-based developer tools you'll reach for every week, all free.
What Is Base64 Encoding? A Developer's Guide
Base64 turns binary data into ASCII text so it can travel through email, JSON, URLs and HTML. Here's how it works, when to use it — and when not to.
PNG vs JPG: Which Image Format Should You Use?
PNG for logos, JPG for photos — mostly. Here's the full breakdown of when each format wins, where WEBP fits, and how to convert between them.
Best Free Image Compressors for the Web
Large images are the #1 cause of slow websites. Here's how to compress PNG, JPG and WEBP images losslessly — and when to use lossy instead.
How to Merge PDF Files Online (Free & Private)
Step-by-step guide to combining multiple PDFs into one document, entirely in your browser. No uploads, no watermarks, no signup.
10 Best Free PDF Tools You Should Bookmark in 2025
PDFs power contracts, invoices, resumes and research. These ten free, browser-based PDF tools handle everyday work without signups, installs or uploads to a stranger's server.