Blog
Notes on our apps, and building them
PDF to JPG: How to Convert PDF Pages to Images on Android
Export every page of a PDF as its own JPG image, right on your phone - useful for posting a page to social media, or when someone asks for 'just a picture of it.'
Why Won't My PDF Open? Common Causes and Fixes
A PDF that won't open is almost always one of a handful of specific, fixable problems. Here's how to work out which one you're dealing with.
QRcode Is Back: What's New in the Rebuilt App
QRcode was rebuilt from the ground up and relaunched on Google Play. Here's what changed, including a Pro unlock with custom colors, unlimited history, and bulk export.
How to Scan a Document with Your Phone (No Extra Scanner App Needed)
Turn a paper document into a clean PDF using just your phone's camera, with automatic edge detection and perspective correction - no separate scanner app required.
How to Split a PDF and Extract Just the Pages You Need
Pull specific pages out of a PDF into a brand-new file, right on your phone - no need to send the whole document when only a few pages matter.
How to Compress a PDF Without Losing Quality
A PDF that's too big to email doesn't have to look worse to shrink. Here's how PDF compression actually works, and how to control the tradeoff.
How to Merge PDF Files on Android (No Computer Needed)
Combine multiple PDFs into one file right on your phone - no computer, no uploading your documents anywhere. Here's how.
How to Password Protect a PDF on Your Phone
Before you share a PDF with sensitive information, lock it with a password - here's how to do it right from your Android phone.
How to Turn Photos Into a PDF on Android
Combine photos of receipts, forms, or pages into a single PDF, right from your phone's gallery. Here's how, and why the order matters.
Best Free QR Code Scanner Apps in 2026: What to Actually Look For
Most QR scanner apps look the same on the surface. Here's what actually separates a good one, and how to check before you install.
How to Create a QR Code Business Card (vCard)
Make a QR code that saves your contact details directly into someone's phone - no typing, no app required to scan it.
QR Code Menu: How Restaurants Can Make One for Free
Turn your menu into a QR code guests can scan at the table - no app, no subscription, no per-scan fees.
QR Code Not Scanning? Here's How to Fix It
The most common reasons a QR code won't scan, and exactly how to fix each one.
QR Codes vs. Barcodes: What's the Difference?
They both get scanned at checkout, but QR codes and barcodes store data completely differently. Here's what actually separates them.
How to Scan a QR Code Without an App
Most modern phones can scan a QR code with just the built-in camera - no download required. Here's how, on both Android and iPhone.
How to Send a QR Code You've Already Made
Don't regenerate a QR code every time you need to send it - here's how to pull up and share one you already created.
How to Make a QR Code for Your WiFi Password
Stop typing out your WiFi password for every guest. Here's how to generate a QR code that joins your network in one scan.