Image Conversion Blog

Things I've found while building and maintaining this converter — format comparisons with real test numbers, performance fixes, and the occasional thing that surprised me.

How to Convert JPG to PNG — And When You Actually Should

The file gets bigger, not smaller. There are really only two situations where JPG to PNG makes sense — and a lot of cases where it quietly makes things worse.

WebP vs PNG: The Honest Comparison

Everyone says WebP is smaller. Usually true — but I ran tests on 60 real images and PNG won on most of the screenshots. Context matters more than the generic advice.

JPG, PNG, WebP, AVIF, SVG — Which One Should You Actually Use?

The standard advice is correct but too simplified to be useful. Here's a more honest version, including the cases where the usual rules are wrong.

WebP: What It Is, Why It Works, and Where It Falls Short

I recommend WebP more than any other format — but not because of marketing. Here's how predictive coding actually works, real numbers from my tests, and three situations where I'd pick something else.

AVIF vs WebP: What I Found After a Year of Running This Converter

AVIF compression is genuinely impressive on the right images. I also tried to build AVIF support into this site, and it didn't go smoothly. Here's both: the format comparison, and an honest update.

Images and LCP: How I Fixed a 5-Second Load Time

My own site had an LCP of 5.2 seconds because of one PNG I hadn't thought about. Converting it to WebP took LCP to 1.8 seconds on mobile. Here's what changed and what actually matters.

Why Do Images Load So Slowly? (And What I Learned Building This Converter)

Your images load fast on your machine because you already downloaded them. Here's what actually determines image load time for real users — and what I changed after figuring this out.