How to Compress an Image With No Quality Loss at All
True lossless compression shrinks PNGs by 20-50% without altering one pixel. Here is when it works, when it does not, and what visually lossless means.
7 min read
Image Compression, Formats and Conversion
Most images on the web are several times larger than they need to be, usually because they are saved in the wrong format or at print resolution. These guides explain what JPG, PNG, WebP and AVIF are each good at, how much you can compress before anyone notices, and how to do it without uploading your photos to a stranger's server.
Images guides(4)
How to Convert HEIC Photos to JPG on Windows
Windows cannot open iPhone HEIC photos without a paid codec. Convert them in your browser, in bulk with Photos, or stop the iPhone making them at all.
7 min read
How to Reduce an Image's File Size for an Upload Limit
Hitting a 2MB or 5MB cap? Work backwards from the limit — resize to the required dimensions first, then set quality to land under the number.
7 min read
How to Compress Images Without Losing Quality
Choose the right format first, resize before you compress, and stay in the 75-85% quality band. That combination shrinks files without visible loss.
8 min read
Topics in Images
Images questions
Which is better, JPG or PNG?
Neither — they solve different problems. JPG is for photographs, where its lossy compression is invisible and the savings are large. PNG is for screenshots, logos and anything with sharp edges or transparency, where JPG introduces visible artefacts.
Should I use WebP instead of JPG?
For the web, usually yes — WebP is typically 25-35% smaller at equivalent quality and every current browser supports it. Keep JPG for files you email or hand to someone using older software.
What quality setting should I use for JPG?
75-85% is the practical sweet spot. Above 90% the file grows quickly with no visible benefit; below about 70% you start seeing blocking artefacts in smooth gradients like skies.