What does 'without quality loss' really mean?
For screen use, "without quality loss" means without any loss you can actually see — and that's achievable on almost every image. The human eye can't perceive much of the data in a photograph, so removing it shrinks the file with no visible change.
There's a difference between mathematically lossless (every pixel preserved, larger files) and visually lossless (looks identical, much smaller files). For creators publishing to screens, visually lossless is the practical goal, and JPEG at 80% delivers it.
Step one: resize to what you actually show
Resize the image to the largest size it's ever displayed at — this removes the single biggest source of wasted file size. A photo shown at 1200px wide gains nothing from being stored at 4000px; those extra pixels are pure weight.
Check the actual display width in your theme or template, and resize to match (or to 2× for sharpness on high-density screens). This one step often halves the file before any compression.
| Step | Action | Typical saving |
|---|---|---|
| 1. Resize | To display dimensions | 30–60% |
| 2. Compress | JPEG at 80% | Further 40–60% |
| 3. Convert | Add WebP copy | Extra 25–35% |
Step two: compress to the sweet spot
Export as JPEG at around 80% quality — the point where size drops sharply but the image still looks perfect. Above 90% you store detail nobody can see; below 60% artifacts start to appear. 80% is the reliable middle.
Use the live before/after readout in the converter to watch the file shrink as you adjust the slider. For most photos you'll find the image looks identical while the size falls by half or more.
Step three: convert to the right format
Convert photographs to JPEG; export a WebP copy too if your platform supports it for an extra 25–35% saving. Format is the final lever after sizing and compressing.
The converter can output both a JPEG and a WebP in one pass and bundle them in a ZIP — giving you a universally compatible file plus a smaller modern one for platforms that accept it.
The repeatable creator workflow
The whole routine is: resize to display size, export JPEG at 80%, optionally add WebP — and batch it for entire shoots. Once it's a habit, optimizing a folder of images takes under a minute.
Drop your whole set into the converter, set dimensions and quality once, and download everything as a ZIP. Consistent, light, sharp images across your whole site — without touching the originals you keep archived.