1) Lossy vs lossless compression
Compression has two main families: Lossy (often JPG) can shrink a lot but may introduce artifacts if pushed too far. Lossless (often PNG) keeps pixels intact but usually achieves smaller savings.
2) The 5-step workflow
3) Where artifacts become visible
4) Quick checklist
5) FAQ
6) Internal link flow
Best results often follow: Resize → Convert → Compress → Metadata cleanup. Useful pages: Resize & Crop, Convert, Remove Metadata.
7) External reference
For performance best practices, web.dev is a reliable resource.
8) How WebP and AVIF fit into compression
Modern formats often deliver the same perceived quality at a smaller size. So this menu is not only about “lowering quality”—it is also about optimizing in the right format. Use WebP compress and the convert menu’s AVIF paths especially for ecommerce galleries and blog covers. Prefer PNG or WebP when you need transparency; photos usually favor JPG/WebP/AVIF.
After a format change, always spot-check edges and color. Over-compressing screenshots with text can create halos; for product photos, zoom skin/tone transitions. If needed, raise quality one step and retry—the smallest possible file is not always the right goal.
9) Practical scenarios for stores and blogs
For store product images: resize to the target width first, then compress, then remove metadata if it is not needed. For blog covers: crop/ratio first, then WebP/AVIF with medium-high quality. For social posts, lock platform ratios in Size & Crop presets, then reduce weight here.
When batching, keep a guide quality setting (for example JPG 88–90 for products) so the storefront looks consistent. Because AllImageLab tools run in the browser, the trial loop is fast—save locally and run a second pass if needed. For longer walkthroughs, see the blog guides on compression and ecommerce imagery.
Mobile users get the same card grid in a single column; light/dark theme follows your site preference. Open a card above when you are ready, or jump to All Tools if your next step is convert or crop instead.