QUALITY & FILE SIZE GUIDE
There is no single quality number that is best for every image. This practical workflow uses Zeepora’s measured result size and side-by-side preview to help you choose settings for the image and destination you actually have.
For AVIF, JPG, WEBP and PDF outputs, Zeepora starts at 92%. Lower values can reduce the file size, but the visible effect depends on the image, output format and dimensions. Treat 92% as a starting point, not a promise or universal recommendation.
Width and height control the number of output pixels. If an image will only appear at a smaller size, reducing dimensions can remove more bytes than aggressive quality reduction while keeping the displayed result clear.
Fit within preserves the aspect ratio, stays inside the requested width and height, and does not enlarge a smaller source. Crop to fill fills both dimensions by trimming edges. Stretch forces both values and can distort the image.
After conversion, Zeepora shows original and result formats, file sizes, dimensions and percentage change. “Compare images” adds fit-to-frame and actual-size views so you can inspect both the whole image and fine detail.
A smaller percentage is useful only when the result still looks acceptable and works at the destination. A conversion can also produce a larger file; Zeepora marks that outcome and suggests trying lower quality or dimensions. File size varies with pixel dimensions, detail, noise, transparency, source encoding and output format, so two images using the same setting can produce very different results.
Do not judge sharpness from the fit-to-frame preview alone because scaling can hide artifacts. Use actual-size view for detail, then return to fit view to judge the complete image. Keep the original file as the master because converting an already compressed result again cannot restore discarded detail.
Compare JPG to WEBP, JPG to AVIF or PNG to WEBP. Check skin, hair, foliage and smooth skies at actual size; these areas often reveal compression differences sooner than a simple icon.
Small text and hard edges may matter more than a dramatic size reduction. Test PNG to WEBP and inspect text at actual size. If the result is not clearly useful, retaining PNG can be the better decision.
Confirm the destination supports the chosen format, then inspect transparent edges on the checkerboard preview. Try PNG to AVIF or SVG to PNG according to whether you need a compact web image or a fixed-size raster copy.
| Run | Change | Record | Inspect |
|---|---|---|---|
| Baseline | Required format, 92% quality | Dimensions, bytes, percentage change | Fit view and actual size |
| Test A | Lower quality only | New size versus baseline | Fine detail and gradients |
| Test B | Smaller dimensions only | New size versus baseline | Clarity at delivery size |
The winning run is not automatically the smallest. It is the one that satisfies the destination, preserves the detail you care about and avoids unnecessary bytes.
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