Compress Image Without Losing Quality

100KB is the single most common image size limit on the internet. It appears in upload forms, content guidelines, performance budgets, and platform specifications more often than any other round number, which makes it the default target most people are looking for.

The budget is generous enough for real quality. A photograph at 1200×800 to 1600×1000 pixels typically fits at a quality level where compression is not visible in normal use, and graphics or screenshots can go considerably larger because flat colour costs very little to encode.

Use this page when visual clarity matters and you want to reduce file size without unnecessary quality loss.

Strictly speaking, lossless compression is the only kind that loses nothing, and it cannot hit an arbitrary size target — a lossless encoder gives you whatever size the image's actual information content requires. What people usually mean by this phrase is different and entirely achievable: reduce the file substantially without any change that is visible at normal viewing size.

That is a realistic goal because images contain a great deal of information the eye cannot resolve. Fine variations in areas of similar colour, detail below the resolution of the display, and subtle differences in shadow regions can all be discarded without a perceptible difference. Modern encoders are specifically tuned to spend bytes where the eye is sensitive and save them where it is not.

The practical approach is to start with Best Quality mode and only step down if the target is missed. Reduce dimensions to match how the image will actually be displayed before touching the quality slider — throwing away pixels nobody will see costs no visible quality at all, while lowering quality on an oversized image degrades every part of it.

This page accepts JPG, JPEG, PNG, and WebP inputs, which covers essentially every image you are likely to encounter outside of specialist workflows. Each behaves a little differently under compression, and the tool adapts to what you give it.

Output is always WebP. That choice is deliberate: WebP reaches a given target size at higher visual quality than JPG or PNG can, which means the file you download looks better than the equivalent-sized file in an older format would.

Upload JPG, JPEG, PNG, or WebP images. Downloads are optimized WebP files.

Balanced mode with resize at around 1600px wide is the general-purpose answer. For images that will be displayed small, drop the resize width and you will land far below 100KB with excellent quality — there is no benefit to using the whole budget if you do not need it.

Use Best Quality mode first. If the file is still too large, reduce dimensions gradually instead of jumping to the strongest compression.