tooloora

Compress Image to 100 KB — web-ready photos

Bring a photo down to at most 100 KB with the best possible quality — locally in your browser, no upload.

Runs locally — nothing is uploaded

Drop images here or click

JPG, PNG or WebP · multiple files supported · stays local

Runs locally in your browser – no upload.

Get an image down to 100 KB — web-ready in seconds

The 100 KB target is preset: the tool automatically finds the highest quality that stays below it and shows you the before/after size. Everything runs locally in your browser — no upload, no queue, works offline.

Why is 100 KB a good target for the web?

Because images are the single largest chunk of page weight and feed straight into Google's loading metrics: the Core Web Vitals rate a Largest Contentful Paint of up to 2.5 seconds as good — and the LCP element is very often the page's biggest image. A 100 KB image instead of a 1 MB photo shortens exactly that metric, especially on mobile networks. Your CMS media library and newsletter tool will thank you too.

How do I get the best quality out of 100 KB?

Two levers work together: pixel dimensions and format. First resize the image to the size it is actually displayed at (1200 px wide is often enough for content images) — the KB budget then spreads over fewer pixels and quality visibly rises. And pick WebP where possible: per Google's study it is 25–34% smaller than JPEG at equal quality.

Honest limits

A full-resolution 12-megapixel photo does not fit into a good-looking 100 KB — the tool reports unreachable targets honestly and offers the smallest achieved size instead of silently overshooting. Losslessly optimised PNG screenshots often stay above 100 KB; as JPG/WebP they make it. EXIF metadata is dropped during re-encoding.

Frequently asked questions

Is my image uploaded to reach 100 KB?

No. Compression runs entirely in your browser; your image never touches a server. It even works offline.

Why aim for 100 KB on the web?

Image weight is the most common reason pages feel slow. Google's Core Web Vitals rate a Largest Contentful Paint of up to 2.5 seconds as good — and the LCP element is very often a hero image, so a 100 KB image instead of a 1 MB one directly moves that metric.

What if 100 KB is not achievable?

The tool says so honestly and offers the smallest size it reached. Reducing the pixel dimensions first (say to 1200 px wide) usually makes 100 KB easy.

JPEG or WebP for 100 KB?

WebP reaches the target at visibly higher quality: per Google's study it is 25-34% smaller than JPEG at equal quality. Choose JPEG only when the recipient demands it.