Image Optimizer

Big images are the number one reason small-business websites load slowly, and slow pages lose visitors and rankings. This free image optimizer is built for one job: making images as small as they can be without looking worse. Choose your photos, set a quality level, optionally cap the width (most web pages never need more than 1600 px), and pick the output format — WebP for the smallest files, JPG for maximum compatibility, PNG when you need transparency preserved. The before and after size of every file is shown side by side with the percentage saved, and — like every tool in this section — the work happens entirely in your browser. Your images are never uploaded anywhere.

Everything happens in your browser — your images are never uploaded to a server.

How to use this tool

  1. Choose one or more JPG, PNG or WebP images.
  2. Set the quality (80% suits most photos) and an optional maximum width.
  3. Pick the output format — WebP is smallest for the web.
  4. Click Optimize images, compare the sizes, then download.

Worked example

A 4.2 MB phone photo at 80% quality, capped at 1600 px wide and saved as WebP, typically lands under 300 KB — the same picture, roughly a fourteenth of the weight, ready for a product page.

Frequently asked questions

How is this different from the Image Converter on this site?

The converter's job is changing format in batches; the optimizer is focused on shrinking: a quality slider tuned for compression, an optional maximum width, and a per-file before/after size comparison with the percentage saved. If your goal is 'make these smaller for my website', you are in the right place.

What quality setting should I use?

80% is the sweet spot for most photographs — the file shrinks dramatically and the difference is invisible at normal viewing sizes. Try 60–70% for thumbnails and background images, and keep 90%+ only for hero images that will be seen full-screen.

Will optimizing strip my photo's location data?

Yes — re-encoding through the browser canvas drops EXIF metadata, including GPS coordinates, camera model and timestamps. For website use that is usually a privacy plus. If you need the metadata, keep your original file untouched as the master copy.

Why did one of my images come out bigger?

Converting a small, already-optimized JPG to PNG can grow it, because PNG is lossless. The results table shows the honest before/after for every file, so you can simply keep whichever version is smaller.

Is there a file size or count limit?

There is no server limit because there is no server — the ceiling is your device's memory. Batches of a few dozen normal photos are fine; hundreds of huge RAW-sized files at once can strain a phone, so work in smaller batches there.

Related tools

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