Reduce Image Size in KB – Compress Photo to 20KB, 50KB, 100KB

Compress a photo to an exact size in KB – 20 KB, 50 KB, 100 KB or any size.

Choose images

JPG, PNG, WebP — we make each one 50 KB or smaller

Reduce Image Size in KB compresses your photo or signature to the exact file size an online form asks for — 20 KB, 50 KB, 100 KB or any number you type. It keeps the best possible quality and can also set an exact size in pixels.

How to reduce image size in KB

  1. Click "Choose images" or drag and drop your photo or signature into the box.
  2. Type the target size in KB, or pick 20, 50, 100, 200 or 500 KB.
  3. If the form asks for exact pixels, type the width and height.
  4. Click "Compress" and download your image.

Why use ZentaPDF Reduce Image Size in KB?

Easy to useSimple steps, clear buttons — done in a few clicks.
Free, no sign-upNo account, no email, no watermark and no daily limits.
FastNo waiting — results are ready in seconds.
Works everywhereUse it on Windows, Mac, Linux, Android or iPhone in any modern browser.
Keeps qualitySmart settings keep your images sharp.
Large filesHandle big files and many pages — limited only by your device’s memory.

Frequently asked questions

Will the photo still look good?

Yes, in most cases. The tool keeps the highest quality that fits your target and only makes the picture smaller in pixels if it really has to.

What if the form asks for an exact size in pixels?

Type the width and height (for example 200 × 230 px for a passport-style photo). The photo is cropped from the centre to that exact size and then compressed to the target KB. Always check the size rules in the official notification of the form you are filling.

Why is the output a JPG?

JPG gives the smallest files for photos and signatures and is accepted by almost every online application form. If your form needs PNG, use our PNG converter afterwards.

Can I compress many photos at once?

Yes. Add several images and each one is compressed to the same target size. Download them one by one or as a ZIP.

Is it really free? Do you add a watermark?

Yes, it is completely free with no sign-up, no watermark and no daily limits. The site is supported by a few non-intrusive ads.

Guides

Related tools

Compress Image to 20KBMake any photo 20 KB or smaller in one click.Compress Image to 50KBMake any photo 50 KB or smaller in one click.Compress Image to 100KBMake any photo 100 KB or smaller in one click.Resize ImageChange the width and height of JPG, PNG and WebP images in pixels or percent.

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