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Reduce Image Size in KB

Reduce an image to the size in KB that your form asks for.

or drop an image anywhere on this page

JPEG, PNG or WebP · up to 50 MB

  • Files never leave your device
  • Free, no sign-up
  • No watermark

How to use this tool

  1. Choose a JPEG, PNG or WebP file, or drag it onto the drop area.
  2. Check the target size (currently 100 KB). It is editable, so change the number or the KB/MB unit if your limit differs.
  3. Press the button. The tool lowers the quality first, then reduces the dimensions step by step if the file is still too large.
  4. Compare the preview and the measured output size with the original, and read any notes or warnings.
  5. Download the new file. If it missed the target, adjust the target slightly or crop the original, and try again.

What to know before you reduce Image Size in KB

Kilobytes are the unit most upload forms use, and the limit is usually a hard ceiling: a file of 101 KB is rejected when the form says 100 KB. This page starts at 100 KB, but the number is yours to change, so it works for 20, 50, 150, 200 KB or anything else. The tool lowers JPEG quality first, because that shrinks the file with the least visible damage, and only reduces the pixel dimensions when quality alone cannot reach the target. The size it reports is measured from the actual saved file, not estimated. A simple picture such as a signature or a document scan reaches a small limit easily, while a detailed photograph needs a higher limit to stay clear. If the form does not state a limit, aim for the largest size that is still allowed rather than the smallest, since extra compression only costs quality.

This page is for any KB limit, not one fixed number: type the size your form or website asks for and the tool works toward it. The size you enter is a goal, not a promise: the result depends on the original image, its dimensions, its complexity, its format and your browser's encoder, and the tool reports the real size instead of assuming it.

Recommended settings and supported formats

Choose JPEG output for photographs. Type the limit into the size box exactly as the form states it. If the result is slightly under the limit, that is expected, because the tool stops at the best quality that fits instead of squeezing further.

Accepted input: JPEG, PNG and WebP (WebP depends on your browser). HEIC and AVIF are not supported. PNG is lossless, so it can only get smaller with fewer pixels unless you choose JPEG or WebP output.

Practical uses

  • Uploading a photo or document to a form that sets a maximum in KB
  • Making an attachment small enough for a portal with a strict size cap
  • Shrinking images for a web page that should load quickly

Tips for a smaller file

  • Check whether the form counts 1 KB as 1,024 or 1,000 bytes, and leave a little room.
  • Crop the picture first; fewer pixels means less to compress.
  • Use JPEG for photos and keep PNG only for flat graphics.
  • If it will not fit, raise the target a little instead of accepting a blurry result.

Frequently asked questions

How do I reduce an image to a specific KB size?

Enter the KB limit, choose the image and start. The tool lowers quality, then dimensions if needed, and shows the real size it reached.

Why is my file a bit smaller than the number I typed?

The tool keeps the best quality that stays under your limit, so the result is at or just below the target.

Is my image uploaded?

No. The compression runs in your browser and the file stays on your device.

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Privacy

Your image is processed entirely in your browser using your own device. It is not uploaded to Paul Digital or any other server, and nothing is stored once you close the page.