ImageResizeKB is a free online tool that helps you resize and compress JPG, PNG and WEBP images to an exact KB size — no design software, no signup, and no watermark.
Many exam boards, job portals, government forms and visa applications ask for a photo under a very specific file size — 20KB, 50KB, 100KB and so on. Guessing a "quality" percentage in Photoshop or Paint often takes several tries. We built ImageResizeKB to remove that guesswork: you tell us the exact KB you need, and we get you as close to it as possible in one step.
When you upload an image, our server analyses it and adjusts compression quality (and, if needed, dimensions) using a smart search algorithm until the output file lands at or just under your target size — while trying to preserve as much visual quality as possible.
We don't require an account, and we don't keep your photos. Uploaded and processed images are automatically deleted from our server within an hour. See our Privacy Policy for details.