The Image KB Resizer
Resize one or multiple photos to an exact file size in KB — instantly, privately, and entirely in your browser.
Start resizing now ↓Single or Batch
Upload one image or drag & drop multiple files. The tool adapts automatically.
Web Worker Powered
Non‑blocking processing keeps the UI smooth even with large batches.
100% Private
All processing happens locally. No upload, no server.
ZIP Download
Download all resized images as a single ZIP file.
Byte‑Perfect
Each image is padded with invisible metadata to hit the target size exactly.
What is an Image KB Resizer?
An Image KB Resizer lets you change the file size of an image to a specific number of kilobytes (KB). Unlike simple compressors, our tool can also increase the file size when needed by adding imperceptible metadata padding. With Web Workers, all processing runs off the main thread, so the page never freezes.
How to resize images to an exact KB size
Upload images
Drag & drop one or multiple JPG, PNG, or WebP files.
Set target size
Enter the desired KB and choose output format.
Download results
Download individually or as ZIP.
Resize images to
exact KB size
Upload one or more images — we'll resize them all to your target KB.