How to Resize an Image to a Required KB Limit

Resize the image

1. A KB requirement is a maximum file size, while width and height are pixel dimensions. Some forms require one or both constraints.
2. Then reduce JPEG quality only as much as needed to fit the KB limit.
3. The result is at or below the target, not guaranteed to contain an exact byte count.

Read the upload requirements carefully

Check the accepted format, maximum KB size, width, height, aspect ratio, and whether the image must remain suitable for identity or document review.

1. Write down the required KB limit.
2. Record any required dimensions.
3. Keep the original image unchanged.

Resize dimensions before lowering quality

A camera image may contain far more pixels than an online form needs. Reducing dimensions can save substantial space before stronger JPEG compression is necessary.

1. Enter the target dimensions or choose the size mode.
2. Open Image Resizer.
3. Set the maximum KB value and generate a preview.

Inspect the final JPEG

Zoom into faces, document text, edges, and fine details. Very low targets can introduce blur or compression blocks, and PNG transparency is flattened in the JPEG result.

1. Confirm its file size and dimensions.
2. Repeat with a larger target if essential detail is unclear.
3. Download the resized JPEG.