How to Reduce an Image to 1 MB, 500 KB or 100 KB for an Upload Form
Job portals, visa applications and exam registrations often reject photos over 1 MB, 500 KB, 200 KB or even 100 KB, while a phone photo is usually several megabytes. Getting under the limit is easy once you know the two things that make an image large: its pixel dimensions and how it is compressed. This guide shows how to hit an exact limit without making the photo look bad.
Set a target size
Open Compress Image, add the photo, and type the limit in Aim for a file size, for example 200 kB. The tool works towards that size. Leave a little room (aim for 180 kB if the limit is 200 kB), since some portals count a kilobyte as 1,000 bytes and others as 1,024.
Reduce the width first
A modern phone photo is often 4,000 pixels wide or more, far more than any form needs. Capping the width at 1920 or 1280 pixels saves more space than compression alone and keeps the picture sharp. Compress Image offers these widths directly; Resize Image lets you type exact dimensions.
Passport and ID photo forms often state exact pixel sizes, such as 600 × 600. Use Crop Image for the shape and Resize Image for the size, then compress.
Choose the right format
JPG is the safe choice for photos and is accepted almost everywhere. PNG suits screenshots and logos but makes photos very large; saving a photo PNG as JPG often cuts its size dramatically. If a site rejects your iPhone HEIC photo, convert it to JPG first with Image Converter or HEIC to JPG.
Check the result
Look at the compressed photo at full size before uploading, especially faces and text. If it looks blocky, ease off the target or use Recommended instead of Smallest. If the tool gives you the original back, the image was already as small as it could get without looking worse: reduce its width instead.