Hitting a Target File Size: How to Get a Photo Under 100 KB or 200 KB

Many online forms and portals demand photos under a fixed size, such as 100 KB or 200 KB. Meeting it is a matter of balancing dimensions and quality.

Know the units

• 1 KB is roughly a thousand bytes.
• 1 MB is roughly a thousand KB.
• A modern phone photo is often 2 to 6 MB, so it needs to shrink a lot.

Three levers you can pull

Lever	Effect on size
Reduce dimensions	the biggest effect: fewer pixels, smaller file
Lower quality	strong effect for JPEG; overdo it and blockiness appears
Crop	removes unneeded area, so less to store

A step-by-step approach

1. Read the requirements. Note the file size limit, dimensions and file type.
2. Crop first to the shape required, removing empty space.
3. Resize to the required dimensions, or to a sensible size such as 600 to 1000 pixels wide.
4. Compress at a medium quality.
5. Check the file size. If it's still too big, lower the quality a little or reduce dimensions further.
6. Look at the result at 100% zoom to make sure it's still clear.

Rough guides

Target size	Rough approach
Under 200 KB	about 800–1200 px wide, medium quality
Under 100 KB	about 600–800 px wide, medium quality
Under 50 KB	about 400–600 px wide, medium-low quality

These are only starting points. Detail-rich photos need more space than plain ones.

Why some photos won't shrink

Photos with lots of fine detail, sharp textures or noise, such as low-light shots, compress poorly. Simple images with smooth backgrounds compress well.

Tips for identity-style photos

• Use a plain, evenly lit background, which compresses better.
• Keep the face clearly visible, and don't over-compress.
• Check the rules for background colour and framing.

Use a target-size feature

Some tools let you enter a target file size and do the balancing for you. The Image Compress & Resize Tool supports resizing to a target file size as well as exact dimensions, which saves a lot of trial and error.

Keep the original

Always keep an untouched copy, since limits vary between portals.

Try Image Compress & Resize Tool →