How do I compress an image to under 100 KB?

Upload your JPG, PNG, or WebP image, set the target size to 100 KB (the default for this page), and click Apply. The binary-search algorithm automatically finds the highest quality setting that keeps the file under 100 KB.

What if my image cannot reach 100 KB even at the lowest quality?

If the file is still over 100 KB at quality 5%, the tool returns the smallest achievable size and warns you. For very large images, switch the output format to JPG (PNG is lossless and cannot be quality-compressed), or downscale the image dimensions first.

What happens if my image is already smaller than 100 KB?

The tool detects this and skips re-encoding entirely, returning the original file with a 'no compression needed' notice. This avoids quality loss from unnecessary re-encoding.

Why do online forms ask for images under 100 KB?

Government portals, job application sites, scholarship forms, and exam registration systems commonly enforce a 100 KB upload limit to keep their storage and bandwidth costs predictable. Compressing to exactly under 100 KB maximizes quality while satisfying the constraint.

Will my image look bad after compression to 100 KB?

For typical ID-style photos and document scans at 600x800 or smaller, 100 KB retains good visual quality. For larger photos with fine detail, you may see minor artifacts; switching to WebP output often helps, as WebP compresses more efficiently than JPG at the same quality.

Compress Image to Custom Size — Free Online KB / MB Image Compressor

Set any target size in KB — 30 KB, 250 KB, 2 MB, whatever your form requires. Free, private, 100% browser-based.

Select an image or drop it here

JPG · PNG · WebP · GIF · HEIC · max 200 MB · one image at a time

How To Compress an Image

Step 1

Upload the images you want to compress. Supports various image formats, up to 60 images at once.

Step 2

Drag the slider to select compression quality, choose the output format, and click the "Apply" button.

Step 3

Click the "Download Compressed Image" button to save the compressed image.

Compress Image to Custom Size

How To Compress an Image

Step 1

Step 2

Step 3

Compress Image

Original Image

Compressed Image

Add Watermark

Image Split & Merge

Document to Image

Original File

Converted

Image to Document

Compress Image to Custom Size

How To Compress an Image

Step 1

Step 2

Step 3

Compress Image

Original Image

Compressed Image

Add Watermark

Image Split & Merge

Document to Image

Original File

Converted

Image to Document

Set Crop Dimensions