Compress to about 100KB
Reduce image size in KB
Lower an image’s file size, measured in kilobytes, without leaving your browser. This page targets about 100KB — a common baseline for web and forms.
Compress images to about 100 KB
Drop images to compress to ~100 KB
or click to browse — JPG, PNG, WebP, AVIF, HEIC
JPG and WebP usually reach the target size most reliably. PNG is lossless and harder to shrink.
The tool lowers quality and, if needed, dimensions until the file fits under 100 KB.
How to reduce image size in kb
- 1
Add your images
Drag and drop one or more JPG, PNG, WebP, AVIF, or HEIC files, or click to browse. Everything stays on your device.
- 2
Set the 100KB target
The target is fixed at about 100KB. Choose an output format — WebP or JPG usually reach the target most reliably.
- 3
Compress automatically
The tool adjusts quality, then dimensions if needed, until each file fits under 100KB. The exact result is shown per file.
- 4
Download the results
Save each compressed file, or download the whole batch at once. No watermark is added.
What you can do
Automatic size targeting
The tool searches for the best quality that still fits your target, then shrinks dimensions only if it must.
Live before/after sizes
Every row shows the original size and the compressed size so you can see exactly what you saved.
WebP and AVIF support
Next-generation formats reach small sizes with better quality than JPG when your browser supports them.
Nothing is uploaded
Compression runs in your browser, which is faster and safer for personal photos.
Frequently asked questions
How do I compress an image to 100KB?
Drop your image above, choose an output format such as WebP or JPG, and the tool automatically lowers the quality — and, if necessary, the dimensions — until the file is at or under 100KB. It shows you the final size for every file.
Will the image quality suffer at 100KB?
It depends on the starting size and the details in the image. Photos with lots of detail need more data, so hitting a small target may soften them slightly. WebP and AVIF usually reach 100KB with less visible loss than JPG. For very small targets, consider reducing the dimensions too.
Are my images uploaded anywhere?
No. Compression is performed entirely in your browser with the Canvas API. Your files stay on your device and are never sent to a server.
What if the image cannot reach 100KB?
For extremely small targets the tool keeps reducing dimensions until it reaches the floor. If a file still cannot meet the target, the row is labelled with the smallest size achieved so you can decide whether that is acceptable.
Which image formats work best for hitting a target size?
WebP and JPG are the easiest to tune because they have a quality setting. PNG is lossless, so the only way to shrink it is to reduce dimensions — the tool handles that automatically but PNG is rarely the best choice for a strict size limit.