QuokkaPix
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Compress an image toward a 300 KB target

A 300 KB target is usually a submission limit, not a quality target. Start by making the pixel dimensions reasonable, then tune format and quality so the result stays readable.

300 KB targetLocal compressionResize first
Open live editor Compress image
The button below opens the QuokkaPix editor with this tool already selected.

Good fits

1
Prepare an upload for a form with a small file limit.
2
Create a lighter product or profile image.
3
Make a sharing copy while keeping the original unchanged.

Workflow

1
Upload the image.
2
Resize if the source is larger than the destination needs.
3
Set the target near 300 KB and choose the accepted format.
4
Export and check detail, text and edges.

Limits to check

1
Exact byte size can vary by browser encoder.
2
Highly detailed images may not look good at 300 KB.
3
Transparent images may need WebP or PNG instead of JPG.

FAQ

Is 300 KB guaranteed exactly?

No. QuokkaPix works toward the target and the final size depends on format, dimensions and browser encoder.

Should I resize first?

Yes. Oversized images often compress better after dimensions are reduced.

Practical QA notes

Quality checks for a 300 KB export

1
Check small text and product edges.
2
Avoid lowering quality before reducing unnecessary pixels.
3
Keep the original file for a higher quality export if the destination allows it.

How to review a 300 KB target without ruining the file

A 300 KB limit is useful for forms, listings and lightweight previews, but it is not a universal quality setting. Start with dimensions that match the final use, then adjust quality and format. If the image contains text, product texture or a face, compare the export at the real display size before accepting a smaller file. When the target cannot be reached cleanly, reducing dimensions usually does less damage than forcing extreme quality loss.

1
Use WebP for web delivery when the destination supports it.
2
Use JPG for compatibility when upload forms reject WebP.
3
Keep a larger source copy so the 300 KB file is only the delivery version.

Use 300 KB only when the destination really needs it

A 300 KB target is strict enough to damage detailed photos if the dimensions stay too large. Start by matching the real display size, then reduce quality only as much as needed. Product photos, IDs and screenshots should be checked at the final viewing size because text and edges can collapse before the file reaches the target. If the destination accepts 500 KB or WebP, that can preserve more useful detail.

1
Resize before lowering quality.
2
Check text, skin, fabric and product edges.
3
Keep a larger copy when the upload form allows it.