Precise
Hit the exact limit your upload portal expects.
Exact local compression
Compress PNG to under 100KB
Reduce a PNG under 100 KB locally. Uses lossless optimization first, then JPEG conversion if needed.
Private
Your file stays in your browser instead of being uploaded to a server.
Fast
Open the tool, hit the target, and download the result in one flow.
First file free. More files today are $3.99. No upload, no guessing.
When this page helps
Use this page when you need Compress PNG to under 100KB for a form, portal, or email attachment. UnderByte lets you aim at the limit directly instead of guessing export settings over and over.
PNG is best when you need transparency or crisp flat graphics. If the portal only cares about file size, converting to JPG will usually hit 100 KB faster.
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Compress a JPG under 50 KB locally with exact target-size compression.