Compress Image to Under 400KB — Free Online
Quick Answer
Compress images to under 400KB for online uploads and email. FileCurve adjusts quality until your file hits the target size.
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Frequently Asked Questions
How to compress image to 400KB?
Upload to FileCurve, set quality to 75-85%, and download when output is below 400KB.
Is 400KB too large for a web image?
400KB is acceptable for large hero images. For thumbnails and body images, aim for under 100-200KB for best web performance.
Last updated: April 2026