Resize Image to 400 KB

The preset acts as a ceiling, so a scan or thumbnail can finish below 400 KB and still count as a successful result. Application systems generally care that a file stays under their limit, not that it consumes every available byte. If the browser cannot reach the ceiling, the page returns its best valid candidate.

JPG and WebP are first tested at the current dimensions while the encoder searches the permitted quality range. When a detailed scan or product image still exceeds 400 KB, the browser scales both sides proportionally and searches quality again, avoiding the distortion that independent width or height changes would cause.

It can be a useful compromise for moderate-size visuals, especially thumbnails, straightforward scans, and newsletter graphics. Dense text, fine patterns, or noisy photographs may need more resolution reduction than simple subjects. Check the final preview and dimensions instead of assuming every source will retain the same clarity.

Binary conversion is used, so 400 KB equals 409,600 bytes. The preset stores the visible number and KB unit, while the shared compression helper converts that pair before processing. This keeps the landing page, Continue Editing workflow, and encoder aligned on one target calculation.

JPG suits many photographs and product shots without transparency, while WebP can be efficient for modern browser delivery. PNG is preferable for sharp graphics or alpha transparency but may require smaller dimensions at this compact ceiling. The correct choice depends on what the receiving form or content system accepts.

Yes if you choose PNG or WebP and the source has transparent pixels. A complex PNG can be difficult to fit into 400 KB because its browser encoding is lossless, so dimension reduction may be stronger than with a photograph. JPEG cannot preserve alpha and should only be used when an opaque background is acceptable.

Image decoding and compression happen locally in the browser rather than on a remote image-processing service. The active job and result may remain in browser storage to support refresh recovery and Continue Editing. This keeps the selected form attachment on the device while the compression work is performed.

ResizeBento limits both its quality search and dimension fallback attempts, so a difficult scan cannot cause endless processing. If the source remains above 400 KB after every permitted candidate is tried, the tool returns the smallest valid result it produced and keeps the target-reached state accurate.