Is 500KB small enough for email?

Yes. Most providers allow attachments of 20MB or more, so a 500KB image sends without trouble even in bulk.

Will I see a quality difference?

Rarely. At this target the compression is gentle enough that differences are only visible when zooming in closely.

Compression runs one image at a time. For batches, resize them together first and then compress individually.

500KB is a comfortable target — large enough to keep a photograph looking sharp, small enough for email attachments and most upload forms.

or browse files from your device

JPG, PNG, WEBP, HEIC · min 16×16px · max 10MB

Your images stay private

At 500KB most photographs are visually indistinguishable from the original at normal viewing sizes.

Comfortably under the attachment limits that cause messages to bounce.

Your file is processed in memory and discarded immediately.

Is 500KB small enough for email?: Yes. Most providers allow attachments of 20MB or more, so a 500KB image sends without trouble even in bulk.
Will I see a quality difference?: Rarely. At this target the compression is gentle enough that differences are only visible when zooming in closely.
Can I compress several images at once?: Compression runs one image at a time. For batches, resize them together first and then compress individually.