Can the result end up larger than the original?

Yes. Converting a small, simple PNG to JPG makes it bigger. That is why the size before and after is shown together.

It is the smallest at the same quality. Every current browser supports it, though very old software may not open it.

Do the photos go to a server?

No. They are processed inside your browser only.

Bulk image converter

Name: 이미지 일괄 변환
Author: KarmoLab

Batch convert · size cap · JPG·PNG·WebP · ZIP

이미지 일괄 변환

사진 여러 장의 크기와 형식을 한 번에 바꿔 ZIP 으로 받습니다

사진을 끌어다 놓거나 눌러서 고르세요 (여러 장)

형식

긴 변 최대 1600px

화질 85

사진은 브라우저 안에서만 다뤄집니다.

Convert and resize images in bulk — many photos by the same rule in one go, downloaded together as a ZIP. Before and after sizes are shown side by side.

How to use it

Add several photos
Set the format, maximum size and quality
Convert them all, then download the ZIP

Common questions

Can the result end up larger than the original?: Yes. Converting a small, simple PNG to JPG makes it bigger. That is why the size before and after is shown together.
Should I use WebP?: It is the smallest at the same quality. Every current browser supports it, though very old software may not open it.
Do the photos go to a server?: No. They are processed inside your browser only.

Other tools

Stays on your device What you enter is handled inside your browser only — nothing is stored or sent anywhere.

This tool page states where what you enter goes — see the badge above. All tools · KarmoLab · Who made this · Built with AI. View source