Where does the document get uploaded?

Nowhere. Opening it and rebuilding it both finish inside your browser — which suits contracts and copies of ID especially well.

I cannot select the text any more.

The way it shrinks a file is by redrawing each page as an image, so the text becomes picture. That is why it warns you in advance when the PDF contains real text. A scan was already an image so nothing is lost, but if the text has to survive, do not use this tool.

The file got bigger instead.

A PDF that was already compressed well can grow when redrawn. In that case it says it grew rather than claiming it shrank. Lowering the quality or resolution will shrink it, at the cost of sharpness.

How do I choose the resolution?

Low for documents that will only be read on screen, high for anything to be printed. Check the first-page preview to see the text is still legible, then decide.

Does the page size change?

No. The original page size is kept, so print sizes such as A4 stay intact.

Compress PDF

Name: PDF 용량 줄이기
Author: KarmoLab

First-page preview · quality·resolution control · resulting size shown · no upload

PDF 용량 줄이기

스캔 PDF 의 용량을 줄입니다. 화질을 미리 보고 고를 수 있고, 파일이 브라우저를 벗어나지 않습니다

PDF 를 끌어다 놓거나 눌러서 고르세요

파일은 브라우저 안에서만 다뤄집니다 — 문서를 올리지 않습니다.

Compress a PDF right in your browser. Preview the quality on the first page before committing; the document never leaves your device.

How to use it

Drop in a PDF
Check the note about whether it is a text document
Pick the quality and resolution
Preview the first page
Compress and download

Common questions

Where does the document get uploaded?: Nowhere. Opening it and rebuilding it both finish inside your browser — which suits contracts and copies of ID especially well.
I cannot select the text any more.: The way it shrinks a file is by redrawing each page as an image, so the text becomes picture. That is why it warns you in advance when the PDF contains real text. A scan was already an image so nothing is lost, but if the text has to survive, do not use this tool.
The file got bigger instead.: A PDF that was already compressed well can grow when redrawn. In that case it says it grew rather than claiming it shrank. Lowering the quality or resolution will shrink it, at the cost of sharpness.
How do I choose the resolution?: Low for documents that will only be read on screen, high for anything to be printed. Check the first-page preview to see the text is still legible, then decide.
Does the page size change?: No. The original page size is kept, so print sizes such as A4 stay intact.

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