How do I compress a PDF?

Click Select PDF file, choose a compression level, then click Compress PDF. When it finishes, download the smaller file.

Is my PDF uploaded to a server?

No. The compression runs entirely in your browser, so your document is never uploaded and nobody else can see it.

What is the difference between Light, Balanced and Strong?

Light and Balanced shrink the pictures inside the PDF and keep your text sharp and selectable. Strong turns every page into a picture, which gives the smallest file but removes selectable text.

Will compression reduce the quality?

Light keeps quality very close to the original. Balanced lowers picture quality slightly for a clearly smaller file. Strong lowers quality the most, so it is best for sharing or archiving rather than printing.

Why did the tool say my PDF cannot get smaller?

Some PDFs are already optimized or contain mostly text and vector graphics, which are already small. The tool only gives you a download when the result is really smaller than the original. Try the Strong level if the file still needs to shrink.

Can I still select and copy text after compressing?

Yes with Light and Balanced. With Strong, pages become pictures, so text can no longer be selected or searched. Run OCR PDF afterwards if you need searchable text again.

Can I compress a password-protected PDF?

Not directly. Unlock the PDF first with the password, then compress it.

Is there a file size limit?

You can compress one PDF at a time, up to 100 MB. Large files take longer because everything is processed on your own device.

Does it work on phones?

Yes. The tool works in modern browsers on phones, tablets and computers, though very large PDFs are faster on a computer.

Compress PDF files

Reduce the size of your PDF for email and uploads. Pick a level, compress, and download. Your file never leaves your device.

หรือวางไฟล์ PDF ที่นี่

วางไฟล์ PDF ของคุณเพื่อเปิด

ไฟล์ของคุณจะอยู่บนอุปกรณ์นี้และไม่มีการอัปโหลดขึ้นเซิร์ฟเวอร์

ทีละ 1 ไฟล์ PDF, ขนาดสูงสุด 100 MB

โฆษณา

What does Compress PDF do?

It makes a PDF file smaller by recompressing the pictures inside it, or in Strong mode by rebuilding every page as an optimized image. Smaller PDFs are easier to email and upload.

Private by design

Your PDF is compressed on your device and is never uploaded to our servers. Close the page and everything is gone.

Why use our Compress PDF tool?

Files stay private

Everything is processed on your device, with no upload.

Fast results

Pick a level and get a smaller PDF in seconds.

You choose the balance

Light, balanced or strong compression.

Free to use

No sign-up, no watermark, no software to install.