Compress PDF

Reduce your PDF file size right in your browser. Choose how much to compress, then download a smaller, email-ready PDF, nothing is uploaded.

Files never leave your device, everything runs in your browser.

Drop your PDF here

or click to choose files from your device, add as many as you like

Select PDF files
0 files
Size
Compression level
Light touch, keeps pages sharp while trimming size. Best for text documents you want to stay crisp.
A balanced mix of small size and good quality. The right choice for most PDFs, reports and scans.
Pushes the size down hard. Great for emailing or uploading large, image-heavy PDFs.
Smallest possible file. Fine details and small text may soften, ideal when size matters most.
Sets how sharp the images inside your PDF stay. Your text always stays crisp and selectable, only images are downsized. Lower DPI = smaller file.
Add a PDF to begin

Make any PDF smaller

Shrink large PDFs so they're easy to email, upload or store, in seconds.

You decide how much

Pick Light, Recommended, Strong or Extreme, or set your own resolution. Text always stays sharp.

Compress many at once

Drop in several PDFs and compress them together, downloaded as one tidy ZIP.

Completely private

Everything happens in your browser. Your file is never sent to a server.

Compress a PDF online, privately

PDFMingo's PDF compressor makes your documents smaller right inside your browser, so a heavy file becomes easy to email, upload or share. Choose a compression level, Light, Recommended, Strong or Extreme, or switch to Custom and dial in the exact image resolution you want. Because the work happens on your own device, your file is never uploaded, so sensitive paperwork like contracts, statements and ID scans stays completely private. Whether you want to reduce PDF file size, shrink a PDF, make a PDF smaller or simply optimize it for email, this free PDF compressor does it all in one place.

Unlike tools that flatten your whole page into a blurry picture, PDFMingo keeps your text crisp and selectable and only shrinks the heavy images inside the file, the same approach the big PDF sites use, but running entirely on your device. Scanned and image-heavy PDFs often shrink by 50-90%, and PDFMingo never hands you a bigger file, if your settings wouldn't help, it keeps your original instead. The first time you use it, a one-time engine downloads (about 15 MB) in the background and is then cached for instant use. As soon as you drop a file in, PDFMingo starts compressing in the background, so the size you see next to each level is the real output size, not a guess, and the final click finishes instantly. There's no sign-up, no watermark and no limit beyond your own device's memory.

How do I compress a PDF for free?+
Drop in one or more PDFs, choose a compression level, or set your own image quality and resolution, then click Compress and download the smaller file. It's free, with no sign-up and no watermark.
Are my files uploaded when I compress a PDF?+
No. The whole job happens inside your browser on your own device. Your file is never sent to us or stored anywhere, when you close the tab, nothing is left behind.
How much can I reduce a PDF file size?+
It depends on the PDF. Scanned and image-heavy files often shrink by 50-90%. Use the compression levels or the custom quality slider to balance size against sharpness.
Will compressing reduce the quality?+
Your text stays sharp and selectable, PDFMingo only recompresses the images inside the PDF, so it doesn't turn your pages into blurry pictures. Higher compression lowers image resolution, so use Light or Recommended to keep things crisp. And PDFMingo never makes a file larger; if a setting would, it keeps your original.
Can I compress more than one PDF at once?+
Yes. Drop in several PDFs and compress them together. When there's more than one file, they download together in a single ZIP.
Is there a file size limit or watermark?+
No watermark and no sign-up. Because the work runs on your own device, the practical limit depends on your device's memory rather than an upload cap.
Does it work on mobile, Windows and Mac?+
Yes. It runs in any modern browser on phone, tablet, Windows or Mac, with nothing to install.