Free PDF Compressor

Reduce the file size of a PDF, free and with no sign-up. Upload your document and the tool re-encodes its images to make the file smaller and easier to email or upload. Most PDFs shrink noticeably, though files that are already optimized or made of plain text may not get much smaller. No watermark, no account, and files are deleted from our servers automatically after processing.

Max file size: 60 MB Up to 1 file per upload Get 500 MB and up to 2 files per upload, free Sign up free
Uploading your PDF…

0%

The free PDF Compressor reduces the size of a PDF so it is easier to email, upload, or store. Upload your file and the tool re-encodes the images inside it at a lower size, producing a smaller PDF you can download.

Being straight about what compression does: it works by reducing the size of images in the document, so a PDF full of high-resolution photos or scans can get dramatically smaller. A PDF that is already optimized, or one made almost entirely of plain text, has little image data to shrink, so the reduction may be small or occasionally none at all. The tool will not make a file worse, but it also cannot shrink data that is already as small as it sensibly gets.

How to Compress a PDF

  1. Upload your PDF. Select the file or drag it onto the upload area.
  2. Compress. The tool re-encodes the images to reduce the overall file size.
  3. Download. Save the smaller PDF to your device.

What Compression Can and Cannot Do

Compression trades some image detail for a smaller file. For most documents, especially those with photos or scanned pages, the size drop is significant and the visible quality change is minor. For a PDF that is already compressed, or a text-only document, there is little to remove, so do not expect a large reduction. If your goal is a specific small target and the file is mostly text, the size is likely already close to its minimum.

Is My File Safe?

Your files are handled securely. Uploaded PDFs are deleted from our servers immediately after processing, whether it succeeds or fails. The result is stored under a random, unguessable name and stays available to download for up to two hours, then it is automatically and permanently deleted. All uploads and downloads use a secure HTTPS connection.

When to Compress a PDF

  • Emailing a large file. Get under an attachment size limit without splitting the document.
  • Uploading to a form. Meet a size cap on a job application, government portal, or submission system.
  • Saving storage. Shrink a folder of scanned documents that are taking up space.
  • Faster sharing. Send a lighter file that downloads quickly for the recipient.

Related PDF Tools

Also useful: convert a PDF to grayscale to shrink it further, merge PDFs before compressing a bundle, or repair a damaged PDF.

Frequently Asked Questions

Frequently Asked Questions (FAQs) is a list of common questions and answers provided to quickly address common concerns or inquiries.

Is the PDF Compressor free?

Yes, completely free with no sign-up and no watermark added to the compressed file.

How much smaller will my PDF get?

It depends on the file. PDFs with high-resolution images or scans usually shrink a lot, while files that are already optimized or made mostly of text may only get slightly smaller, or not much at all.

Will compressing reduce the quality?

Compression lowers image detail to save space. For most documents the change is barely noticeable, but very heavy compression of image-rich files can show some quality loss.

Why did my file barely get smaller?

That usually means it was already optimized or is mostly plain text, so there is little image data to compress. The tool cannot shrink data that is already close to its minimum size.

Are my files kept private?

Yes. Uploaded files are deleted immediately after processing and the result is automatically deleted after two hours. All transfers use HTTPS.
Share on Social Media:
Popular Tools