Press Compress PDF. The file is optimised on the server.
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Check and download
The result shows the new size next to the old one, so you can see what you saved.
Why compress a PDF
Almost every upload form has a limit, and scanned documents blow straight past it. A phone photograph of a three-page form can easily be twelve megabytes, because it is really three large photographs wearing a PDF as a coat. Government portals often cap at two, email at twenty-five.
Compression rewrites the images and internal structure so the same document takes less room. Text stays crisp because text is not what makes the file large — the pictures are.
When it helps most
Scanned documents — the biggest savings, because the scans dominate the file size.
Portal uploads — getting under a 2 MB or 5 MB cap.
Email — attachments that bounce for being too large.
Archives — storing years of paperwork without it growing indefinitely.
A PDF that is mostly text will not shrink much, because there was little to remove. That is not a failure — it means the file was already efficient.
What happens to your files
Worth being straight about this, because it differs from most tools on this site. Our word counter and JSON formatter run entirely inside your browser and send nothing anywhere. PDF work is not like that — it has to open and rewrite the document structure, which is more than a browser does reliably across every PDF it might be handed.
So your file is uploaded over an encrypted connection, processed on our server, and the original is deleted as soon as the new file has been produced. The result sits behind a private download link that expires. Nothing is read, indexed or kept for any other purpose.
If a document is confidential enough that it must never leave your machine, use a desktop application instead. That is true of every online PDF tool, not just this one.
Frequently Asked Questions
Yes. No sign-up, no watermark on the output, no page limit and no trial that runs out. It is free because it is a useful thing to be known for, not because it is a sample of something paid.
It depends entirely on what is inside. Scanned or image-heavy PDFs often drop by more than half. A text-only PDF may barely change, because there was nothing much to compress in the first place.
Yes. Text is stored as text and is not degraded. Compression works on the images and the internal structure, which is where the size actually lives.
Yes, it is. The work has to happen on a server, so your file is uploaded over an encrypted connection, processed, and the original deleted as soon as the new file exists. The download link is private and expires. If a document must never leave your machine, use a desktop application instead.
You can, but there is little point. The second pass has almost nothing left to remove and may make no difference at all.
Yes. Pick the file from your phone's storage or from Drive, and the result downloads like any other file.
