Free Online Tool

Free PDF Compressor — Reduce PDF File Size Online

Compress PDF files by up to 90% in seconds. This PDF compressor works right in your browser — your documents are never uploaded, so it is fast, private and completely free.

100% freeNo sign-upNo upload — privateNo watermark
Compression level
Good to know

Pages are optimised as images. Great for scans and photo-heavy PDFs; if a file can’t get smaller we keep your original.

🔒 Your PDFs stay on your device. Nothing is uploaded to any server.

How to Compress a PDF in 3 Steps

  1. 1

    Add your PDF

    Drag and drop or browse for your PDF files. You can compress up to 10 PDFs at once.

  2. 2

    Choose a level

    Keep Recommended for the best balance, or pick Strong or Extreme when you need the smallest possible file.

  3. 3

    Download for free

    Save each compressed PDF or grab them all in one ZIP. No watermark, no account, no limits.

Why Use Our PDF Compressor?

Private by design

Compression happens inside your browser. Contracts, invoices and ID scans never leave your device.

Fast results

No waiting on uploads or server queues. Most PDFs are ready in seconds using your own device.

Four clear levels

From print-ready High quality to Extreme for the tiniest file, plus automatic protection if a file can’t get smaller.

Email and upload ready

Get PDFs under email and online-form limits such as 1 MB, 2 MB or 5 MB without special software.

Works on any device

Use it on your phone, tablet or computer. Nothing to install and nothing to sign up for.

Free, no strings

No watermark, no daily limit and no account. Compress as many PDFs as you need, whenever you need.

Which PDF Compression Level Should You Choose?

LevelBest forWhat to expect
High qualityDocuments you will printSharp pages with a moderate size reduction.
RecommendedMost PDFs, sharing and archivingClear on screen with a big size reduction.
StrongEmail attachments and online formsReadable pages and much smaller files.
ExtremeStrict upload limits, quick previewsSmallest files, softer fine detail.

Why Compress PDFs for Your Website and Business?

Large PDFs slow down downloads, fill up inboxes and get rejected by upload forms. If you publish brochures, price lists, catalogues or reports on your website, heavy PDF files also waste bandwidth and frustrate visitors on mobile data. A reliable PDF compressor keeps those files light, so they open quickly for everyone.

Compress a PDF before you attach it to an email, submit it with an application, or upload it to WordPress, WooCommerce or your document portal. For web downloads, aim for the smallest file that still reads clearly. Combine this tool with our free image compressor to keep every file on your site fast.

PDF Compressor FAQ

What is a PDF compressor?

A PDF compressor reduces the file size of a PDF document so it is easier to email, upload and store. This one optimises each page in your browser and gives you a smaller PDF to download.

Is this PDF compressor really free?

Yes. It is completely free, with no sign-up, no watermark and no daily limit.

Are my PDFs uploaded to a server?

No. Your PDF is compressed locally in your browser and never leaves your device. That keeps contracts, invoices, IDs and other private documents confidential.

How much can I reduce my PDF size?

It depends on the content. Scanned documents and PDFs full of photos often shrink by 70–90%. PDFs that are mostly text may shrink less, and if the result is not smaller we keep your original file.

Will I lose quality or the ability to select text?

Each page is re-saved as an optimised image, so very small text can look slightly softer on Strong and Extreme and the text will no longer be selectable or searchable. Use High quality or Recommended for documents you will print, and keep your original if you need to copy text from it.

How do I compress a PDF to under 1 MB or 2 MB for email or an online form?

Start with Recommended. If the file is still too big, choose Strong or Extreme. Most scans of 10–20 pages drop below 1 MB on Strong.

Can I compress several PDFs at once?

Yes. Add up to 10 PDFs, then download each one or all together in a single ZIP.

Is there a file size limit?

You can compress PDFs up to 100 MB and 400 pages. Very large files depend on your device memory, so close other tabs if a big file is slow.

Can I compress password-protected PDFs?

Not directly. Remove the password in your PDF viewer first, then compress the file here.

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