Compress PDF — Shrink big PDFs to a smaller size
Reduce the file size of a PDF by re-rendering each page as an optimized image at your chosen quality. This works especially well on scanned documents and image-heavy PDFs, where it can cut the size dramatically while keeping the pages readable. Everything runs in your browser — your file is never uploaded.
How to use Compress PDF
- Add one PDF file.
- Pick a compression level — Strong gives the smallest file, High keeps more detail.
- Click Process and wait while each page is re-rendered.
- Check the before/after size, then Save the compressed PDF.
- Tip: compression works best on scanned or photo-heavy PDFs; text-only PDFs may not shrink much.
Why use this Compress PDF tool
- Free & unlimited — no sign-up, no watermark and no daily limits.
- 100% private — the Compress PDF tool runs in your browser, so your files are never uploaded.
- Works on every device — Windows, Mac, Linux, Android and iPhone, straight from the browser.
- Fast — process your PDF and download in one click.
Frequently asked questions
How do I use the Compress PDF tool?
Reduce the file size of a PDF by re-rendering each page as an optimized image at your chosen quality. This works especially well on scanned documents and image-heavy PDFs, where it can cut the size dramatically while keeping the pages readable. Everything runs in your browser — your file is never uploaded. Just add your file(s), set the options, and download the result — it runs instantly and free in your browser.
Is Compress PDF free and private?
Yes. Compress PDF is completely free with no watermark and no sign-up, and it works 100% in your browser, so your files are never uploaded.
What is compress pdf used for?
It's ideal for tasks like compress pdf, reduce pdf size, shrink pdf — all handled locally on your device with no limits.
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