Large PDFs are slow to upload and often too big to email. Compressing a PDF shrinks the file while keeping it readable, so you can attach it, upload it or store it without hassle. Here is the quickest free way to do it.
Compression works best on scanned or image-heavy PDFs, where most of the file size comes from pictures. For text-only documents the savings are smaller because text is already compact. Everything runs in your browser, so your file stays private.
Will compressing reduce quality?
Slightly — you choose the balance. Higher compression means smaller files but softer images.
Is it free?
Yes, completely free with no signup.
Ready to go? Open the free Compress PDF tool — no signup, no watermark, and your files stay private. Browse all 140 free tools or read more on the blog.