Large PDFs are slow to email, hard to upload, and frustrating to share. The good news: you can usually shrink a PDF dramatically while keeping it looking clean. This guide shows you how to compress a PDF for free and explains what actually affects file size.
What makes a PDF large?
Most of a PDF's weight comes from images and scanned pages, not text. A document that is mostly text is already small. A PDF full of high-resolution photos or scans can be many megabytes. That means the biggest savings come from optimising images, not the text layer.
Compress a PDF in three steps
Using FreePDFtxt's free Compress PDF tool:
- Open the Compress PDF tool and drop in your file.
- Choose a compression level — lighter for archival quality, stronger for the smallest size.
- Download your smaller PDF. Nothing is stored; your file is removed automatically.
Keeping quality high
To keep text crisp, the tool never rasterises your text — it stays as real, selectable characters. Images are re-encoded at a sensible resolution so the document still looks sharp on screen and in print. If you need archival fidelity, pick a lighter setting; if you only need to email or upload, a stronger setting is usually invisible to the eye.
When not to compress
If a PDF is already small (a few hundred kilobytes of mostly text), compression won't help much. And if you need pixel-perfect print output for a press, keep an uncompressed master and only compress copies you share.
Is it private?
Yes. Files are processed temporarily and removed automatically — they are never shared. For full control you can also self-host FreePDFtxt.
Ready? Compress your PDF now →