Compress PDF
Re-encodes streams and downsamples embedded images. Choose the quality you want. Your file never leaves your device.
Drag & drop your files
or click to choose from your device
One PDF · best results on PDFs with lots of images
Compression shrinks a PDF's file size so it's easier to email or upload — by re-encoding internal streams and downsampling oversized embedded images, while letting you choose how aggressive to be.
How to compress pdf
- 1
Add the PDF you want to shrink
Drop in the file. Large, image-heavy PDFs benefit the most.
- 2
Pick a quality level
Higher quality keeps images crisp with modest savings; lower quality squeezes harder. Choose based on whether the PDF is for print or screen.
- 3
Compress and download
The tool re-encodes the file and gives you the lighter version to save.
Everything runs in your browser. Your file is never uploaded — there’s no server to send it to, no sign-up, and nothing to delete afterward.
Frequently asked questions
- Why is my PDF so large in the first place?
- Usually high-resolution scanned images or photos embedded at full camera resolution. Text-only PDFs are already small; image-heavy ones benefit most from compression.
- Will compression make the text blurry?
- No. Text and vector graphics stay sharp — only raster images are downsampled, and only to the degree you pick.
- How much smaller will my file get?
- It depends entirely on the content. Scanned or photo-heavy PDFs often shrink 50–80%; a PDF that's mostly text may barely change because there's little to compress.
- Does the file get uploaded for compression?
- No. Everything is processed in your browser, so even sensitive documents stay private.
- Why does compression run in the background?
- Heavy image processing happens off the main thread in a web worker, so your browser stays responsive instead of freezing on large files.