Quality presets
Use clear presets instead of guessing at technical settings.
Compress a PDF online
Upload your PDF, reduce file size with practical quality presets, and export a smaller document that is easier to share.
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Inside the editor
How to compress a PDF in PDF Gain
Compression runs inside the same editor workspace. Choose a compression level, apply it, review the result, and save or export the smaller PDF.
01
Upload your PDF
Choose the file you want to reduce. The editor opens the document so you can inspect pages before compressing.
02
Open the Compress tool
Select Compress from the editor rail to reveal the compression controls in the settings panel.
03
Choose a compression level
Pick High Quality for light optimization, Balanced for most files, or Small File for stronger image downsampling.
04
Save or export the optimized file
After compression finishes, save to keep the smaller file and export the PDF when you are ready to share it.
Compression controls in the editor
Size feedback
The editor reports the before and after size when compression reduces the document.
Works with other edits
Compress after editing, signing, or managing pages so the exported file includes all changes.
Export when ready
Download the compressed PDF or export pages as images from the same Export dialog.