Below we show how to shrink one or multiple PDF files to reduce their file size.
1. Upload your files
Files are uploaded over an encrypted connection. They stay safe and private. Once compressed, they are deleted.
Rather not upload your files and work with them on premise?
Use Sejda Desktop. Offers same features as the online service, and the files are processed locally.
Upload PDF files and select files from your local computer. Folders can be selected as well. Dragging and dropping files to the page also works.
Tip: Dropbox or Google Drive files
You can pick PDF files from Dropbox or Google Drive too. Expand the
Upload PDF files dropdown and select your files.
2. Komprimér PDF
Compress button and then
Download your compressed PDF. Or, click on the
More options button for advanced settings.
The compression algorithm does the following:
- Optimizes images
- Discards alternate images
- Discards piece info, spider info, threads, thumbnails and structure tree
- Removes unused fonts, images, etc.
Configure image quality
Images are optimized and saved with a JPEG image quality of 65%.
That is great for most scenarios. But, if your need it you can configure a better quality for the optimized images (even if the PDF size will be larger).
image quality select
Good (85%) or
Image resolution (PPI)
Using the standard settings images are optimized to a
72 PPI resolution.
Working in a scenario where higher image resolution is needed? Click
More options, then select
288 ppi or
720 ppi as the maximum image PPI resolution.
To lower the size of your PDF further and have a lot of images one of the options to consider is converting images to black and white only.
Here's an example of a grayscale converted image:
To enable this option select
Faster PDF compression
Processing each image takes time. A document with many images will take longer to compress.
Compressing smaller images has little effect over the overall document size. The larger images are the real target.
speed up compressing the PDF choose
Faster and we'll skip smaller images and only compress the larger ones.