How to compress a PDF carefully
Learn what PDF compression changes, when image-based compression is useful, and how to check the output before sharing it.
1. Check the original file
Note the original file size and open the PDF to confirm that every page displays correctly. If the document contains forms, selectable text, links, signatures or accessibility structure, keep an untouched original.
2. Choose the right method
Image-heavy scans may benefit from image compression or reduced resolution. Text-based documents may not shrink much without changing their contents. Image-based compression can turn pages into pictures and remove selectable text and interactive elements.
3. Compare quality and size
After compression, compare the new file size with the original. Zoom in on small text, inspect diagrams and check pages with fine detail. A smaller file is not automatically a better file.
4. Keep an original copy
Save the compressed copy under a new name. For legal, business, archival or accessibility-sensitive documents, confirm that the output meets the applicable requirements before replacing the original.
Try the related free tool
Use Toolora's PDF compressor to explore the available compression options. Results depend on the PDF structure and chosen method.
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