How to how pdf compression works
- 1. Look for images if the file is large.
- 2. Run a pass and read the resulting size.
- 3. Keep the original when the tool says nothing smaller was possible.
Most “PDF compression” in a browser finds the images, draws them at a smaller size, encodes them as JPEG, and writes a new file if that file is smaller. Streams can be tidied. Metadata and unused objects can be dropped. Text that is real text is not the thing getting blurry, because it is not a picture. A scan has no such privilege: its letters are pixels. The pass stops being honest when it reports a size it did not measure or a quality score it did not compute. This app keeps the original when the new bytes are not smaller, and it will say so. That single rule is the difference between compression and a ritual.
How PDF compression works stays on this device. The download is the copy you keep, and Weesize does not store a second one. Close the tab when you are finished and the bytes are gone.
Questions
Does “How PDF compression works” upload my file?
Understanding the pass does not upload an example file.
What will “How PDF compression works” actually change?
The new file replaces images when the encode is smaller. Text operators stay. A failed shrink returns the original.
When is “How PDF compression works” the wrong job?
Do not trust a percentage with no before-and-after byte counts you can see.
How do I check the result of “How PDF compression works”?
Compare the two sizes on disk, then read a scan line. Blocky type means the pixels were the text.
Can I run “How PDF compression works” with Wi-Fi off?
The pass runs offline after load, which is also how you know the images were not sent out to be compressed.