5 min read
How PDF compression works without losing quality
A practical guide to shrinking PDFs online, keeping text readable, and choosing the right compression level.
Why file size changes
Compression removes redundant data and recompresses images, which is why browser-based PDF tools can reduce size without changing the document structure.
What affects quality
Image-heavy PDFs benefit from moderate compression, while text-heavy files can usually be compressed more aggressively.
Best practice
Keep a copy of the original, compare the output, and use browser-based workflows for routine jobs that do not need server-side processing.