# Reduce a PDF for an upload limit without skipping the quality check
A file-size limit is a constraint, not the whole task. Start with the recipient’s instructions, make a copy of the original and identify which features the result must retain.
Choose a method for the document
Try the least disruptive option first. FileStation describes a content-preserving mode and a stronger image mode; its tool notes warn that image mode removes selectable text and interactive content, and does not guarantee a target size. FileStation: Compress PDF
Do not assume that a setting called “small” is suitable for every file. Apple’s Preview documentation also notes that compressed output can be lower quality and that the result varies with the selected options. Apple Support: Reduce the size of a PDF in Preview on Mac
Work toward the actual limit
Enter a target only when the tool offers one. Keep the recipient’s units in mind and inspect the actual output size rather than the target field. When the recipient’s rules permit it, remove irrelevant pages before compressing; do not delete required content simply to fit.
If the first result is too large, adjust one available setting at a time. Record what changed so you can go back to the last usable result. If reaching the target makes important text unreadable, stop and look for an accepted alternative, such as a better source export or an authorised different submission method.
Check usability before sharing
Open the saved result in a reader. Inspect small text, figures and page edges at a practical zoom level. Search for a distinctive phrase when the original has a text layer. Try any links or form fields that the recipient needs. Compare the output page count with the original.
A result that meets the byte limit but loses a required feature has not met the task. Keep the original, and do not use a dramatic reduction percentage as a substitute for inspection.