Exact size first
PDF too large to upload?
Do not compress blindly. Start from the exact limit you need, prepare the file on your Android phone, review readability, and export a clean copy only when the result is usable.
Start from the real limit
Use the size the upload workflow actually asks for: 300 KB, 500 KB, 2 MB, or another exact target in GENERAL.
Do not crush readability
The goal is not the smallest possible PDF. The goal is a file that fits while staying readable enough for the task.
Review before clean export
Prepare first, inspect size and readability, then export the clean copy only when the result looks right.
Fix pages before sending
Rotate, reorder, delete, merge, split, OCR, sign, or add photos before the final clean export when the document needs it.
Sensitive document? Avoid random web converters
PDF contents are processed on-device by default and are not uploaded to PDF Ready servers. Read the no-upload PDF prep guide.
When another system still rejects the file
The destination system makes the final decision. If it still rejects the PDF, recheck the real limit, protected-file rules, page count, readability, and compatibility requirements.