Check a PDF before sending looks for signals: more than one file ending, a script marker, an attachment, a GPS tag, text under a dark shape, white text, and text parked off the page. Each hit is one sentence grouped as high, medium, or info. Fix all rebuilds the pages without those markers and then runs the check again. Nothing risky found is shown only when the second check is empty. That sentence means this checker is quiet. It does not mean a person could not still find something another tool would see. A black rectangle left over a sentence is reported, because the words can remain underneath.

Check a PDF before sending 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.

• No upload: the scan reads bytes in this tab and the fix writes a new file beside that reading.
• Speed: the file does not travel to a server and back, so the wait is only the work itself.
• Quality: the original is kept when the new file would be worse or is not actually smaller.