Getting the PDF
In Bank of America online banking, statements are usually under Statements & Documents, on the account page. Download the PDF itself; a screenshot or a scan will not work.
What the tool reads in a Bank of America statement
Sectioned with signed amounts (withdrawals print with a minus sign) and two-digit years. Checks list the date, then the check number. Account numbers printed in groups ("0000 1111 2222") are read as one number.
Before comparing anything, the tool adds the lines it read to the beginning balance and checks the result against the ending balance printed on the statement. If they disagree it says so, instead of guessing.
Files are read inside your browser tab. Nothing is uploaded, no account is needed, and nothing is saved: closing the tab clears everything. The processing code is open source.
nildiff is independent and is not affiliated with or endorsed by Bank of America. Bank names are used only to describe statement layouts.