Getting the PDF
In Chase online banking, statements are usually under Statements & documents, under the account menu. Download the PDF itself; a screenshot or a scan will not work.
What the tool reads in a Chase statement
Sectioned: Deposits and Additions, Checks Paid, Electronic Withdrawals and Fees, each with its own total, then a Daily Ending Balance table. The checks table lists the check number before the date paid; the daily balance table is skipped, not read as transactions.
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 Chase. Bank names are used only to describe statement layouts.