What this is not. This is a text comparison, not a code review and not a substitute for a human checker. Sheets are matched by sheet number, so a renumbered sheet shows up as one removed plus one added. Scanned pages with no text layer cannot be compared. Always confirm against the sheets themselves before you act on a result.
1. Earlier set
2. Later set
3. See what changed
1. Earlier set
The revision you are comparing from. PDFs only, as many files as the set has.
Drop the earlier set here, or click to choose files
Read in your browser only. Nothing is sent to any server.
No files yet.
2. Later set
The revision you are comparing to. Comparison runs on its own once both sets have files.
Drop the later set here, or click to choose files
Read in your browser only. Nothing is sent to any server.
No files yet.
3. What changed
0sheets in earlier set
0sheets in later set
0added
0removed
0changed
0unchanged
Added in the later set
Removed from the earlier set
Changed
Unchanged (0)
Could not compare
Sheets are matched by sheet number. A renumbered sheet appears as one removed plus one added. Title detection is a heuristic: the longest line on the page. Content comparison uses the page text, so a re-export that only reflows text can still show as changed.