Why diffing Markdown works better than reading
Binary formats hide changes: DOCX and PDF revisions differ in ways that are invisible to a quick skim. Markdown is plain text, so standard diff tools compare it line by line. Heading structure also anchors the diff - when a section title changes, the diff shows the section boundary, so you can jump straight to the changed region instead of scanning page by page.
A repeatable review workflow
1) Upload the old version to MarkItDown Online and download the Markdown. 2) Convert the new version the same way. 3) Run any diff tool on the two .md files. 4) Review only the changed hunks in context. Typical conversions finish in 2-5 seconds per file, so even a multi-version review takes minutes. Batch conversion handles both versions in one pass.
What to watch for in the diff
Focus on numbers, dates, obligation wording, and list items - the lines that change intent. Small formatting shifts from source layout may add noise; ignore diffs that only touch whitespace or heading markers. If a whole section reorders, the diff marks it as delete-plus-insert, which is still easier to verify than re-reading. Use getmarkitdown.com when both versions arrive as PDF or Office files and you need an auditable change record. Feedback: sapsap@qq.com.