Flag Reference

Output report PDF path

default: diff_report.pdf

Page range to compare

e.g. "1-10" or "1,3,7-12" — default: all pages

⚠ CE caps comparison at 10 pages regardless of range

Render resolution in DPI

default: 150

⚠ CE maximum is 150 DPI — higher values are capped automatically

Color distance threshold — lower = more sensitive

range: 0.0–1.0 — default: 0.05

0.01 = very subtle · 0.10 = obvious only

Render workers per file; A and B render in parallel

default: 2

Parallel page comparison workers

default: 4

Box blur radius applied to both images before comparing

default: 0 (disabled) · 1 = light · 2 = stronger

suppresses anti-aliasing and rendering noise

Minimum diff% to flag a page as different

default: 0.0 — use 3.0 with -align to suppress AA noise

Auto-align pages to compensate a global pixel shift between versions

default: true — two-pass coarse/fine search using MAD

Rough diff% above which alignment is attempted

default: 3.0 — a fast downsampled check runs first; alignment only triggers if this threshold is exceeded

Maximum pixel offset to search when aligning

default: 50

Path to the license file — activates Pro edition

also: set $PDFJOB_LICENSE or place pdfjob.lic next to the binary

omitting this flag runs as Community Edition

Show licensee name, expiry, machine binding status, and exit

requires a valid -license file

Print this machine's license ID and exit

format: AAAA-BBBB-CCCC-DDDD-EEEE-FFFF-0000-1111-XY

last 2 chars (XY) are check digits — send this ID to obtain a license

Verify the check digits of any machine ID string and exit

exit 0 = valid · exit 1 = invalid check digits

accepts IDs with or without dashes