Adobe's free online tools require a free Adobe account to download or share your result, cap most files at 100MB, and limit free users to a rolling quota of extra transactions every 7 days. iampdf skips the account, the file-size ceiling, and the quota entirely by never uploading your file to begin with.
Compared against Adobe Acrobat online’s own pricing page, last checked August 2026. Their plans can change after that date — verify current details on their site before relying on this for a purchase decision.