# optipdf - optimize PDF files for size Uses [qpdf](https://qpdf.sourceforge.io/) to optimize PDF files for size. ## Options | Option | Meaning | - | - | --backup=SUFFIX | Keep a backup of un-optimized PDF files. | --no-backup | Turn off backups (default). | --careful | Stop if there are warnings in the PDF (default). | --no-careful | Don't stop if there are warnings in the PDF. | --force, -f | Force overwriting backups. No effect if --no-backup. | --no-force | Prompt when overwriting backups (default). No effect if --no-backup. | --lossy | Let qpdf(1) try to optimize images for size. MAY LEAD TO IMAGE QUALITY DEGRADATION. See qpdf(1) for more information. | --no-lossy | Don't optimize images (default). This is safer. | --preserve-timestamp | Copy timestamp from original file. | --no-preserve-timestamp | Omit timestamp from original file (default). ## License Copyright (C) 2021-2022 Dan Church. License GPLv3: GNU GPL version 3.0 (https://www.gnu.org/licenses/gpl-3.0.html) with Commons Clause 1.0 (https://commonsclause.com/). This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. You may NOT use this software for commercial purposes.