Standard PDF compression can only do so much — it strips metadata and rebuilds internal structures, but it cannot touch the images that make up most of a PDF's file size. Our optimize PDF tool goes further by rendering every page as a high-quality compressed JPEG, then rebuilding the entire document from those optimized images.
This approach is especially effective for scanned documents, slide decks, and image-heavy reports where embedded images account for 90% or more of the file size. By re-encoding each page at your chosen quality level, the optimizer can achieve 50–80% reductions that simple metadata stripping cannot match.
You stay in control with three quality presets: Balanced for maximum compression, High Quality for a great balance between size and clarity, and Maximum for near-lossless output. The processing pipeline runs entirely in your browser — your files are never uploaded to any server, making this tool safe for confidential documents.
Watch each step of the optimization process in real time: PDF analysis, page rendering, image compression, and PDF rebuilding. When it finishes you will see the exact before-and-after file sizes so you can decide whether the trade-off is right for your use case.