Chromebooks cannot install traditional desktop PDF software, but compressing a PDF in Chrome is just as effective. Here is how to reduce PDF file size on a Chromebook for free — no Linux apps, no Android apps needed.
Navigate to pdfeditor.onl/compress-pdf in Chrome. The compression engine runs in your browser using WebAssembly — no server upload involved.
Click the upload area and select the PDF from your Chromebook Files app — either from local Downloads or Google Drive.
Tip: Large PDFs from Google Drive may take a moment to download to the Chromebook's local storage before you can upload them to the tool.
Choose Basic for high-quality output, Balanced for good quality at significantly smaller size, or Smallest for maximum compression. The Balanced profile (JPEG quality 65%, max dimension 1800px) is ideal for most use cases.
Click Download PDF. The compressed file saves to your Chromebook Downloads folder. Drag it back to Google Drive to replace the large original if needed.
Process one file at a time through the browser tool. For batches, merge the PDFs first, compress the merged file, then split it back if separate files are needed.
Chromebook local storage is used temporarily while processing. The tool does not permanently store files — they are processed in browser memory and cleared when you close the tab.