Drop a whole folder of PDFs and shrink them all in one go — each is compressed in your browser and packaged into a single ZIP. Nothing is uploaded.
or drop files / a folder here
Drag your PDFs onto the page — or drop a whole folder, or use "Choose folder" — and any non-PDF files in that folder are filtered out automatically. Pick a compression strength ("Light", "Recommended", or "Strong"), then click "Compress all". Each file is processed one by one, and when it finishes you click "Download ZIP" to get them all back in a single archive.
No. This is a 100% client-side tool: every PDF is read and compressed right inside your browser, and nothing is ever sent to any server. Your files never leave your device, which is also why you can use it on confidential documents without worry.
You get a single ZIP file (dockdocs-compressed.zip). Inside it, each PDF keeps its original name with "-compressed" added before the extension — so report.pdf becomes report-compressed.pdf. Each row also shows how much that file shrank, and the download button shows the overall size reduction.
You can add up to 30 PDFs per batch. There's no fixed per-file size cap — because everything runs in your browser, the real limit is your device's memory. Big or numerous files still work, they just take longer to process on a weaker machine.
Compression works by rendering each page to an image, which is great for scans and image-heavy PDFs but does little for files that are mostly plain text — there's simply not much to squeeze out. If a file barely changes, that's expected; try "Strong" for a bit more, but text-only PDFs are already close to their minimum size.
Yes, it's completely free — no signup, no watermark, no daily limit. Just open the page and start compressing.