PDF Compressor Online

Reduce PDF file size for easier sharing, faster email delivery, and quicker uploads — without sacrificing readability. Optimizes embedded images and content streams within the PDF while keeping text crisp and vector graphics sharp. All processing happens in your browser using pdf-lib, so your document is never uploaded to any server. No account required, no watermarks, no daily limits. Works on desktop and mobile browsers. Batch mode lets you compress multiple PDFs at once and download them all as a ZIP archive.

• Complete privacy — your PDF is compressed locally in your browser and never sent to any external server.
• Text and vector graphics remain pixel-perfect — only embedded images are recompressed to reduce size.
• No watermarks, branding, or page limits added to your compressed PDF.
• Useful before emailing, uploading to portals with file size limits, or storing in cloud drives.
• Works on any device — desktop, tablet, or mobile — without installing any software.
• Batch mode — drop multiple PDFs and compress them all in one click, then download as a ZIP.

• 💡PDFs with many embedded high-resolution photos benefit most from compression. PDFs that are mostly text see smaller gains.
• 💡If you need a more aggressive size reduction, consider also splitting out pages you do not need before compressing.
• 💡Check the compressed PDF visually on screen and at zoom level before sharing — ensure image quality is acceptable for your use case.
• 💡For the smallest possible file, combine PDF compression with merging only the pages you need using the PDF Splitter first.