Private, browser-based PDF compression
Reduce PDF file size for email, websites and storage. Choose a preset or control DPI, JPEG quality, grayscale and page range yourself.
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Simple three-step process
Drag the file into the upload area or choose it from your device.
Use Balanced for normal sharing, Smallest Size for maximum reduction, or Advanced for precise control.
Review the original and compressed sizes, then save the new PDF.
Designed for common tasks
Large PDFs can be difficult to send by email, upload to application portals or publish on a website. Compression reduces the amount of storage and bandwidth required while keeping each page readable.
Image-heavy PDFs, scanned documents, portfolios and reports normally benefit the most. Files that already contain optimized images or mostly plain text may show a smaller reduction.
Understand the difference
Each page is rendered and rebuilt with controlled image resolution and JPEG quality. This usually produces the biggest reduction for scanned and image-heavy PDFs.
Best for:Email attachments, online forms, scanned notes and web downloads.
The PDF structure and metadata are rewritten without turning pages into images. Searchable text, links and most interactive content remain available.
Best for:Contracts, accessible documents, text-heavy reports and PDFs that must remain searchable.
Frequently asked questions
Yes. You can compress PDFs without creating an account or paying a subscription.
No. Processing happens locally in your browser, so the selected file is not uploaded to OceanofTools.
Visual compression trades some image detail for a smaller file. High Quality keeps more detail, while Smallest Size uses stronger reduction. Lossless mode avoids visual quality loss.
Yes. Scanned PDFs are often the best candidates because their pages usually contain large images. Balanced or Smallest Size should provide a noticeable reduction.
Yes. Open Advanced mode and enter a range such as 1-3, 5, 8-10. Only those pages will be included in the compressed output.
The source PDF may already be highly optimized. A very small, text-only PDF can also be more efficient than a rasterized copy. The result panel will always show the actual size change.
Tell us which browser, device and PDF type caused the issue.
Reduce PDF file size with quality and lossless options. This page is designed to help you reduce file size with a clear browser-based workflow rather than making you install a separate utility for a small task.
Start with the original PDF, choose the pages or conversion option you need, process the document, then verify page order, text, links and visual quality in the result.
Compression is a balance between size and quality, so compare the output with the original when visual detail or print quality matters. Complex forms, signatures, uncommon fonts, scanned pages and password protection can change what a browser-based PDF workflow can preserve.
PDF tasks often look simple until a document contains scanned pages, embedded fonts, forms, links or unusual page sizes. Use Compress PDF for the specific change you need, then open the result and inspect a few representative pages. For documents that matter, check page order, legibility and selectable text before you send or archive the output, and keep the original PDF until the workflow is complete.