Compress PDF online

Compress a PDF online with basic browser-side optimization and no upload backend.

Browser-side compression depends on the original PDF. This tool rewrites the document with object streams and works best on files that were not already optimized.

Basic private PDF compression

  1. Choose the matching PDF tool.
  2. Add local PDF, JPG, or PNG files.
  3. Set page ranges, order, or output options.
  4. Process locally and download the result.

Quality checklist for Compress PDF online

  • Use the default example to confirm the tool matches this exact PDF task.
  • Check page ranges, ordering, rotation, watermark text, and output name before export.
  • Keep documents local and avoid pasting or uploading private records to public tools.
  • Open a related workflow if the next step needs merging, splitting, compression, or cleanup.

Are my PDF files uploaded?

No. The core tools run in your browser with local file APIs. Static hosting may receive normal page requests, but the selected PDF files are not sent to an upload server.

What file size works best?

Small and medium PDFs work best in a browser. Very large PDFs can use a lot of memory, especially on older phones.

Why did the file not get smaller?

Some PDFs are already compressed, contain scanned images, or use structures that cannot be reduced much without image re-encoding.