Compress PDF files privately in your browser

Upload one PDF, choose a compression preset, and download the result. This works best on scanned or image-heavy documents, and results can vary by file.

All PDF processing happens locally in your browser. No file data is uploaded or stored remotely.

Reduce PDF file size

Choose one PDF, pick a compression preset, and download the result when the document can benefit from re-rendering.

Browser only
Compression preset

Lower settings usually make the file smaller, while higher settings keep more detail.

Scanned and image-heavy PDFs usually compress best. Text-heavy documents may only shrink a little or even grow.

Compress a PDF without uploading it

This tool rebuilds a PDF directly in your browser so the file can be smaller when the document is made up of scanned pages or other image-heavy content. Choose one PDF, pick a compression preset, and download the result without sending anything to a server.

It is useful when you want to shrink a document before email, chat, or portal upload and you do not need the original page structure preserved as editable text.

Privacy note: All PDF processing happens locally in your browser. No file data is uploaded or stored remotely.

How the compressor works

The compressor re-renders each page and rebuilds the PDF from those rendered pages. That approach often works well for scans, receipts, and other image-heavy documents, but it can make text-heavy or vector-heavy PDFs shrink only a little.

  • Smallest file: lower render settings for the most aggressive size reduction.
  • Balanced: a practical default for everyday documents.
  • Best quality: keeps more detail, but may produce a larger file.

How to compress a PDF

  1. Click the upload area or drag and drop one PDF file.
  2. Review the file size and page count.
  3. Choose a preset such as Balanced or Smallest file.
  4. Click Compress PDF.
  5. Check the before/after size comparison and download the result.

When this is most useful

  • Reduce the size of scanned document bundles before sharing them.
  • Shrink receipts, forms, or paperwork that were saved as image-heavy PDFs.
  • Prepare a smaller attachment for email or portal upload.
  • Trim a PDF that is larger than you want, even if the savings are modest.

What to expect

Results vary by document. Scanned and image-heavy PDFs usually compress the most. Text-heavy or vector-heavy files may shrink only a little, and some PDFs can even get larger after re-rendering.

This tool does not preserve editable text layers. It focuses on a local, privacy-first size reduction workflow.

Limitations to keep in mind

  • Protected PDFs: password-protected files are not supported in this release.
  • Text-heavy PDFs: documents with mostly selectable text may not compress well.
  • Transparency: pages are flattened during re-rendering, so transparent areas may appear against a white background.
  • Large files: very large PDFs can take longer to process and may hit browser memory limits.

FAQ

Are my PDF files uploaded to a server?

No. All processing happens locally in your browser. Your file never leaves your device.

Will every PDF become much smaller?

No. Image-heavy PDFs usually compress best. Text-heavy or vector-heavy PDFs may only shrink a little, or sometimes grow.

Which preset should I try first?

Balanced is a good default. If you want the smallest file, try Smallest file. If detail matters more, try Best quality.

Can I compress a password-protected PDF?

Not in this first version. Protected PDFs are shown as unsupported.