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
- Click the upload area or drag and drop one PDF file.
- Review the file size and page count.
- Choose a preset such as Balanced or Smallest file.
- Click Compress PDF.
- 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.