Compress PDF Online for Free
Reduce large PDF file sizes before sharing or uploading. Compression works best on scanned PDFs and documents with large images.
Drag & drop your files here, or click to browse
.PDFMax file size: 20MB per job
How your files are handled
This supported tool runs in your browser memory.
Processing stops when you close or refresh the tab. The output file is generated locally for download.
Best for private documents, contracts, IDs, forms, scans and internal PDFs.
Reading files...
Please do not close this window while we compile your files.
Success! Your file is converted.
Your document has been compiled and is ready for download.
How to use in 3 steps
- 1
Select the PDF file you wish to compress from your device.
- 2
Choose the compression level or target size.
- 3
Download your optimized PDF file instantly.
Supported formats
Fully supports formats: PDF.
💡 Tips to avoid font corruption
Always use standard Unicode fonts like Times New Roman, Arial, or Calibri. If using custom fonts, embed them in your document before saving.
Compress scanned and image-heavy PDFs
This compressor is strongest on PDFs made from scanned pages or large embedded images. Pure text/vector PDFs may already be optimized, so the size reduction can be smaller and aggressive compression may rasterize parts of the document.
- Use balanced compression first, then stronger settings only if needed.
- Review text readability before sending the compressed file.
- If a PDF is already mostly text, expect smaller savings.
Common errors & solutions
Please remove password protection from the file before uploading so the system can read and convert it.
Make sure your file opens correctly on your device before uploading.