Compress PDF and Reduce File Size

Reduce PDF file size for sharing, uploading and archiving. Compress one PDF or a batch of up to 100 PDFs.

Local processing

Drop PDF files here or click to select Select up to 100 PDF files PDF only · up to 100 files · 50 MB each · 500 MB total

Reduce PDF size for email, forms and storage. Select one PDF or a batch, compress the files locally, then download the optimized result.

Compress PDF guide

PDF files often need to fit strict size limits for email, job applications, government portals, school systems or business platforms. A document may become large because it contains images, scans, embedded fonts or many pages. Compression aims to reduce file size while keeping the document usable.

PDF compression results depend on the source file. A scanned PDF with large images may shrink more than a simple text document, while a file that is already optimized may not become much smaller. Compare the before-and-after size and check readability after compression.

Compression is especially useful after Merge PDF, JPG to PDF, PNG to PDF or Image to PDF, because those workflows can produce larger documents. After compression, you can continue with PDF Tools or PDF Converter if the file needs more editing or conversion.

Common use cases

Reduce PDF size for email attachments.
Prepare documents for upload limits.
Make scanned PDFs easier to share.
Optimize large reports or image-heavy PDFs.

Best practices

Start with clear images before creating a PDF.
Compress after merging image-heavy files.
Check readability after compression.
Use image optimization before PDF creation for smaller results.

Compress PDF and Reduce File Size