How much can I compress my PDF?

Depending on the quality level you choose, DocumentFlipper can reduce file size by up to 70% while keeping your document readable.

Will compression reduce image quality?

You control this with three quality presets — Low for maximum compression, Medium for balanced results, and High for the best visual quality with moderate size reduction.

Is there a file size limit?

Free users can compress files up to 25MB. Pro users get up to 500MB.

Does compression add a watermark?

No. DocumentFlipper never adds watermarks to your files, on free or paid plans.

What compression level should I use?

For most use cases, Balanced is the best choice — it cuts file size significantly with no visible quality loss. Use Maximum for screen-only PDFs, and Low for documents you'll print or present professionally.

Compress PDF Free Online — Reduce PDF Size

How to compress a PDF

1
Upload your PDF
Click the upload area or drag your PDF onto the tool.
2
Choose compression level
Select light, medium, or heavy compression depending on how small you need the file.
3
Download the compressed PDF
Click Compress PDF. Download the smaller file when processing finishes.

About PDF compressor

Large PDF files are a problem when you need to email a document, upload it to a web form with a file size cap, or store large volumes of documents efficiently. DocumentFlipper's compression tool reduces PDF file size by optimising images, removing redundant data, and applying efficient encoding — without visibly degrading the document's readability.

Three compression levels are available. Light compression makes modest reductions while preserving high image quality — ideal for print-ready documents. Medium compression achieves a good balance between file size and visual quality, suitable for most office documents. Heavy compression maximises size reduction at the cost of some image sharpness, best for documents that will be read on screen rather than printed.

Your PDF is processed on our secure server and deleted within two hours. The compressed file is available for immediate download.

Frequently asked questions

How much can I compress my PDF?: Depending on the quality level you choose, DocumentFlipper can reduce file size by up to 70% while keeping your document readable.
Will compression reduce image quality?: You control this with three quality presets — Low for maximum compression, Medium for balanced results, and High for the best visual quality with moderate size reduction.
Is there a file size limit?: Free users can compress files up to 25MB. Pro users get up to 500MB.
Does compression add a watermark?: No. DocumentFlipper never adds watermarks to your files, on free or paid plans.
What compression level should I use?: For most use cases, Balanced is the best choice — it cuts file size significantly with no visible quality loss. Use Maximum for screen-only PDFs, and Low for documents you'll print or present professionally.