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Compress PDF Online Free

Compare text-preserving optimization and optional image-based compression. Review the actual file size and keep the smallest result.

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Your PDF

01 / Choose & prepare

Drop a PDF here

One document, processed privately

Unlocked PDFs · 200 MB input maximum
Output options

Keeps selectable text and compares rewritten versions. Already optimized files may stay the same size. Bookmarks, forms, metadata, and signatures may change.

.pdf
Choose one PDF to get started.
Files stay on your device, from start to finish
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How to use Compress PDF

Three steps. No account or upload server.

  1. 01

    Upload a PDF

    Select one unlocked PDF up to 200 MB.

  2. 02

    Choose a method

    Keep text with structural optimization, or explicitly choose an image-based copy.

  3. 03

    Review and download

    Compare real sizes and save the smallest result found.

Keep a searchable application PDF

Try Balanced on an application document, then open the download and select a sentence to check that text remains usable. Use Strong only if you can accept image-based output and loss of interactive features. An already optimized original may be the smallest file.

Compare Zipora and iLovePDF workflows

Compress PDF questions

Short answers, then the practical details.

Why does my compressed PDF stay the same size?

An already optimized PDF may have little removable structure or image data. Zipora compares the original with available rewritten versions and keeps the smallest result. If none is smaller, the result says so and offers your unchanged original instead of claiming a reduction.

What is the difference between PDF compression methods?

Structural optimization preserves selectable text while rebuilding document data. Balanced also preserves selectable text. Only Strong attempts image-based pages at a minimum of 150 DPI, and keeps them only when smaller. If an image-based version wins, selectable text, links, forms, attachments and signatures are lost, so review the document before sharing it.

Will a compressed PDF ever be larger than my original?

No. The compressor compares output bytes with the original and retains the smallest available version. Compression savings depend on the document rather than a fixed advertised percentage. Review both size and readability, especially after Strong compression, before uploading the result to a form or sending it.

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