Is the PDF compressor free?

Yes — there are no AI credits, registration requirements or artificial paywalls. Processing capacity is limited by your device memory.

Are my files uploaded?

No. The PDF is processed entirely inside your browser using pdf-lib and pdf.js — nothing is sent to a server.

How much can I shrink my PDF?

Results vary by file. Scanned PDFs may shrink considerably in Smaller images mode. Text-based PDFs are often already optimized and can even grow; CalcPlanet shows the actual change.

Will text remain selectable?

Preserve text mode keeps text as text but may not reduce size much. Smaller images mode rasterizes pages: text selection, hyperlinks and interactive elements will be lost. Existing digital signatures may be invalidated by either mode.

Is there a file size limit?

Processing is limited by browser memory and canvas size. For very large documents, try a desktop browser or a smaller batch.

PDF Compressor

Optimize PDF files for free in your browser. Choose text-preserving repack or image compression, with clear size and quality comparisons. No upload or signup.

Free online toolReview your output

Click or drag & drop a file

PDF files — processed locally

How to use

1Drag your PDF into the box, or click to browse.
2Choose Preserve text, or Smaller images if you accept image-only pages.
3Review the actual size comparison; download only if the result suits your needs.

Using this tool responsibly

Check the instructions and review the output of PDF Compressor before using it. Capabilities, input handling and accuracy depend on the individual tool: some operate locally in your browser, while others may use external data or services. Do not assume that every tool verifies the facts in its inputs or preserves all features of an edited file. For financial, medical, legal or tax decisions, confirm important results with an appropriately qualified professional. Read our methodology and privacy policy.

How to use

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Using this tool responsibly