Free PDF Compressor
Reduce a PDF file locally in your browser. Choose a stronger image-based option for scanned or image-heavy documents, or use a quick structural save to keep text selectable.
Compress a PDF
Choose a document. It stays in your browser while it is processed.
Browser memory use depends on document size and page count. Keep your original PDF until you have checked the output.
HOW IT WORKS
Free PDF Compressor in three steps
- Choose your input.Select a file, type your content or enter image dimensions.
- Adjust the options.Pick the format, size or quality that fits your task.
- Download or copy.Check the result, then save it to your device.
PRACTICAL NOTES
Choose the right kind of PDF compression
Quick optimize re-saves PDF structure while keeping text and vector content selectable; it may not reduce an already optimized file. Strong image compression rebuilds each page as a JPEG image, which can shrink scans but removes selectable text and may reduce fine detail.
- Compare the output file size with the original before replacing it.
- Keep the original PDF and check every page, especially small text and diagrams.
HELP & ANSWERS
Frequently asked questions
Does the quick PDF option keep text selectable?+
Yes. Quick optimize re-saves the PDF structure and keeps text and vector content. Its size reduction depends on how the original was made.
What changes with strong image compression?+
Pages are rebuilt as JPEG images. This can reduce scanned PDFs, but text is no longer selectable or searchable and fine details may soften.
Can every PDF be made smaller?+
No. A PDF that is already compressed may stay the same size or become larger after saving. Compare the output with the original.