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Compress PDF
Reduce PDF file size while maintaining quality
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Drop .pdf files here
or click to browse
How it works
- 1. Upload your .pdf file
- 2. Enter your email address
- 3. Download your converted file
About Compress PDF
Large PDF files are hard to email, slow to upload, and take up unnecessary storage. PDF Ninjas compresses your PDF by optimising internal objects, removing redundant data, and shrinking embedded resources — all while maintaining readable quality. Ideal for compressing scanned documents, image-heavy reports, and presentations before sharing.
Frequently Asked Questions
How much will my PDF shrink?▾
It depends on the content. PDFs with many images can shrink by 50–80%. Text-only PDFs may reduce by 10–30%.
Will compression reduce the visual quality?▾
We use a balanced compression level that reduces file size significantly while keeping text sharp and images readable.
Can I compress a PDF that is already compressed?▾
Yes, though the size reduction will be smaller. If the PDF was previously compressed, there is less redundant data to remove.
Is there a file size limit?▾
There is no strict limit, though very large files (over 100MB) may take longer to process.