Optimize PDF Files Online
Use optimization tools when the PDF is too large to send or when its internal structure is causing compatibility problems. Compression and repair solve different problems, so choose the path that matches the file.
Optimize PDF tools
Only production-ready tools are listed here.
Compress or repair: which PDF tool do you need?
Reduce file size
Use Compress PDF when a document is valid but larger than your upload, email or sharing limit. Review the result because image-heavy PDFs can change more than text-heavy files.
Repair document structure
Use Repair PDF when a reader rejects the file or the PDF contains malformed structure that can be rebuilt safely.
Verify the result
Open important output files before replacing the original. A smaller or repaired PDF should still contain the pages and content you expect.
Frequently asked questions about optimize PDF tools
Does PDF compression always reduce a file by the same amount?
No. Results depend on the original images, fonts, embedded objects and how efficiently the source PDF was already encoded.
Can every damaged PDF be repaired?
No. Repair can rebuild some malformed structures, but files with missing or unrecoverable content may still fail.
Will PdfnMore overwrite my original file?
No. The live tools return a separate result for you to download and check.