PDF to PDF Converter
Re-encode and optimize PDF files. Reduce file size, fix compatibility issues. Free.
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Supports: PDF
Advanced Options - Our defaults are optimized for the best results. We recommend you keeping the defaults unless you have a specific need.
Reset to defaults
Need help?How to Optimize PDF Files Online
- Upload Your PDF: Click "+ Add Files" to select PDF files from your computer, Google Drive, or Dropbox.
- Adjust Settings: Choose compression level and quality in Advanced Options.
- Download Optimized PDF: Click "Convert" and download your optimized PDF.
Why Re-encode a PDF?
Reduce File Size
PDFs with high-resolution images, embedded fonts, or complex graphics can be very large. Re-encoding compresses embedded images and optimizes the PDF structure — reducing file size by 30-70% while maintaining readable quality.
Fix Compatibility Issues
Some PDFs created by older software have compatibility issues with modern viewers. Re-encoding creates a clean, standards-compliant PDF.
Email Attachments
Compress large PDFs to fit within email attachment limits (typically 25MB).
Frequently Asked Questions
Will text quality be affected?
Text remains sharp. Compression primarily affects embedded images within the PDF.
Is it free?
Yes. Completely free with no watermarks, no sign-up required, and no file count limits.
Does it work on mobile?
Yes. Works in any modern browser on all devices — no app installation required.