How to use this tool
- 1. Choose one PDF file.
- 2. Tap Optimize PDF.
- 3. Compare the output file size with the original.
TopdayHub / Free Tools / Optimize PDF structure online
FREE BROWSER-BASED PDF TOOL
Optimize PDF structure online
Rewrite a PDF using object streams to reduce structural overhead where possible. File-size reduction varies and is not guaranteed.
Rewrite PDF structure to reduce some overhead.
🔒 Document processing happens in your browser. The selected document itself is not uploaded to TOPDAY by this tool. The PDF library is loaded from a third-party CDN.
What to know
This is structural optimization, not image recompression. Image-heavy PDFs may not become smaller.
No account is required. For sensitive documents, review your own privacy and compliance requirements before using any web-based document utility.