Optimize PDF structure
Rewrite PDF streams and remove unused objects.
Drop your files here
Make something new. Keep everything private.
Multiple files welcome · processed one at a time
Select a tool to see its supported formats and conversion limits. Large files may exceed your browser’s memory.
Before processing large files
On phones and tablets, start with files under 20 MiB and keep this tab in the foreground. Video, OCR and 3D operations can use several times the input size in memory. Desktop browsers generally have more room, but the 128 MiB job limit is not a guarantee that every file will fit. Smaller batches reduce memory pressure.
Supported input formats
- Portable Document Format (.pdf)
Output format
Portable Document Format (.pdf)
Support applies to this conversion direction. Check the limits below for features that may change or be discarded.
Compare all supported formats and conversion limits →How to use Optimize PDF structure
- Add your supported file using the chooser or drop zone.
- Review the settings and conversion limits before processing.
- Select Convert files, then download the result.
What to expect
- Lossless structural optimization; image resolution is unchanged and files may grow.
Engine: mupdf. The engine may need a first-use download. Your file stays in this browser session.Check conversion engines and offline requirements.
Conversion settings
These settings are available in the converter above.
- Input PDF password
About this conversion
Is optimize pdf structure free?
Yes. This tool runs on your device without an account or a conversion fee.
Are files uploaded during conversion?
File processing happens locally in your browser. Engines may download their code on first use; your input files are not sent to a conversion server. Read how file privacy works.
What if conversion fails?
Check that the file matches a supported input, review the engine’s limitations and try a smaller representative file. If the engine cannot load, check its engine assets and browser requirements. The app reports failures without switching to a remote converter.
Continue with your output
These tools accept this tool’s output format. Each step has its own settings and fidelity limits.
- PDF to PNG
Render selected PDF pages as separate PNG images.
- PDF to JPEG
Render selected PDF pages as separate JPEG images.
- Extract PDF text
Extract embedded text in page order.
- Merge PDFs
Join PDF files in queue order.
- Extract / reorder PDF pages
Export selected pages in the order entered.
- Split PDF
Export each selected page as a separate PDF.
More pdf tools
- Rotate PDF pages
Rotate selected pages in 90-degree increments.
- Password protect PDF
Save a PDF with AES-256 encryption.
- Remove PDF password
Remove encryption after authenticating with a known password.
- Permanently redact a PDF area
Remove text, image pixels and touched vector art in a selected rectangle.
- Replace PDF text
Remove every matching text occurrence on selected pages and insert replacement text.
- Insert PDF text / typed signature
Add text at a chosen position and bake it into the page.