Tools in This Collection
PDF Optimization Workflow
Large PDFs create friction: email attachment limits, slow upload times, and storage bloat. The two tools here handle the two most common optimization tasks — reducing file size and cleaning up metadata — without uploading your files anywhere.
Reducing PDF File Size
The PDF Compressor reduces file size by removing redundant metadata, unused objects, and duplicate content streams. Typical reduction for text-heavy PDFs: 10-30%. Image-heavy PDFs (scanned documents, reports with embedded photos) compress less in the browser since recompressing embedded images requires server-side processing. For a 10MB presentation PDF with embedded charts and fonts, structural cleanup typically brings it under the 10MB Gmail attachment limit.
Cleaning Up PDF Metadata
The PDF Metadata Editor lets you view and modify the document properties stored inside a PDF: title, author, subject, keywords, creator application, and creation/modification dates. Many PDFs retain metadata from the original authoring application — a Word document converted to PDF may list the author's full name, company, and internal file path. Before sharing a document externally, strip or update this metadata to remove identifying information or update the title to something meaningful.
Frequently Asked Questions
How much will the PDF compressor reduce my file size?
Structural compression typically reduces PDF size by 10-30% for text-heavy documents. PDFs that are primarily scanned images won't compress as much, since the embedded image data can't be recompressed in the browser. For image-heavy PDFs, the reduction may be 5-15%.
What metadata does a PDF contain?
PDFs commonly store: title, author name, subject, keywords, the application that created the document, and creation/modification timestamps. Some PDFs also include custom properties added by enterprise document management systems. The PDF Metadata Editor shows all stored properties and lets you edit or clear them.
Should I remove metadata before sharing a PDF externally?
It depends on the document. PDFs converted from Word or PowerPoint often contain the author's name, company name, and sometimes internal file paths or revision history. For documents shared publicly or with external parties, reviewing and cleaning metadata is good practice — especially for legal, financial, or HR documents.