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FREE PDF GUIDE / LOCAL PROCESSING

Repair and optimize a PDF

Repair / optimize uses QPDF to rebuild supported PDF structure and optionally recompress content streams. It is a useful first attempt when a document needs structural cleanup or you want to reduce size without intentionally converting its pages to images.

Repair and optimize a PDF

THE WORKFLOW

How to repair and optimize a PDF

  1. Open Repair / optimize PDF and choose the file.
  2. Select stream recompression and optional linearization according to your needs.
  3. Run Repair & optimize, compare the file size and inspect the saved document in a PDF reader.

PRACTICAL EXAMPLES

Choose the workflow for your document

Optimize a text-based PDF before rasterizing

Try stream recompression before image-based compression when you need selectable text and page structure. Compare the exported size and verify forms, links and other features you rely on.

Linearize a PDF for web viewing

Enable linearization to reorganize the file for readers that support progressive loading. The benefit also depends on the reader and the server hosting the PDF, so it is not a promise of faster loading in every situation.

BEFORE YOU SHARE

What to check in the result

Repair cannot reconstruct page content that is missing from a truncated or severely damaged file. An encrypted input may need its known password removed first. Recompression may produce little reduction or a larger file if the original was already efficient; keep whichever verified copy meets your needs.

COMMON QUESTIONS

Questions about this PDF task

Can repair recover every corrupted PDF?

No. It can rebuild supported structure but cannot restore bytes or pages that are absent or unreadable.

Is optimization the same as PDF image compression?

No. This workflow uses stream and structure operations. The separate compression modes render pages as images.

What should I do if optimization fails?

Confirm the input opens in a PDF reader and unlock it first if needed. Retain the original and obtain a fresh source when the file is incomplete.

MORE PDF TASKS

Keep working with your document

Compress a PDFRemove a known PDF passwordInspect PDF properties and page sizes