Optimize PDF Tools

Improve a PDF before delivery by reducing file size, fixing damaged files, making scans searchable and locking final page content.

Use this hub when the PDF already exists but needs to be smaller, cleaner, more reliable or easier to review. These tools sit between creation and final sharing: they help reduce upload failures, repair broken documents, prepare scanned files for search and keep finished forms or annotations stable.

Choose the right optimize PDF tool

Compress PDF Reduce the file size of your PDF online. Repair PDF Repair a damaged PDF and recover data from a corrupt file. OCR PDF Turn scanned PDFs into searchable, selectable text Compare PDF Upload two PDFs and instantly highlight every difference between them Flatten PDF Flatten a PDF so form fields, annotations, and layers become permanent page content. PDF to PDF/A Convert your PDF to PDF/A for long-term archiving. Summarize PDF AI summarizes a long PDF into key points PDF to Text Extract all the text from a PDF into a plain TXT file for free.

Compare optimize PDF tools

Tool	Best when	Use next
Compress PDF	Reduce the file size of your PDF online.	Resize PDF, Merge PDF
Repair PDF	Repair a damaged PDF and recover data from a corrupt file.	Compress PDF, Merge PDF
OCR PDF	Turn scanned PDFs into searchable, selectable text	Scan to PDF, PDF to Word
Compare PDF	Upload two PDFs and instantly highlight every difference between them	Merge PDF, Edit PDF
Flatten PDF	Flatten a PDF so form fields, annotations, and layers become permanent page content.	Fill PDF Forms, eSign PDF
PDF to PDF/A	Convert your PDF to PDF/A for long-term archiving.	Compress PDF, PDF Converter
Summarize PDF	AI summarizes a long PDF into key points	Chat with PDF, Translate PDF
PDF to Text	Extract all the text from a PDF into a plain TXT file for free.	PDF to Word, OCR PDF

How to choose among optimize PDF tools

Reduce size before email or upload

Use Compress PDF when a file is too large for email, portals or form uploads, and Resize PDF when the page dimensions themselves are wrong - for example an oversized scan that should print on A4 or Letter. Compress after merge, organize or signing so the final delivered file is the one being reduced. If the target is an inbox, see how to compress for an email attachment under 25 MB.

Compress PDF Resize PDF Merge PDF

Fix or prepare difficult PDFs

Use Repair PDF when a file will not open correctly, PDF to PDF/A when it needs an archive-ready format, and OCR PDF when a scan should become searchable. When repair fails, the deeper guide to fix a corrupted PDF lists recovery options.

Repair PDF PDF to PDF/A OCR PDF

Finalize review and form output

Use Compare PDF before approving changes, Flatten PDF when forms or annotations should become permanent, and Summarize PDF when a long document needs quick review.

Compare PDF Flatten PDF Summarize PDF

Quality checks before you download

Check visual quality after compression, especially on image-heavy reports and scanned PDFs.
Repair a damaged document before trying to compress, convert, sign or protect it.
Flatten only after signatures, form fields and comments are final because the output is meant for delivery.

Best workflow

Repair first if the file has errors, missing pages or trouble opening.
Run OCR when the PDF is scanned or image-only and you need searchable text.
Compare, flatten and compress near the end so the final document is stable and easy to send.