Optimize & Repair PDF Online
Compress, repair and optimize PDF files free. Reduce file size without losing quality.
A PDF too large for email, a corrupted file that won't open, a scanned document you can't search — these are the problems optimization tools solve. Compress image-heavy files by 50–80% without visible quality loss, repair broken documents, add OCR to scanned pages. Everything is processed in your browser — no cloud uploads needed.
9 tools — processed in your browser, nothing uploaded
Compress PDF
Reduce PDF file size without quality loss
Open →Repair PDF
Repair a corrupted PDF file
Open →OCR PDF
Recognize text in scanned PDF using OCR
Open →Fix Page Size
Resize all PDF pages to a uniform format: A4, A3, Letter and more
Open →Linearize PDF
Optimize PDF for fast web viewing (Fast Web View)
Open →Page Dimensions
Get the dimensions of each PDF page in mm, pt or inches
Open →Deskew PDF
Automatically correct page skew in scanned PDF documents
Open →PDF to PDF/A
Convert PDF to archival PDF/A format for long-term preservation
Open →Fonts to Outline
Fix text in PDF as image — document becomes font-independent
Open →Frequently Asked Questions
How much can I reduce a PDF file size?
Compression depends on the file content. Documents with large high-resolution images can be reduced by 50–80%. Text-heavy PDFs with little graphics compress less.
Will compression affect text readability?
No. Text quality is always preserved. At high compression settings, image resolution may be slightly reduced — but not text sharpness.
Can I repair a corrupted PDF?
The Repair PDF tool can fix many common corruption issues. Severely damaged files may not be fully recoverable — the result depends on the extent of the damage.
What is OCR and when do I need it?
OCR (Optical Character Recognition) converts scanned image-based PDFs into documents with selectable, searchable text. Use it when you need to search or copy text from a scanned document.
What does linearizing a PDF do?
Linearization optimizes a PDF for web viewing — the first page loads faster because the file structure is rearranged for streaming. Useful for PDFs opened directly in a browser.
Other tool categories
Organize PDF — Merge, Split, Rotate Online
Free PDF organization tools: merge, split, rotate, delete pages. All processed in your browser, nothing uploaded.
Edit PDF Online Free
Edit PDFs online: add signatures, watermarks, images, annotations. Free, no installation needed.
Secure PDF — Password & Encryption Online
Set password, encrypt or decrypt PDF free. Secure processing in your browser.