Free online PDF utilities

Advanced PDF Tools Online

Use these focused utilities when a PDF is damaged, two versions need comparison, or page dimensions require precise adjustment.

Repair PDF

Fix corrupted or damaged PDF files and recover as much content as possible. Useful when a PDF won't open or displays errors.

Open Repair PDF

Compare PDF

Compare two PDF documents side by side and highlight differences. Spot changes between contract versions, reports, or revisions quickly.

Open Compare PDF

Resize PDF

Change PDF page dimensions to A4, Letter, or custom sizes. Standardize mixed documents for printing or professional submission.

Open Resize PDF

OCR PDF

Make scanned PDFs searchable with optical character recognition (OCR). Convert image-based pages into selectable, searchable text.

Open OCR PDF

What these tools can and cannot do

Repair PDF attempts to rebuild readable structures but cannot guarantee recovery from every damaged file. Compare PDF highlights visual differences and should be followed by a manual review for contracts or regulated documents. Resize PDF changes page dimensions and may scale existing content depending on the selected fit option.

Preserve your source files

Work from copies when repairing damaged documents
Keep both original versions after comparison
Check print dimensions before distributing resized PDFs

Choose the right PDF tool

Start with the result you need, then open the focused tool above. Each tool page explains what it changes, where processing happens, and which related utility can help with the next step. Your original file is not modified.