On this page
Before you start
- A copy of a representative PDF that you are allowed to modify
- The required output, such as one merged PDF, searchable text or a smaller file
- Any recipient requirements for file size, forms, signatures or accessibility
Choose by the job
| Your task | Start with | Check before choosing |
|---|---|---|
| Combine or split PDF pages | Merge PDF Files Offline on Windows | Check page order and the saved document. Merge does not preserve source bookmarks. |
| Make a scan searchable | OCR a Scanned PDF Offline on Windows | Install the required language data before offline use. Check names, numbers and columns in the recognized text. |
| Reduce a PDF toward an upload limit | Compress a PDF Toward a Size Limit Offline | Compression is best effort. Check the actual file size and readable detail before sharing. |
| Straighten a photographed document | Osenpa PDF Tools: Fix Documents (Beta) | Review the corrected page. Correction cannot restore detail missing from the photograph. |
Follow these steps
Choose what you want to make
For example: one PDF from three files, a scan with searchable words or a smaller file for an upload. Use the table to find the matching tool.
Open the matching tool
Follow the linked guide for that task. If you need OCR or document correction offline, download the optional components while you still have internet access.
Arrange the files, then choose Create merged PDF. Enlarge image. - Create merged PDF saves the files in the listed order.
Try a separate copy
Keep your original and try a copy of the document. Include any small text, complex pages, forms or links you need in the result.
Open and check the saved file
Open it in another PDF reader. Check the page order and important details. Test search, copying, forms or signatures when needed, and check its size if you have an upload limit.
Check your result
- The selected action supports the exact change you need.
- Any required OCR language data or document-correction component is installed before offline use.
- The output opens in your usual reader and preserves the behavior your recipient needs.
- You have checked the saved file, including its actual size when an upload limit applies.
If you need more help
Page operations, OCR and editing are different
Merging joins documents, splitting creates smaller files, and organizing moves or rotates whole pages. These actions do not change a sentence inside a page. Existing-paragraph and full-layout editing are outside Osenpa PDF Tools' scope.
OCR recognizes characters in a page image. It can help with searching and copying, but it can misread names, numbers and columns. A searchable PDF is not automatically an editable Word document or a document that meets an accessibility standard.
A visible signature image and a watermark add marks to a page. They do not provide certificate signing or secure redaction. Confirm the recipient's requirements before using a visible mark.
Where Osenpa PDF Tools fits
Osenpa PDF Tools is a free Windows x64 option for local merge, split, page organization, compression, image conversion, OCR, visible marks and supported password or metadata operations. Its document-photo correction is Beta and needs visual review. Corrected PDF output goes through automatic OCR using installed language data; corrected PNG output does not add a searchable text layer.
Merge does not preserve source bookmarks, compression is best effort, and removing a password requires the known password. Keep those limits in the decision, even when a basic task works well.
Osenpa publishes this guide and the app. It works with input documents and images and does not directly control your scanner.
What to check when a document must stay local
PDF processing runs on your PC. Install optional OCR language data and document-correction components before working offline; installing them uses the network.
Check the Network & data page for the app’s other network actions. Keep the original and inspect the result, especially for signed, encrypted or unusual PDFs.
Need the app?
Osenpa PDF Tools. Check requirements and download options.