What does Halve PDF Pages do?
Halve PDF Pages is a free online tool that can split each page into left and right halves (for scanned book spreads). The PDF result from Halve PDF Pages is a separate copy to inspect before you use it elsewhere. One possible use is two-page book scans separated for a reading workflow.
Halving renders PDF pages and cuts each image into left and right parts. It is planned for book scans that contain two facing pages on one sheet.
The crop splits at the midpoint. It does not detect the gutter or correct an off-center scan.
Review the output order carefully: the current command collects all left halves and then all right halves, which may require a separate organization step for ordinary book reading order. The command cuts every rendered page down the middle.
It gathers left halves before right halves, rather than alternating each pair. A scan of facing pages can therefore need a later ordering step.
Check the center line before splitting. Any text across that line can be cut into separate pieces.
Cut scanned PDF spreads into halves online: steps
Before using Halve PDF Pages, decide what the new copy must contain and where it will be used. Check that the scan's midpoint matches the planned split and note how the new halves should be sequenced. Review the upload area and all values required by the current Halve PDF Pages form.
Choose the source
Check the spine gap on a facing-page scan. For Halve PDF Pages, choose one source from your device. Keep a source copy for another attempt.
Review the form values
The Halve PDF Pages form has no extra task settings. Check the source in the file area.
Run the file task
Use Process Halve PDF Pages after checking the source and form values. Wait for the job to finish. An error means this attempt failed.
Save and check the output
Check crop boundaries and page order, especially if a line of text crosses the middle of a spread. Store the output on your device. Name this copy separately from the original.
Split spreads: uses for Halve PDF Pages
Halve PDF Pages can help with large spread scans divided into smaller views. It can also be used for paired-sheet scans prepared for manual organization. The PDF result from Halve PDF Pages must suit the intended reading or editing step, so keep the source until that check is complete.
- Two-page book scans separated for a reading workflow.
- Large spread scans divided into smaller views.
- Paired-sheet scans prepared for manual organization.
- Non-sensitive page spreads tested before another OCR step.
Formats and limits for Halve PDF Pages
The Halve PDF Pages form accepts PDF sources. Each Halve PDF Pages upload can be up to 300 MB, which equals 300 MiB. The allowed suffixes on the Halve PDF Pages page do not prove that a source has valid content inside it.
| Accepted formats | Maximum file size | Output |
|---|---|---|
| 300 MB per file (300 MiB upload limit) |
The output order is not on its own left-right interleaved for every spread. Pages are rendered at 200 DPI, affecting text selection and editability.
How this tool works
Halve PDF Pages uses ImageMagick and Poppler to handle the source on the server. The Halve PDF Pages request uses your chosen input rather than any local editing project left on your device. Check the PDF contents produced by Halve PDF Pages before treating them as ready for another app or reader.
For Halve PDF Pages, your browser uploads the source to our file-processing server. This is a server task, not local editing.
Files are due for deletion within 1 hour. Cleanup runs during normal service operation. Keep a local download for future use.
Halve PDF Pages questions and answers
If Halve PDF Pages gives an unexpected result, start by checking the source type and the values used in the form. Check the PDF contents from Halve PDF Pages as well as the filename or displayed message. For another result type, compare Halve PDF Pages with the separate tools described in these answers.
What matters when using Halve PDF Pages?
Reorder the halves if the reading sequence needs left-right pairs. View that area at its intended display size. Note any differences that affect your purpose.
Why try Organize PDF?
Organize PDF offers another task beside Halve PDF Pages: reorder pages in a custom sequence. Organize PDF returns PDF. The stated PDF output from Halve PDF Pages matches a listed input type for Organize PDF.
Why try OCR PDF?
OCR PDF offers another task beside Halve PDF Pages: make a scanned PDF searchable using Tesseract OCR. OCR PDF returns PDF. The stated PDF output from Halve PDF Pages matches a listed input type for OCR PDF.
Why try Crop PDF?
Crop PDF offers another task beside Halve PDF Pages: crop PDF page margins using Ghostscript. Crop PDF returns PDF. The stated PDF output from Halve PDF Pages matches a listed input type for Crop PDF.
What if my PDF result does not open?
For a failed Halve PDF Pages result, first confirm that the download completed and that the viewer supports PDF. Try another local viewer for that format.
Record any error message for support. Keep private source material out of the report.
How do I report a problem with Halve PDF Pages?
Contact support with the Halve PDF Pages page name, source format and the error you saw. Mention any relevant form settings you chose. Do not send passwords or private attachments.