How to use it
- Choose Merge or Split.
- Select PDFs locally; for Split, enter page numbers and ranges.
- Review the page count and download the new PDF.
Media & Files · Local-first · Beta
PDF Merge & Split
Merge local PDFs or select pages for a local split output with file and page safety limits.
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Trust record
Check the method before you rely on the result
- Method
- Decode PDFs with pdf-lib locally, enforce file/page limits and copy only selected pages to a new document.
- Merged PDF = ordered page copies; split PDF = selected page copies
- Effective period
- Formula-based; no statutory effective period
- Last verified
- 10 August 2026
- Review every 365 days
- Reviewer status
- Product and domain review: specialist approval not required
- Privacy
- Selected files are processed locally in this browser. Files and their contents are not uploaded, stored, put in URLs or sent to analytics.
Important limitations
- Encrypted, malformed or unsupported PDFs are rejected.
- The output is not digitally signed and does not preserve every metadata field.
Browse Media & Files · Methodology · Sources
A quick guide
Use the number with context
The answer is only useful when you know what it includes and what it leaves out.
Formula
Merged PDF = ordered page copies; split PDF = selected page copies
The new file is a local copy and should be opened and checked before sending.
Make it concrete
Worked example
Pages 1 and 3-4 become a three-page local PDF output.
Boundaries
What this tool does not assume
Limitations
- Encrypted, malformed or unsupported PDFs are rejected.
- The output is not digitally signed and does not preserve every metadata field.
Edge cases
- Invalid, encrypted and oversized inputs are reported without upload.
- Page ranges are deduplicated and sorted.
Last reviewed 10 August 2026 · Formula version 1.0
Method & sources
How this result is grounded
The formula is deterministic and runs in your browser. Read the reference below for the method used by this tool.
- Sharing and file utilities methodology v1
KarobarKit controlled methodology · authoritative reference · Checked 10 August 2026
Supports: payload escaping · file limits · safe decoded-content handling · local-only boundary
Questions
Frequently asked
Does this upload my PDFs?
No. Processing is browser-local and files are released after the operation.
Keep going
Related tools
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Source register checked 10 August 2026.