PDF tool ยท On-device
Merge PDF
without uploading.
Arrange files, choose page ranges, and download one PDF. Your documents remain in this browser.
Files stay local
No upload or CDN call
Documented limits
20 files, 100 MB, 1,000 pages
Workspace
Merge PDF files
Your PDFs stay in this browser. No file bytes or filenames are uploaded to TomSEOTools.
Choose 2 to 20 files, up to 100 MB total and 1,000 pages. Encrypted PDFs are rejected.
Document safety
Know what changes.
- Page dimensions and vector content are preserved
- Encrypted PDFs are rejected
- Digital signatures may be invalidated
- Outlines, attachments, and document-level forms may not survive page copying
- Review the downloaded PDF before relying on it
The local release uses the pinned pdf-lib 1.17.1 package under the MIT License. It makes no CDN request at runtime.
Use it well
Combine PDFs without handing them to another server.
Choose files, confirm their order and page ranges, then save one document. Keep the originals until you have reviewed the result.
01
Add PDF files
02
Set order and pages
03
Merge and review
Common questions
Are documents uploaded?
No. Document bytes and filenames remain in the browser and the tool makes no server request.
What about encrypted files?
Encrypted PDFs are rejected because the local merge engine does not decrypt them.
Will digital signatures remain valid?
Do not assume so. Merging creates a new document and existing digital signatures may become invalid.