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PlaidCloud

Merge Multiple PDFs

Joins the PDFs in a folder into a single PDF. Unlike Concatenate files, this step understands the PDF format and produces a valid merged document.

Inputs

Section titled “Inputs”
  • Input Directory — the folder whose PDFs are merged, in a document account. A single archive, such as a ZIP of PDFs, can be given instead, and the PDFs inside it are merged.
  • Output Merged File — where the merged PDF is written.

How It Works

Section titled “How It Works”
  • The PDFs are merged in order of their path, with numbers taken by value — page2.pdf comes before page10.pdf — so number them to control the order. Each keeps its own pages in order.
  • Only files named .pdf are merged. Anything else in the folder is left out, and an archive in the folder is not opened.
  • Files in subfolders are included where the document account lists them: S3, Wasabi and Google Cloud Storage accounts list the whole folder tree, while OneDrive, SFTP and Azure accounts list the top level only.
  • At most 100 PDFs are merged; more fails the step.

Output

Section titled “Output”

A single PDF at the output path, holding every page of every merged PDF.

Notes

Section titled “Notes”
  • A folder with no PDFs in it fails the step, naming the folder.
  • The output path cannot be the input path.

Common Uses

Section titled “Common Uses”
  • Assembling monthly reports from individual report PDFs
  • Combining a cover sheet, body, and appendices into a single deliverable
  • Bundling generated invoices into a per-customer or per-period archive
Section titled “Related”