Skip to main content
VellumPDF

Batch processing

Fifty files, one click, one archive.

Your files never leave your device

Drop your PDFs here

or click to browse your files — a ZIP archive of PDFs is accepted

How to process several PDFs at once, step by step

The “Batch” tool applies the same operation to every file you drop, without opening them one by one, and hands back a ready-to-download archive.

  1. Drop in every file to process

    Drag in as many PDFs as you need: the tool sets no limit on how many.

  2. Pick a single operation

    The grid offers Compress, Watermark, Number, Rotate, Protect or Flatten. Only one operation is applied to every file in the batch, in one pass.

  3. Set that operation’s options

    Depending on the choice: text and opacity for a watermark, an angle for rotation, level Balanced or Maximum for compression, or a password and its confirmation for encryption — two separate fields, never one.

  4. Start processing

    Click “Process N documents”. Each file is handled one after another with a progress bar; a failed file is set aside and named without blocking the rest.

  5. Download the archive

    The result arrives as a ZIP, even for a single file. If no file could be processed, no archive is produced and the list of failures is shown instead.

Batch compression always rasterizes every page into an image: it does not offer the lossless “Light” level found in the standalone Compress tool.

Frequently asked questions

How do I apply the same operation to several PDFs at once?

Drop in your documents and pick an operation — compression, watermark, page numbering, rotation, password protection or flattening — applied to all of them at once. The result is delivered as a single downloadable archive.

How many files can this tool process in one go?

There is no fixed cap: even with dozens of files, processing stays local, in your browser, with no server queue.

Is batch processing free and does it avoid uploading my documents?

Yes, each document is processed on your own device, with nothing sent to a server, free of charge and with no limit on the number of files.

Which operations can be applied in batch?

Six: compress, add a watermark, number the pages, rotate, protect with a password and flatten forms. The setting you choose applies to every file in the list, with the same password or the same watermark text throughout.

How do I tell the processed files apart in the archive?

Each file comes out under its original name with a prefix saying what was done to it — “protege”, “aplati”, and so on. Your source files are untouched: the batch produces copies.

What happens if one file in the batch fails?

It is reported as a failure, by name, instead of being filed among the successes. That is deliberate: an encrypted or malformed document that came out unchanged inside the archive would go unnoticed, and you would archive an unprocessed file believing otherwise.