Add Bates numbers to a PDF online

Stamp sequential Bates numbers on every page of your PDFs, right in your browser. No software to install, and your documents are never uploaded — they stay on your device the whole time.

How it works

1. 1. Add your PDFs

   Drop in one or more PDFs. They open in your browser — nothing is uploaded to a server.

2. 2. Set prefix and starting number

   Choose a prefix like SMITH- and a start number. The label preview updates as you type, e.g. SMITH-000001.

3. 3. Stamp

   Every page gets a sequential Bates number, continuing across files in the order you list them.

4. 4. Download

   Download the stamped PDFs, ready for production or filing.

What is Bates numbering?

Bates numbering gives every page in a set of documents a unique, sequential identifier — usually a prefix plus a zero-padded number, like ABC-000001. Law firms use it in discovery and court filings so any page can be referenced and tracked exactly.

Why not upload to a free PDF site?

Most online PDF tools send your file to their servers. For privileged or confidential material that is a real risk. OmniBates does all stamping in your browser, so the documents never leave your computer.

What does it cost?

You can stamp a sample, or up to 3 of your own documents (25 pages), without an account. The Free plan is $0 forever for 25 documents or 250 pages, with no credit card. Paid plans cover larger productions and also handle Word, Excel, images and Outlook emails.