What is MailMergeOnline?
MailMergeOnline is a private PDF mail merge tool that runs entirely in your browser. It combines a PDF template with an Excel spreadsheet or CSV file and creates one personalized PDF per row. It is made for teams that send batches of documents like offer letters, certificates, invoices, payslips, and KYC forms. You can pick a template, upload your data, edit and bind fields on the page, then generate a zip of finished PDFs in seconds. There is no account, no install, and no upload step, so your files stay on your machine. The product also includes an editable template library and support for existing PDF form fields.
Key features
- Works fully in the browser without uploading files.
- Matches spreadsheet columns to PDF placeholders automatically.
- Lets you drag, restyle, and preview fields.
- Generates one PDF per row as a zip.
- Supports editable templates and existing PDF form fields.
- Keeps sensitive documents local and offline once loaded.
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