Mail-merge DOCX filler
Upload a template and a CSV/JSON data file, preview the first merge, and download personalised documents in seconds.
- 1Upload template
- 2Preview merge & download
Mail-merge tips
Ensure placeholder names ({{name}}, {{company}}) match the column headers in your CSV or keys in your JSON.
Need bulk output?
Large data files generate a ZIP. Preview uses the first record so you can spot mistakes quickly.
Privacy-first processing every time
WizardOfAZ tools do not need registrations, no accounts or sign-up required. Totally Free.
- Local only: There are many tools like Text tools, some CSV tools, List tools etc. that are only processed on your browser. Data and Documents are transformed on your machine, so nothing is sent to our servers.
- Transparent progress: Watch the processing banner appear as soon as work begins and know exactly when it completes.
- Clear safeguards: Every tool links directly to our privacy policy and has been reviewed for accessibility.
- Secure Process: Some Tools need to be processed in the servers so the Old Wizard processes your files securely on our servers, keeping them for up to 1 hour so your tool can finish its work—after that, they are automatically deleted after 1 Hour.
“The wizard does everything I need. I can merge sensitive PDFs without a second thought.”
— Morgan, legal operations lead
What is Mail Merge Filler?
Mail Merge Filler is a free document assistant from WizardOfAZ. Use it to merge office files into a single download as part of your office automation, without installing extra software.
Popular ways to use Mail Merge Filler
- Streamline office automation by using Mail Merge Filler to merge office files into a single download.
- Share deliverables faster—processed office files are ready for download in seconds.
- Combine Mail Merge Filler with other WizardOfAZ tools to keep complex workflows in one browser tab.
Examples and workflow tips
- Upload a sample file, cast the spell to merge office files into a single download, and download the processed result instantly.
- Bookmark the Mail Merge Filler in your browser so recurring tasks stay only one click away.
- Share the spell with teammates who need a quick, no-install way to merge office files into a single download.
Frequently asked questions
Is the Mail Merge Filler secure?
Yes. The Mail Merge Filler runs entirely in your browser, which means your documents never leave your device.
What can I do with the Mail Merge Filler?
You can office automation by processing office files without uploading them to an external service.
Can I use Mail Merge Filler on mobile?
Yes. WizardOfAZ tools are responsive, so you can launch the spell on desktops, tablets, or phones without installing extra apps.
Related tools to explore
Expand your toolkit with other WizardOfAZ spells that complement Mail Merge Filler:
- DOCX Merger — Use it to merge office files into a single download.
- DOCX Metadata Editor — Use it to edit office files without extra software.
- DOCX Password — Use it to work with passwords using flexible options.