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.
Other Tools You May Need
Combine & split documents
Use this section when you’re assembling multiple files into one deliverable or breaking a large document into smaller parts for review and sharing. DOCX Merger explicitly supports uploading multiple Word files, visually arranging their order, and downloading one merged DOCX.
Convert documents to other formats
Use this section when you need shareable, publishable, or web-ready exports from Office files. DOCX to PDF is positioned as preserving headings, fonts, and page breaks, while PPTX to PDF focuses on keeping slide layout (with limitations like transitions/videos not supported in PDF output).
Protect & manage document metadata
Use this section when documents contain sensitive information and you need to control access or remove/edit identifying details. DOCX Password explicitly supports adding a password or removing protection when the password is known, and it warns that passwords cannot be recovered if lost.
Extract slides & automate documents
Use this section when you need to pull out only what matters (specific slides) or generate document variants at scale (mail merge). PPTX Slide Extractor notes that animations aren’t preserved in exported slides, which is helpful for setting expectations in extraction workflows.
Free Online Mail Merge
Free online mail merge is useful when the same document needs to be generated many times with only names, addresses, IDs, or pricing changing between recipients. The core idea is simple: a template holds placeholders, and a data source provides one row (or record) per recipient, producing one finished document per row. In Microsoft Word workflows, the recipient list can be edited and refined so the merge targets only the right people, which helps avoid sending the wrong content to the wrong audience. Rules can also be applied during a merge to show or skip content based on conditions, which is helpful for tiered offers or region-specific clauses. A practical setup step is to normalize column headers and avoid mixed data types (numbers stored as text, inconsistent date formats), since those issues commonly cause messy outputs. If the merge output will be shared externally, it’s worth deciding whether to generate DOCX files for editing or PDF files for distribution, depending on how “final” the documents should be. WizardOfAZ fits teams that want a quick browser-based way to generate many personalized files without maintaining a complex desktop setup.
Mail Merge Character Limit
Mail merge character limit problems usually appear when a field is expected to carry long text—like a multi-paragraph clause, a full job description, or a large product list. In Word-based merges, long strings may behave differently depending on how the data is sourced, formatted, and inserted into fields, so testing with worst-case data early prevents late surprises. Some users specifically report a 255-character limitation in certain mail-merge scenarios, which can show up as truncated output that looks correct in the spreadsheet but cuts off in the merged document. When long content is required, a safer pattern is to break the text into multiple columns (Part1, Part2, Part3) and concatenate them in the template using conditional spacing, keeping each piece within manageable length. Mail merge rules can also help by inserting optional paragraphs only when a field is present, which reduces the need for one oversized “all-in-one” field. If truncation still occurs, consider moving long-form content into an attachment or a separate appendix document and merging only a reference link or short summary into the main file. After generating output, spot-check the longest few records rather than trusting the first record, because character-limit issues often hide until edge cases appear.
Mail Merge Filtered Spreadsheet
Mail merge filtered spreadsheet workflows are about controlling who receives a merged document without editing the original spreadsheet every time. In Word mail merge, the recipient list can be edited so records can be sorted and filtered, helping target only rows that match criteria like region, status, or minimum purchase value. Filtering can be combined with rules to tailor the message, so different recipient groups get different paragraphs, coupon codes, or compliance language in the same run. A clean way to prepare the spreadsheet is to add a dedicated filter column such as Segment, Eligible, or SendFlag, then drive filters from that single field to avoid fragile multi-condition logic. When the data comes from a system export, check for blank rows, merged cells, and inconsistent headers, because those are common reasons filters behave unexpectedly during selection. If several departments reuse the same master list, filtering inside the merge tool keeps the source data stable while allowing each team to run its own subset safely. Before generating bulk output, preview a few filtered records (including borderline cases) to confirm the correct people are included and that fields map to the right placeholders. WizardOfAZ can support this style of workflow by letting the merge run in a browser while the selection logic stays consistent with how mail merge recipients are commonly filtered.
Privacy-first processing
WizardOfAZ tools do not need registrations, no accounts or sign-up required. Totally Free.
- Local only: There are many tools that are only processed on your browser, so nothing is sent to our servers.
- Secure Process: Some Tools still need to be processed in the servers so the Old Wizard processes your files securely on our servers, they are automatically deleted after 1 Hour.