How Kalyvor keeps your files private
Encryption in transit, immediate deletion and what browser-side processing actually means.
4 min read
Productivity toolsFree
Mail Merge
Fill a template with `{{field}}` placeholders against CSV data — one merged document per row.
- instantaverage
- In-browserprocessing
- Zerouploads
- Runs in your browser
- Nothing is uploaded
- No signup required
Productivity tools
Mail Merge
Template
Paste CSV or spreadsheet rows — the first row is treated as column headers.
Preview
Write a template first — use {{field}} for anything that changes.
Mail Merge runs entirely in your browser — nothing is uploaded, nothing is saved.
People also use
Tools that pair well with this one, or do the job from the other direction.
Why Kalyvor
Built for people who value their time
Every productivity tool is fast, private and genuinely free — no dark patterns, no surprises.
Fast cloud processing
Jobs run on dedicated workers and finish in seconds — no queue, no spinner you can go make coffee to.
Auto file deletion
Everything you upload is erased the moment the job finishes. Nothing is written to long-term storage, so there is no retention period to wait out.
Works everywhere
Desktop, tablet or phone, any modern browser. Nothing to install, no plugins, no extensions.
Batch processing
Drop in a folder's worth of files and run the whole set through one tool in a single pass.
Privacy first
Encrypted in transit, never used to train models, never sold. Many tools never send the file at all.
No installation
Open a tab and go. No account needed to start, no download, no licence key to hunt for.
How it works
Mail Merge in three steps
No account, no installation, no manual. It takes about as long to do as it does to read.
- 01
Write your template
Use {{field}} placeholders for anything that changes.
- 02
Add your data
Paste CSV or spreadsheet rows — header row first.
- 03
Read the merged documents
One per row, updated instantly — step through them or download all.
Questions
Frequently asked questions
Everything worth knowing before you run your first Mail Merge job. Still stuck? Talk to support.
Helpful articles
Guides and walkthroughs for getting more out of Mail Merge.
Batch processing: run 100 files at once
A practical walkthrough of queueing large jobs without babysitting the tab.
6 min read
Choosing the right tool for the job
A short decision guide for when two tools look like they do the same thing.
5 min read
Getting started with Kalyvor
From first upload to finished download in under a minute — the whole flow.
3 min read
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- instant average
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