How Kalyvor keeps your files private
Encryption in transit, immediate deletion and what browser-side processing actually means.
4 min read
Text editingFree
Add Line Numbers
Number every line of a passage so you can point someone at line 47 and be understood — instantly, entirely in your browser.
- instantaverage
- In-browserprocessing
- Zerouploads
- Runs in your browser
- Nothing is uploaded
- No signup required
Text editing
Add Line Numbers
Input
Output
Your numbered text appears here.
Ln 1, Col 1
Waiting for input
Paste, upload or type to begin.
Shortcuts⇧⌘CCopy output⌘LClear input
People also use
Tools that pair well with this one, or do the job from the other direction.
Sort Text Lines
FreeSort lines alphabetically, numerically or by length, ascending or descending.
Remove Duplicate Lines
FreeStrip repeated lines from a list, with or without regard to case and surrounding spaces.
Find and Replace
FreeReplace every match across a whole document, with a preview before you commit.
Why Kalyvor
Built for people who value their time
Every text editing 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
Add Line Numbers in three steps
No account, no installation, no manual. It takes about as long to do as it does to read.
- 01
Paste your text
Code, a passage, a log — anything you'll want to point someone at by line number.
- 02
Pick a separator
A period, a colon, or a tab between the number and the line — pad the numbers with zeros if you like.
- 03
Copy the numbered result
Every line is numbered in order, blank lines included.
Questions
Frequently asked questions
Everything worth knowing before you run your first Add Line Numbers job. Still stuck? Talk to support.
Helpful articles
Guides and walkthroughs for getting more out of Add Line Numbers.
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Getting started with Kalyvor
From first upload to finished download in under a minute — the whole flow.
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