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FileTools360
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CSV to HTML Converter

Turn CSV files into HTML in a couple of clicks. CSV is flat tabular text — one table, no formatting; HTML is the markup language of the web. Content is preserved and the layout is rebuilt for the target format.

Not uploaded to any serverConverted on this deviceGone when you close the tabHow this works

Drop your files here

CSV files (.csv) · up to 100 MB each

or paste files from your clipboard

Ready when you are

Drop a CSV file above and FileTools360 will turn it into HTML — right here on your device, without uploading anything.

⌘K to search converters

How to use it

  1. 1

    Add your CSV files

    Drag them onto the drop area, choose them from your device, or paste them from your clipboard. You can queue several at once. Nothing is sent anywhere — the file stays on this device.

  2. 2

    Adjust the settings if you want to

    The defaults suit most people. Open Advanced to control delimiter and header handling.

  3. 3

    Convert and download

    Press Convert. Everything happens on your own device — nothing is uploaded. Download files one by one, or grab them all as a ZIP.

Privacy, in plain words

Is it safe? Your CSV file is not uploaded anywhere

What “uploaded” normally means. On most online converters, pressing the button copies your file across the internet onto a computer owned by that website. That copy is what the word “upload” means, and it is the part nobody explains.

What happens instead. This site does not do it. There is no server here that receives files, so your CSV file is read, converted and handed back by the browser you are using right now. It never travels — so there is no copy to store, read, leak or hand over.

Check it yourself in ten seconds

Turn off your Wi-Fi after this page has loaded, then convert a file anyway. It still works, because everything needed is already on your device.

The longer explanation of how this works, and the full detail of what is and is not stored on the privacy page.

Why this matters more than it sounds

A spreadsheet is rarely about one person. It is usually about hundreds of them, which is what turns an ordinary file into a reportable data breach. It matters more than it sounds, because of what spreadsheets usually are:

Donor and volunteer databases

people who trusted an organisation, not a converter

Payroll

every colleague's salary, in one file

Customer and member lists

names, emails, phone numbers, addresses

Patient or client records

regulated personal data under HIPAA, GDPR and similar

A file that is never sent cannot be kept, leaked, subpoenaed or used to train anything. That is a property of how this works, not a promise about how carefully it is run.

CSV and HTML explained

CSV is plain text where each line is a row and commas separate the fields. There is no formatting, no formulas, and no second sheet — which is precisely why every system on earth can read it.

HTML is the markup language of the web, describing document structure — headings, paragraphs, lists, links — which browsers then render.

Where CSV files come from
Database exports, analytics tools and data interchange between systems.
Where HTML is used
Web pages, email templates and exports from documentation tools.

CSV vs HTML

The two formats solve different problems, which is why converting between them involves trade-offs rather than a straight upgrade.

CSV compared with HTML
PropertySourceTarget
CompressionNoneNone
Introduced—1993
Browser supportEvery spreadsheet, database and programming language.Every browser.
CSV is stronger at
Readable by every spreadsheet, database and programming language. Plain text, so it diffs and streams well. Tiny files.
HTML is stronger at
Renders in every browser. Semantic structure aids accessibility and search engines. Styleable with CSS.

Why convert CSV to HTML?

People make this switch when they run into the limits of CSV: the data needs formulas, formatting or multiple sheets. HTML is the better fit when publishing on the web or generating documents programmatically.

CSV limitations that prompt the switch
Exactly one table — no sheets, formatting or formulas. No type information, so leading zeros and long numbers get mangled. The 'comma' is not guaranteed; European exports often use semicolons.
What you give up
Layout depends on the renderer and available fonts. Not a fixed-layout format.

What is preserved when converting CSV to HTML?

The content survives; the layout is rebuilt. Text and the order it is read in carry across, but HTML lays the page out again rather than reproducing CSV's exact positioning, so line breaks, page breaks and spacing will differ. Anything that depends on precise placement is worth checking in the result.

CSV has no notion of data types. A product code like 007 becomes 7 unless the importing tool is told otherwise — which is a property of CSV, not a bug in the converter.

About these formats

Source

Comma-Separated Values

Flat tabular text — one table, no formatting.

Extensions
.csv
MIME type
text/csv
Best for
Data imports and exports · Databases · Scripts
Compatibility
Every spreadsheet, database and programming language.

Target

HyperText Markup Language

The markup language of the web.

Extensions
.html, .htm, .xhtml
MIME type
text/html
Best for
Web pages · Email templates · Rich exports
Compatibility
Every browser.

Values are type-sniffed, so numbers and dates land as real numbers and dates rather than text.

Good to know

CSV to HTML Converter — questions

How do I convert CSV to HTML?

Drop your CSV file onto the area above, then press Convert. The HTML file saves straight to your device. You do not need an account, and there is no watermark.

Is it safe to convert CSV files here — are they uploaded to a server?

No, nothing is uploaded. On most online converters, pressing the button copies your file across the internet onto a computer owned by that website; it is converted there and sent back. That copy is what "upload" means, and it is the part that puts your file out of your control. This site does not do it. Your CSV file is read and converted by the browser you are using right now and never leaves this device, so there is no copy for anyone to store, read or hand over. You can prove it: turn off your Wi-Fi after this page loads and the conversion still works.

Can I convert confidential CSV files, like bank statements or contracts?

Yes, and that is the case this site was built for. Because the file never leaves your device, a confidential document is no more exposed than it is sitting in your own folder — there is no transfer, no copy on someone else's hardware, no retention period to read about and no staff with access. Nothing is logged about the file either: not its name, not its size, not its contents. The one thing worth saying plainly is that this protects the file in transit and at rest on our side, not from anything already on your own computer.

What should I know before converting CSV to HTML?

Values are type-sniffed, so numbers and dates land as real numbers and dates rather than text.

What is preserved when converting to HTML?

Text, structure and images carry over faithfully. Exact page layout does not, because HTML lays content out differently from CSV. Check headings, tables and page breaks in the result.

How large a file can I convert?

Up to 100 MB per file for this conversion. Because the work happens in your browser, the practical limit is your device's memory — larger files work on a desktop with plenty of RAM and may fail on an older phone.

Can I convert several files at once?

Yes. Add as many as you like and press Convert All. Each file is processed independently, so one failure does not stop the rest, and you can download everything together as a ZIP.

Can I use this on my phone?

Yes. FileTools360 works in mobile browsers on iOS and Android. Pick the file through your phone's file picker — Files on iOS, or Downloads on Android — including files stored in iCloud or Google Drive.

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Runs entirely in your browser

FileTools360 by the numbers

527 converters and tools65 file formatsnothing ever uploaded.