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CSV to KMZ converter, without the upload.

Turn CSV spreadsheets into KMZ. It is converted in your browser, so the file never leaves your device.

Drop CSV files here

or choose from your computer paste with Ctrl V

Ready · other file types work too0 bytes uploaded, ever

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How to convert CSV to KMZ

  1. Add your CSV spreadsheets

    Drop CSV files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.

  2. KMZ is already chosen

    Press Convert. There is nothing else to set. The work happens in this tab.

  3. Download

    Save the KMZ, or download everything as one ZIP if you converted several files.

Why ToAny

  • Private by construction

    The CSV to KMZ converter is part of this page and runs inside your browser. Your spreadsheets are never sent to ToAny or to anyone else.

  • No upload, no queue

    Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.

  • Free, without an account

    No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.

CSV to KMZ: what to expect

CSV carries no formatting, formulas or multiple sheets, and Excel often misreads its dates and encodings. KMZ bundles a map with its icons and images in one file. CSV is at home in moving tabular data between systems; KMZ is the usual choice for KML with its icons and overlay images in one file.

Every format is read into plain GeoJSON features and written out from there, so coordinates, names and properties carry over wherever the target has a place for them. The first row must name a latitude and a longitude column (lat, latitude, lon, lng, longitude and similar); name, elevation and time columns are recognised, and every other column becomes a property. A row with no valid coordinates stops the conversion and is named. Altitude and per-point timestamps are kept; a line with timestamps is written as a Google Earth track that can be played back. The KML is zipped as doc.kml, the name Google Earth expects. Coordinates outside the latitude and longitude range are refused, since the file is probably in a projected coordinate system.

CSV vs KMZ

CSV

CSV spreadsheet

CSV is a table written as text: one row per line, values separated by commas. Every spreadsheet and database can import and export it, but it holds one sheet only and no formatting, formulas or data types.

Opens in Excel, Google Sheets, Numbers, databases and any text editor

CSV converter
KMZ

KMZ map file

A KMZ is a ZIP archive containing a KML file, normally named doc.kml, and the icons and images it uses. Google Earth saves a placemark collection as KMZ so that the pictures travel with it.

Opens in Google Earth, Google My Maps, QGIS and most GIS tools

KMZ converter
CSV compared with KMZ
CSVCSV spreadsheetKMZKMZ map file
Stands forComma-Separated ValuesZipped Keyhole Markup Language
TypePlain-text tableGeographic data (zipped)
CompressionNoneLossless (a ZIP containing KML)
IntroducedThe 1970s, by no single author (described in RFC 4180)The mid-2000s, by Google
Opens inExcel, Google Sheets, Numbers, databases and any text editorGoogle Earth, Google My Maps, QGIS and most GIS tools
Best forMoving tabular data between systemsKML with its icons and overlay images in one file
File extension.csv.kmz

Questions

Are my spreadsheets uploaded anywhere?

No. The CSV to KMZ conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.

Is anything lost when converting CSV to KMZ?

The values are kept. Anything KMZ has no way to express, such as formatting, formulas or nesting, is simplified or left out.

Can I convert several CSV files at once?

Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.

How do I convert CSV to KMZ on Windows, Mac, iPhone or Android?

The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the CSV file, press Convert and save the KMZ. There is nothing to install.

Is there a file size limit?

Yes. Files up to 150 MB are accepted; a larger file is refused with a message. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.