XLS to XLSX using PHP

The PHP SDK for converting one Excel document to another Excel document format.

The PHP library for converting XLS file to XLSX file.

Try for FREE

File conversion library for PHP

ConvertAPI provides a PHP library that allows you to perform a XLS to XLSX conversion with just a few lines of code. Convert XLS to XLSX documents using PHP programming language with no effort at all!

        Execute the following command in your project root:
    
composer require convertapi/convertapi-php

Or install it manually using ConvertApi autoloader:

Following extensions are required: curl & json

require_once('/path/to/convertapi-php/lib/ConvertApi/autoload.php');

Composer GitHub

How To Convert XLS to XLSX using PHP?

You can convert XLS to XLSX in a few simple steps:

Obtain your secret key by signing up for a free account.
Install the ConvertAPI library for PHP
Set up the XLS to XLSX conversion using our live demo tool
Copy-paste the auto-generated code snippet into your project!

XLS to XLSX - complete code snippet for PHP

Once you have your authentication in place, simply copy-paste this xls to xlsx conversion code snippet into your PHP project:

// Code snippet is using the ConvertAPI JavaScript Client: https://github.com/ConvertAPI/convertapi-js

// Code snippet is using the ConvertAPI Node.js Client: https://github.com/ConvertAPI/convertapi-nodejs

// Code snippet is using the ConvertAPI PHP Client: https://github.com/ConvertAPI/convertapi-php

// Code snippet is using the ConvertAPI Java Client: https://github.com/ConvertAPI/convertapi-java

// Code snippet is using the ConvertAPI C# Client: https://github.com/ConvertAPI/convertapi-dotnet

# Code snippet is using the ConvertAPI Ruby Client: https://github.com/ConvertAPI/convertapi-ruby

# Code snippet is using the ConvertAPI Python Client: https://github.com/ConvertAPI/convertapi-python

// Code snippet is using the ConvertAPI Go Client: https://github.com/ConvertAPI/convertapi-go

REM Code snippet is using the command line utility program: https://github.com/ConvertAPI/convertapi-cli

Upload the file and see how it works

You can set up the advanced conversion parameters and test the conversion result online using our interactive demo tool. It will auto-generate the code snippet for you!

Advanced XLS to XLSX conversion parameters

Password String

Sets the password to open protected documents.