CSV to XLSX API

Convert CSV Files into Excel XLSX Spreadsheets instantly with high fidelity.

Fast Setup

Cloudmersive APIs can be implemented into your project in two quick and easy steps.

Instant Results

Conversions are performed on cutting edge Cloud servers to give you real time results.

Global Presence

With servers strategically positioned across the world, Cloudmersive services remain responsive no matter where you are.

Cloudmersive APIs power over 1,000 of the world's smartest businesses, including:

Try it

Upload a CSV File to convert it to an XLSX.

800 free API calls/month, with no expiration

Get started now! or

Complete CSV API

Convert CSV to XLSX and other formats
Validate CSV files to ensure file integrity
Convert other formats into CSV

High-Fidelity CSV to XLSX

Great Documentation and Client Libraries

C#, Java, Node.JS, Python, PHP, .NET Core, Ruby, Objective-C client libraries available.
Full documentation
Swagger/OpenAPI specifications

Interactive Docs Read Docs and Examples .NET Java Node.JS Python PHP Ruby Objective-C Drupal

Satisfied Customers

"Cloudmersive has become our strategic partner in full life cycle document processing, from create and capture, to OCR, to virus and sensitive content scanning, to report generation. This has really taken our business results to the next level, reducing costs and streamlining our systems. We have also really appreciated top-notch support."

-J. Li, Pyriform Group

Compare Prices

Flexible Deployment

Use Cloudmersive APIs from the cloud, or deploy Cloudmersive APIs to the edge, a private cloud, your on-premise data center, or a custom public cloud instance when needed to enable key scenarios for latency, compliance, security and control.

Public Cloud Leverage multi-tenant public cloud