Skip to content
Excel spreadsheet (XLSX) format parser written in pure Swift
Branch: master
Clone or download
Latest commit 23cb41f Apr 18, 2019
Type Name Latest commit message Commit time
Failed to load latest commit information.
CoreXLSX.xcodeproj Bump version to 0.5.0, update README/CHANGELOG Apr 18, 2019
Example Fix XML namespaces, bump ZIPFoundation dependency (#55) Apr 11, 2019
Tests Add testSpacePreserve to SharedStrings tests (#57) Apr 17, 2019
.gitignore Add Carthage and support for tvOS and watchOS (#6) Nov 18, 2018
.hound.yml Add dot files: format, lint, hound, editorconfig Feb 19, 2019
.swiftlint.yml Fix root paths in CoreXLSX, fix formatter & linter (#43) Feb 20, 2019
.travis.yml Add testSpacePreserve to SharedStrings tests (#57) Apr 17, 2019 Update Apr 18, 2019
Cartfile.resolved Bump XMLCoder to 0.4.1, update README Apr 16, 2019
Package.resolved Bump XMLCoder to 0.4.1, update README Apr 16, 2019
Package.swift Bump XMLCoder to 0.4.1, update README Apr 16, 2019
Package.xcconfig Cell by row/column filtering API with worksheetCache (#1) Nov 11, 2018
Package@swift-4.2.swift Bump XMLCoder to 0.4.1, update README Apr 16, 2019 Bump version to 0.5.0, update README/CHANGELOG Apr 18, 2019
codecov.yml Add ColumnReference type with new API (#3) Nov 15, 2018


Excel spreadsheet (XLSX) format parser written in pure Swift

CI Status Version License Platform Coverage

CoreXLSX is a library focused on representing the low-level structure of XML-based XLSX spreadsheet format. It allows you to open a spreadsheet archive and maps its XML structure into model types that you can read directly from Swift.


To run the example project, clone the repo, and run pod install from the Example directory first.

Model types in CoreXLSX directly map internal structure of XLSX format with more sensible naming applied to a few attributes. The API is pretty simple:

import CoreXLSX

guard let file = XLSXFile(filepath: "./categories.xlsx") else {
  fatalError("XLSX file corrupted or does not exist")

for path in try file.parseWorksheetPaths() {
  let ws = try file.parseWorksheet(at: path)
  for row in ?? [] {
    for c in row.cells {

This prints every cell from every worksheet in the given XLSX file. Please refer to the Worksheet model for more atttributes you might need to read from a parsed file.

Shared strings

Some cells (usually with strings) have their values shared in a separate model type, which you can get by evaluating try file.parseSharedString(). You can refer to the SharedStrings model for the full list of its properties.

Here's how you can get all shared strings in column "C" for example:

let sharedStrings = try file.parseSharedStrings()
let columnCStrings = ws.cells(atColumns: [ColumnReference("C")!])
  .filter { $0.type == "s" }
  .compactMap { $0.value }
  .compactMap { Int($0) }
  .compactMap { sharedStrings.items[$0].text }


Since version 0.5.0 you can parse style information from the archive with the new parseStyles() function. Please refer to the Styles model for more details. You should also note that not all XLSX files contain style information, so you should be prepared to handle the errors thrown from parseStyles() function in that case.

Here's a short example that fetches a list of fonts used:

let styles = try file.parseStyles()
let fonts = styles.fonts?.items.compactMap { $ }

Reporting compatibility issues

If you stumble upon a file that can't be parsed, please file an issue posting the exact error message. Thanks to use of standard Swift Codable protocol, detailed errors are generated listing a missing attribute, so it can be easily added to the model enabling broader format support. Attaching a file that can't be parsed would also greatly help in diagnosing issues. If these files contain any sensitive data, we suggest obfuscating or generating fake data with same tools that generated original files, assuming the issue can still be reproduced this way.

If the whole file can't be attached, try passing a sufficiently large value (between 10 and 20 usually works well) to errorContextLength argument of XLSXFile initializer. This will bundle the failing XML snippet with the debug description of thrown errors. Please also attach that full debug description if possible when reporting issues.

How does it work?

Since every XLSX file is a zip archive of XML files, CoreXLSX uses XMLCoder library and standard Codable protocols to map XML nodes and atrributes into plain Swift structs. ZIPFoundation is used for in-memory decompression of zip archives. A detailed description is available here.


  • Xcode 10.0 or later
  • Swift 4.2 or later
  • iOS 9.0 / watchOS 2.0 / tvOS 9.0 / macOS 10.11 or later


Swift Package Manager

Swift Package Manager is a tool for managing the distribution of Swift code. It’s integrated with the Swift build system to automate the process of downloading, compiling, and linking dependencies.

Once you have your Swift package set up, adding CoreXLSX as a dependency is as easy as adding it to the dependencies value of your Package.swift.

dependencies: [
  .package(url: "",
           .upToNextMajor(from: "0.5.0"))


CoreXLSX is available through CocoaPods. To install it, simply add pod 'CoreXLSX', '~> 0.5.0' to your Podfile like shown here:

source ''
# Uncomment the next line to define a global platform for your project
# platform :ios, '9.0'
target '<Your Target Name>' do
  pod 'CoreXLSX', '~> 0.5.0'


Carthage is a dependency manager that builds your dependencies and provides you with binary frameworks.

Carthage can be installed with Homebrew using the following command:

$ brew update
$ brew install carthage

Inside of your Cartfile, add GitHub path to CoreXLSX master branch (Carthage support is not available in a stable release yet):

github "MaxDesiatov/CoreXLSX" "master"

Then, run the following command to build the framework:

$ carthage update

Drag the built frameworks (including the subdependencies XMLCoder and ZIPFoundation into your Xcode project.


For development work and for running the tests in Xcode you need to run carthage bootstrap in the root directory of the cloned repository first. Then you can open the CoreXLSX.xcodeproj from the same directory and select the CoreXLSXmacOS scheme. This is the only scheme that has the tests set up, but you can also build any other scheme (e.g. CoreXLSXiOS) to make sure it builds on other platforms.

If you prefer not to work with Xcode, the project fully supports SwiftPM and the usual workflow with swift build and swift test should work, otherwise please report this as a bug.

Code of Conduct

This project adheres to the Contributor Covenant Code of Conduct. By participating, you are expected to uphold this code. Please report unacceptable behavior to


Max Desiatov, Matvii Hodovaniuk


CoreXLSX is available under the Apache 2.0 license. See the LICENSE file for more info.

You can’t perform that action at this time.