Excelize
Pure Go library for reading and writing Excel spreadsheets (XLAM/XLSM/XLSX/XLTM/XLTX)
Excelize remains the most capable pure-Go Excel library, now requiring Go 1.25.0+. Its streaming API and broad feature set make it a top pick for server-side spreadsheet generation. Lacks GUI and real-time collaboration, but for backend automation, it's hard to beat.
- Backend developers generating Excel reports in Go
- Data engineers building ETL pipelines that output Excel files
- Automation engineers needing to create or edit spreadsheets server-side
- Enterprise developers integrating Excel processing into Go applications
- Non-developers seeking a GUI spreadsheet editor
- Users needing real-time collaboration features (e.g., Google Sheets)
- Projects requiring support for older Excel binary format (XLS)
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In short
Excelize — Pure Go library for reading and writing Excel spreadsheets (XLAM/XLSM/XLSX/XLTM/XLTX). Best for Backend developers generating Excel reports in Go, Data engineers building ETL pipelines that output Excel files, Automation engineers needing to create or edit spreadsheets server-side. Free to use.
Viability Score
How likely is Excelize to still be operational in 12 months? Based on 4 signals — momentum (how recently it shipped), wrapper dependency, revenue model, and web presence.
Last calculated: July 2026
How we score →Key Features
- Read and write XLAM/XLSM/XLSX/XLTM/XLTX files
- Streaming API for reading/writing large datasets with low memory
- Chart creation and management (bar, line, pie, etc.)
- Cell styling: fonts, colors, borders, alignment, fill
- Formula support with calculation engine
- Data validation and conditional formatting
- Pivot tables and sparklines
- Cell merging, comments, hyperlinks
- Image insertion into worksheets
- Custom number formats and rich text
- Cell protection and worksheet encryption
- Compatibility with Excel 2007+ and LibreOffice
- Cross-platform: macOS, Linux, Windows
- Pure Go, no external dependencies
- Requires Go 1.25.0 or higher
About Excelize
Excelize is an open-source Go library that enables reading and writing Microsoft Excel files (XLAM, XLSM, XLSX, XLTM, XLTX) without any external dependencies. Written entirely in pure Go, it integrates easily into any Go project. The library provides comprehensive APIs for creating, modifying, and parsing spreadsheets, including support for charts, styles, formulas, data validation, and conditional formatting. Designed for developers who need to generate or process Excel files programmatically, Excelize excels at handling large datasets with its streaming API that minimizes memory usage. It supports cross-platform deployments on macOS, Linux, and Windows. Key differentiators include high compatibility with the Office Open XML format, the ability to work with multiple sheet types, and an active open-source community. With regular releases and extensive documentation, Excelize simplifies Excel file manipulation in Go. The library is free and open-source, licensed under BSD-3-Clause, and requires Go 1.25.0 or higher.
Behind the Verdict
Excelize is the go-to choice when you need to generate or parse Excel files in a Go backend. If your project involves large datasets, its streaming API keeps memory usage low. But if you need a graphical editor or real-time multi-user editing, look elsewhere — this is a code library, not an app. Compared to alternatives like tealeg/xlsx, Excelize offers broader feature coverage (charts, formulas, pivot tables) and better performance for large files. A caveat: it now requires Go 1.25.0+, so teams on older Go versions need to upgrade. The library is well-maintained, with a responsive community. For enterprise reporting, data pipelines, or automation scripts in Go, Excelize is the strongest option.
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Use Cases
- Generate monthly sales reports in Excel format from a Go web server
- Parse uploaded XLSX files and import data into a database
- Create styled invoices with charts using streaming writes
- Automate batch processing of multiple Excel workbooks with formulas
- Build a data export tool that produces XLSX with conditional formatting
Limitations
- Excelize is a code library requiring Go programming knowledge; it does not provide a user interface.
- It supports only the Office Open XML formats (XLSX etc.), not the older XLS binary format.
- Performance with extremely large files may require careful use of the streaming API.
- As an open-source project, support relies on community channels and GitHub issues.
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
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