# Excel Writer v.20
**URL:** https://forum.ada-lang.io/t/excel-writer-v-20/4781
**Category:** Releases
**Created:** [September 30, 2026, 7:50pm UTC](https://forum.ada-lang.io/t/excel-writer-v-20/4781 "2026-09-30T19:50:06Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@zertovitch](https://forum.ada-lang.io/u/zertovitch)
#### Post date: [September 30, 2026, 7:50pm UTC](https://forum.ada-lang.io/t/excel-writer-v-20/4781/1 "2026-09-30T19:50:06Z")
**Excel Writer** (Excel\_Out) is a free, standalone, portable, open source package for producing Excel spreadsheets with basic formattings, formulas and page layout.
It can be used in an “Ada.Text\_IO” fashion, with Put, Put\_Line and New\_Line.
It operates independently, without interaction with any Office (MS Office, LibreOffice, …) software. It works even on platforms which don’t support such software.
**Excel Writer** can be found via the following links:
Home page: [https://excel-writer.sourceforge.io/](https://excel-writer.sourceforge.io/)
Sources, site #1: [https://github.com/zertovitch/excel-writer](https://github.com/zertovitch/excel-writer)
Sources, site #2: [https://sourceforge.net/projects/excel-writer/](https://sourceforge.net/projects/excel-writer/)
Alire crate: [Alire - Excel\_writer](https://alire.ada.dev/crates/excel_writer)
What’s new in this version:
- custom colors can be defined via `Define_Palette` method
- the number of custom formats has increased from 62 to 65535 for BIFF3+
Enjoy!
If you like the software, don’t forget to “star” the project on GitHub and/or SourceForge.
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### Author:  [@cantanima](https://forum.ada-lang.io/u/cantanima)
#### Post date: [September 30, 2026, 8:22pm UTC](https://forum.ada-lang.io/t/excel-writer-v-20/4781/2 "2026-09-30T20:22:26Z")
This is a great and useful library!