An Gramadóir
by An Gramadóir
What An Gramadóir is
An Gramadóir is a free, open-source grammar-checking engine for Irish, made by An Gramadóir at Saint Louis University since 2003. Its Perl module separates sentence segmentation, spell checking, part-of-speech tagging, and grammar checking. A command-line interface reads text from standard input and writes errors to standard output, while a web interface lets users check Irish text in a browser. The HTTP API accepts POST requests containing Irish text and returns grammatical errors as a JSON array. Individual requests are capped at 16k bytes, and new developers are asked to request a unique client identifier. Interfaces are described for Emacs and Vim, and a 2014 extension supports LibreOffice. An OpenOffice macro is noted as incompatible with the latest OpenOffice versions. The project also serves as a platform for language-processing tools for languages with limited computational resources. It is released under the GNU General Public License.
Who it suits
It suits people checking Irish text and developers building Irish-language tools. The developers’ pack is intended for creating language packs.
What it does well
- Free under the GNU General Public License
- Irish grammar checking via web interface
- Command-line and API access
- Separate spelling and tagging components
- LibreOffice extension available
What to know first
- Irish is the implemented language
- API requests capped at 16k bytes
- Client identifier requested for developers
- OpenOffice macro no longer works with latest versions
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| An Gramadóir | GNU General Public License · individual API requests capped at 16k bytes | Free |
As cadhan.com lists them, read 12 Oct 2026. The maker's own page has the final word.
Verdict
An Gramadóir offers Irish checking through web, command-line, Perl, and API routes. Its free GPL license and modular interfaces make it useful for both individual checking and language-tool development.
Facts from An Gramadóir's own pages
- API
- The web API accepts HTTP POST requests with Irish text and returns a JSON array of grammatical errors. · github.com, 12 Oct 2026
- API access
- The API documentation asks new developers to request a unique client identifier and says requests without an approved identifier may eventually be blocked. · github.com, 12 Oct 2026
- API limits
- Individual API requests are capped at 16k bytes, and the page says no rate limits are currently applied. · github.com, 12 Oct 2026
- API use
- The API page says the service powers the Gramadóir web interface, An Scéalaí, and command-line clients. · github.com, 12 Oct 2026
- Checker components
- Its Perl module provides separate interfaces for sentence segmentation, spell checking, part-of-speech tagging, and grammar checking. · cadhan.com, 12 Oct 2026
- Command line
- The command-line interface reads text from standard input and writes errors to standard output. · cadhan.com, 12 Oct 2026
- Editor integrations
- The site describes interfaces for Emacs and Vim, and an OpenOffice macro that no longer works with the latest OpenOffice versions. · cadhan.com, 12 Oct 2026
- Founded
- 2003 · cadhan.com, 28 Sept 2026
- Free plan
- Yes · cadhan.com, 21 Sept 2026
- Intended audience
- The download page describes installation for users who want the Irish checker and a developers' pack for developers creating language packs. · cadhan.com, 12 Oct 2026
- Language development
- The project is intended as a platform for developing natural language processing tools for languages with limited computational resources. · cadhan.com, 12 Oct 2026
- LibreOffice integration
- The site says An Gramadóir can be used within LibreOffice through an extension released in 2014. · cadhan.com, 12 Oct 2026
- License
- The engine is released under the GNU General Public License, which the site says permits copying, modifying, or selling it if redistributed versions preserve those freedoms. · cadhan.com, 12 Oct 2026
- Platforms
- The project says it has been tested on Linux, BSD, Sun Solaris, DEC alpha, Mac OS X, and Windows. · cadhan.com, 12 Oct 2026
- Purpose
- An Gramadóir is an open source grammar checking engine, currently implemented for Irish. · cadhan.com, 12 Oct 2026
- Web interface
- The Irish grammar checker can be tried through a web interface. · cadhan.com, 12 Oct 2026
Where An Gramadóir stands on Freedom251
- Grammar checkers#42 of 88