NGSL Profiler & Text Tools

Understand text difficulty. Align vocabulary. Make informed decisions.

The NGSL Profiler is a free online text analysis tool developed by Dr. Charles Browne, co-creator of the New General Service List (NGSL). It allows teachers, publishers, and researchers to analyze text difficulty in relation to any of the NGSL word lists and make principled decisions about lexical control.

What the Profiler Does:

  • Analyzes text difficulty in relation to any NGSL word list

  • Calculates lexical coverage at your chosen list and level

  • Identifies out-of-level vocabulary

  • Automatically accounts for 100,000+ proper nouns

  • Allows manual adjustment based on learner knowledge

Simply paste a text, select your word list and level, and run the analysis.

If coverage falls below approximately 90%, the text may require lexical adjustment. Revise strategically and re-profile until the text aligns with your instructional goals.

This provides a clear, research-based benchmark rather than guesswork.

Designed for Real Classroom & Publishing Use:

Many profiling tools were built primarily for research contexts.

The NGSL Profiler was designed for:

  • Classroom teachers

  • Materials writers

  • Curriculum designers

  • Publishers developing graded materials

  • Researchers working with lexical coverage

It combines corpus-based word lists with a practical interface that supports real decision-making.

Included Text Tools:

In addition to the Profiler, the platform includes two AI-supported tools:

Text Generator
Creates short original non-fiction texts in accessible, easy English.

Text Rewriter
Shortens longer texts, reducing overall length and sentence length while preserving core meaning.

Together, these tools support a practical workflow:
Analyze → Adjust → Shorten → Re-check.

For Institutions & Publishing Teams:

The NGSL framework has been used internationally in:

  • Graded reader development

  • Exam preparation alignment

  • Curriculum design

  • Lexical benchmarking research

If your institution or publishing team is interested in lexical framework alignment, word list integration, or controlled vocabulary development, consultancy support is available.

Citation (APA):

Browne, C. (2024). NGSL Profiler [Computer software]. Tokyo, Japan. https://www.ngslprofiler.com

NGSL Profiler landing page:

NGSL Profiler sample output: Coverage for Harry Potter by NGSL 1.2: