CVLA3 Desktop

CEFR-based Vocabulary Level Analyzer Desktop (ver. 3.2)

CVLA3 Desktop is a standalone application for analyzing the CEFR-J vocabulary level of English texts on your computer. Please note that this is a beta version, so you may encounter some errors. Feel free to contact me if you notice anything unusual (kyudai.uchida.lab[at]gmail.com).

Updated 21 August 2026 (ver. 3.2).

A Reading passage / Listening monologue mode selector has been added, matching the web version. The selected mode applies to both Text Mode and File Mode. In Listening monologue mode the regression score is converted with 1.0897 × score + 0.2876 before it is turned into a CEFR-J level (see the notice on the main page).
The AvrFreqRank regression coefficient has been corrected (see the notice on the main page). AvrFreqRank now reads higher than in earlier releases; predicted levels are largely unaffected.
The desktop version has been aligned more precisely with the online version. Earlier releases used slightly different versions of the underlying libraries and language model, so the same text could give slightly different measures in the two versions. Both now return the same values.

How to Use

Download and extract the desktop version from the link on the main page.
Double-click the executable file to launch the application. (The first launch may take about 30 seconds.)
Follow the on-screen instructions to input your text or upload files for analysis. Be sure to specify the output folder before starting the analysis.
Choose the text type with the Mode selector at the top of the window: Reading passage (the default) or Listening monologue. The choice applies to both of the processing modes below.
There are two analysis modes: File Mode (highlighted in red on the screen) allows you to process multiple files at once and outputs a summary of the results. Text Mode outputs the result as an HTML file in the specified folder. You can view the result by double-clicking the generated file.
Line breaks affect the result. Remove line breaks inside a paragraph (text copied from a PDF often has one at the end of every line), keep one line break between paragraphs, and avoid blank lines and double spaces. When you compare several texts, format them all the same way.
This software operates 100% locally. No data is ever sent over the internet.
Please use this software at your own risk. The developer is not responsible for any damages caused by the use of this software.

Download CVLA3 Desktop 3.2 for Windows
Download CVLA3 Desktop 3.2 for MacOS

Version 3.2, released 21 August 2026. Windows 157 MB / macOS 119 MB. Extract the archive first, then run the application from the extracted folder.

Need the previous version? — CVLA3 Desktop 3.0
Version 3.2 changed the AvrFreqRank equation and recalibrated the Listening mode, so it does not reproduce results produced with the earlier release. If you need to reproduce an earlier analysis, version 3.0 (released 6 May 2025) is still available:
CVLA3 Desktop 3.0 for Windows | CVLA3 Desktop 3.0 for MacOS
Version 3.0 has no Listening monologue mode, and its AvrFreqRank values are lower than they should be (see the notice on the main page). There was no desktop release numbered 3.1; the desktop version went from 3.0 straight to 3.2. For new work, please use version 3.2.

Notes for macOS Users

Intel-based Macs are not supported.
The current macOS version of CVLA is built for Apple Silicon (arm64) only and will not run on Intel-based Macs.
On some newer Macs, you may need to remove the quarantine flag.
macOS automatically adds a quarantine flag to applications downloaded from the internet, which may prevent the app from launching. If the app does not start even after clicking "Open Anyway" in Security & Privacy, try running the following command in Terminal:
```
xattr -rd com.apple.quarantine /Applications/CVLA.app
```
After that, try launching the app again from Finder or Terminal.