Boox Note Optimizer

Export Visuals

Optimization Results

Waiting for file...

Advanced Settings

Adjust these parameters only if the default optimization is causing visible artifacts or retaining too much file size.

Spatial Threshold 0.50 px

Pressure Equivalence 100 lvl

Tilt Equivalence 20 units

Report an Issue with Your .note File

GitHub Source

Select a .note file

Tap or click to browse locally.

Obtaining your files:

From the native Notes app, long-press a notebook, tap Share and Export → Export to local (.note).

💡 Pro Tip You can open this page on Chrome directly on your Boox device and select the files straight from internal storage (`Storage/note/`). No need to transfer files.

Optimization Complete

Your note has been successfully optimized in memory.

Experimental Visualizer ⚠️

Beta Preview functionality

The preview functionality is approximate, only tested with files with latest firmware on Boox Note Air 5c (as of 2026/02/18) and not fully matching the end result in Boox. It should only be used comparatively to spot major artifacts from the effect of the optimization.

Figma Architecture: Scroll to zoom • Drag to pan

Pg 1/1

ORIGINAL

OPTIMIZED

Stroke Optimization

To keep writing lag-free, Boox tablets record far more pen data than actually needed. While this is great for responsiveness, it results in unnecessarily large files filled with redundant points—like saving hundreds of overlapping dots just to draw a simple straight line.

Instead of blindly smoothing out your lines and altering your handwriting, this app safely cleans up the extra data. It analyzes the exact position, pressure, and tilt of your strokes, and removes a point only if the change is completely invisible to the human eye.

This results in a drastically smaller file sizes with zero loss in visual quality.

License & Legal

Not Affiliated

This application is an independent community-driven project. It is not affiliated with, endorsed by, sponsored by, or connected to Onyx International Inc. or the BOOX brand in any way.

MIT License

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY...

⚠️ Data Safety Recommendation Always ensure you maintain backups of your original .note files before deleting them or replacing them on your device.