Chang Yanwei Office Knowledge is an independent streamlined online tools site, part of a personal easy-office tool series. It is not affiliated with Microsoft in any way. It includes 39 general tools plus VBA, M, and DAX professional sections. VBA, Excel, Power BI, DAX, and M are registered trademarks of Microsoft. All processing happens in your browser — no data is uploaded to any server.
✅ No upload: all processing happens in your browser, zero requests
✅ No signup: no account, no cookies, just open and use
✅ No nag: no popups, no ads, no QR codes, no cookie banners
✅ More than tools: VBA / M / DAX sections offer a systematic transition path
Who uses Chang Yanwei Office Knowledge
General office / dev / data analysis
Anyone who needs JSON formatting, hash, Base64, URL encoding, character counting in their daily work
VBA upgraders
Developers transitioning from Excel VBA to the modern data stack, who need M / DAX learning paths
Power BI beginners
Data analysts new to Power BI who need VBA → DAX conversion, DAX formatter, error checker
Key audience: VBA upgraders + data analytics beginners (VBA / M / DAX sections are the core)