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Yu Wang

CTO at Flyfish. I build File Viewer, an open-source browser-side preview tool for 206 file extensions.

Osaka, Japan Joined on Jul 13, 2026 https://file-viewer.app

Work

CTO at Flyfish

Yu Wang

Jul 22

The DOCX demo was perfect. The first real contract was awful.

#webdev #javascript #architecture #performance

3 min read

Yu Wang

Jul 14

Self-Hosting a Browser File Viewer Under a Strict CSP: Workers, WASM, and Assets Without Public CDNs

#webdev #javascript #security #opensource

8 min read

Yu Wang

Jul 13

Designing a Browser-Native File Preview Layer for Internal Web Apps

#webdev #opensource #javascript #performance

6 min read

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