Editorial policy
How content here is sourced, checked, and corrected, and where AI tools are used.
Last updated：2026-10-24
Sources
All guides and explanations on this site are written by the author. Nothing is republished, rewritten from other articles, or scraped. Format specifications are referenced against ISO/IEC 23008-12 (HEIF) and public browser documentation. Measured data is produced in-house, with samples and parameters published on the relevant page.
Fact-checking
Anything involving numbers, compatibility, or step-by-step instructions is verified on real devices and browsers before publishing. Unverifiable claims are not presented as conclusions. External references are cited.
Corrections
Report errors to admin@xunidd.com. Confirmed errors are corrected in the article itself and the last-updated date is bumped. Corrections that change a conclusion are described in the text rather than silently edited.
Use of AI tools
AI tools assist with drafting and translation, but every technical conclusion, measurement, and instruction is reviewed by a human. AI does not perform measurements and is not treated as a source of fact. If something here does not match your own experience, trust your testing and let us know.