Output
—
Text and files are transformed locally with browser APIs; this tool performs no upload.
Encode UTF-8 text and files, decode Base64 and switch URL-safe mode locally.
—
Text and files are transformed locally with browser APIs; this tool performs no upload.
The interactive logic is isolated from the static page shell. Useful content arrives first, then only the tool interface that needs JavaScript becomes interactive.
Focus states, semantic labels, reduced-motion support and responsive layouts are part of the base interface rather than optional polish.