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Reading & Speech Time
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Shows separate estimates using editable rates. Japanese count is non-whitespace Unicode code points; English count is Latin-script words. Mixed-language text gets both independent estimates, not a combined audio measurement. Defaults are assumptions, not measured speaking speeds. Maximum 1 MB UTF-8.
Example: 600 Japanese characters ÷ 300/min = about 2 min
Runs in your browser. No upload.