UD5 Toolkit
i18n Missing Key Finder - Online Compare Language Files
Paste the reference language JSON and a target language JSON. See which keys are missing or extra. Translate with confidence.
Tag: Internationalization (i18n) Utilities
5+ toolsPseudo‑Localization Generator - Online Test UI for i18n
Transform English text into pseudolocalized text with accents, expansion, and brackets. Test your UI's readiness for translation.
Intl API Explorer - Online Format Numbers, Dates, Lists
Explore all Intl APIs: NumberFormat, DateTimeFormat, RelativeTimeFormat, ListFormat. See outputs for any locale. Powerful i18n.
i18n JSON to CSV Converter - Online Flatten Translation Files
Convert nested JSON translation files into a flat CSV table for translators. Also reverse back. Local only.
Accept‑Language Header Visualizer - Online Locale Match
Paste your Accept‑Language header and see which languages your site should serve based on quality values. Internationalization helper.