Catch UI truncation, overflow, and internationalization issues before real translations. Test with Text, HTML, JSON, and ICU messages using intelligent pseudo-localization.
Comprehensive pseudo-localization that helps developers identify and fix internationalization issues before they reach production.
Intelligent parsing of ICU MessageFormat with variable resolution, plural rules, and select statements. Preserves syntax while enabling real-time preview.
Real-time detection of text overflow and truncation issues. Adjustable preview widths to simulate different container constraints and identify UI breakpoints.
Handle Text, HTML, JSON, and ICU messages seamlessly. File upload/download, HTML rendering, and JSON value-only processing for comprehensive testing.
Customize accent characters, expansion factors, and BIDI wrapping
Built for developers with modern tooling and workflows
Identify the perfect scenarios for implementing pseudo-localization in your development workflow.
Test responsive layouts and identify text overflow issues across different screen sizes
Ensure UI elements don't break with longer translated text on small screens
Validate JSON and ICU message files before sending to translation services
Include pseudo-localized content in automated testing to catch UI issues early
Start using pseudo-localization today to catch UI issues before they reach your users. Join thousands of developers who trust our tools for professional development workflows.
The classic i18n bug: a string fits in English but overflows when translated into German (which runs 30% longer), or breaks a layout when it contains special characters. You do not find out until a real translation ships. Pseudo-localization catches it early: the tool expands every string by a realistic factor (simulating a longer language) and injects diacritics, so your UI shows exactly the kinds of overflow and breakage a real translation would cause - without waiting for a translator.
Point it at your markup or string list, and it produces a pseudo-locale version where each string is expanded and accented. Render that in your UI and every clipped label, broken button, and unescaped special character becomes visible immediately. It is the fastest way to harden a layout for internationalization before the first real translation exists.
Overflow: labels that clip or push layout when 30% longer. Escaping: special characters that break unescaped markup or templates. Wrapping: text that assumes single-line and breaks on accented, multi-syllable words. Font support: characters outside the Latin range that your font cannot render. All four are visible the moment you render the pseudo-locale, which is the whole point of the technique.