A vocabulary shuffler randomly reorders your word list so you practice terms in an unpredictable sequence. This prevents memorization based on list order and strengthens true recall. By mixing up the order each time, your brain is forced to retrieve each word independently — a technique backed by spaced repetition and cognitive science research. It's especially useful for language learners preparing for exams like TOEFL, IELTS, JLPT, or HSK.

Place one word-definition pair per line. Use any common separator: tab, comma, equals sign (=), colon (:), or Chinese colon (：). For example: hello = 你好 or goodbye, 再见. The tool automatically detects your separator. You can copy directly from Excel, Google Sheets, or most flashcard apps.

Reverse Mode flips the flashcard — you see the definition first and must recall the term. This builds productive recall (active vocabulary), which is harder than recognition. It's ideal for intermediate to advanced learners who want to strengthen speaking and writing skills. Toggle it on/off anytime with the "Reverse" button.

Yes! Your vocabulary list is automatically saved in your browser's local storage. When you return to this page, your words will still be there. You can also export as CSV to back up your list or import it into other apps like Anki, Quizlet, or Memrise. Use the "Export CSV" button to download your list anytime.

Click the checkmark button on any flashcard or in the list view to mark a word as "Mastered." The progress bar tracks your overall mastery. Mastered words remain in the list but are visually dimmed. You can reset all mastered statuses at any time. This helps you focus on words you still need to learn while tracking your progress.

100% free — no account, no sign-up, no ads. All data stays on your device. We don't track, collect, or store any of your vocabulary data on servers. It's a completely client-side tool built for privacy-focused language learners.

In flashcard mode: ← Left Arrow = previous card, → Right Arrow = next card, Spacebar = flip card, M key = toggle mastered status. These shortcuts make rapid practice sessions smooth and efficient — no mouse needed.

Absolutely! This tool is language-agnostic. Whether you're learning Japanese↔English, Spanish↔French, Korean↔Chinese, or any other combination — it works universally. The pronunciation button uses your browser's built-in speech synthesis, which supports many languages depending on your device.