Free tool
Turn any audio into dictation exercises
One upload becomes a full dictation workout: sentence-by-sentence playback, type-what-you-hear, and word-level scoring.
Dictation is one of the most effective listening exercises there is — you cannot fake understanding when you have to write every word. The problem has always been preparation: finding audio with an exact transcript, cutting it into manageable pieces, and checking your answers word by word. That preparation is exactly what ListenSlice automates.
Drop in any audio — a podcast episode, a lecture recording, an exam practice test you own — and it becomes a ready dictation exercise. Each sentence plays in isolation; you type what you hear; the checker diffs your answer against the transcript and shows every miss in color: correct words in green, missed words in amber, mistyped words in rose.
live demo — real audio, real scoring
How it works
01Upload the audio
Any MP3/WAV/M4A you have — lectures, podcasts, practice tests.
02Switch to Dictation mode
The sentence plays hidden; type what you hear and press Enter.
03Drill your misses
Weak sentences auto-save to the review notebook for the next round.
Scoring that diagnoses, not just grades
The word-level diff does more than produce a percentage. It shows you the kind of miss: a word you never heard, a word you misheard as something else, or an extra word you imagined. Sentences scoring under 60% are saved automatically to a review notebook, so your weakest material collects itself for the next session.
For teachers: homework that corrects itself
Assign any class audio as dictation homework. Students load their own copy of the file, work through it sentence by sentence, and arrive at the next lesson with a notebook of exactly which sentences and words they missed — no marking required.
Frequently asked questions
Do I need a transcript for my audio?
No — the AI transcribes it for you, in your browser. The transcript becomes the answer key that your typing is scored against.
How is my typed answer scored?
A word-level diff compares your answer to the transcript, ignoring punctuation and capitalization. You see correct, missed, mistyped, and extra words each marked distinctly, plus an accuracy percentage.
Can I use it without uploading anything?
Yes — the built-in library has 600+ free episodes (VOA news, classic audiobooks, NASA conversations) that are ready to practice with one click and never count against upload quota.
Is it really free?
Dictation mode, scoring, and the review notebook are free (3 uploads per month, 15 minutes per file, unlimited library use). Pro removes the limits and adds speed control and export.
Ready to try it with your own audio?
free to start no sign-up audio never uploaded
related:Split any audio into sentences·Practice listening with your own MP3 files·Practice English with podcasts — transcript included