Free tool
Practice listening with your own MP3 files
The audio you already have — courses, downloads, recordings — is your best study material. Make it drillable.
Most listening-practice sites lock you into their content: their topics, their accents, their difficulty. But the audio that actually matters to you is sitting in your downloads folder — the exam practice files you bought, the course recordings from class, the podcast episodes at exactly your level. ListenSlice works with your files instead of replacing them.
Because the AI runs in your browser, using your own material is genuinely private: a recording of your seminar, a copyrighted practice test you own, an audiobook you purchased — none of it is uploaded anywhere. The file is transcribed and sliced on your device, practiced on your device, and stays on your device.
live demo — real audio, real scoring
How it works
01Drop in the MP3
Or WAV/M4A/AAC — up to 100MB per file.
02Listen through and flag
Play straight through; mark sentences you did not catch with one key.
03Drill only the flags
Dictate the flagged sentences until each clears at 90%+.
Why sentence-level practice beats passive relistening
Playing a file on repeat trains familiarity, not comprehension. Working sentence by sentence — listen, type or shadow, check, repeat until clean — forces your ear to resolve every word. Learners typically find 5 to 10 genuinely hard sentences in a 10-minute file; ListenSlice lets you flag exactly those and drill only them.
Resume where you left off
Files you have practiced stay in your local history with per-sentence best scores and your last position. Reopening a file is instant — no re-transcription — so a long recording can become a week of short daily sessions.
Frequently asked questions
Can I legally use copyrighted audio I bought?
Practicing privately with material you own is personal use. Because ListenSlice never uploads or redistributes your file — everything runs locally — your copy stays your copy.
What happens to my file after I close the tab?
Practice progress and (for files under 60MB) the audio itself are stored in your browser’s local storage so you can resume instantly. Nothing is sent to a server; clearing site data removes everything.
My MP3 is over the free 15-minute limit — options?
Split it into parts with any audio tool, practice a 15-minute section at a time, or upgrade to Pro for unlimited duration.
Does it work with non-English audio?
The transcription model is optimized for English, which is what the practice experience is designed around. Other languages may transcribe partially but are not officially supported.
Ready to try it with your own audio?
free to start no sign-up audio never uploaded
related:Turn any audio into dictation exercises·Practice English with podcasts — transcript included·Split any audio into sentences