Online Course Captions Built for How Students Actually Learn
Upload your course video and Musely generates LMS-ready SRT or VTT captions with technical vocabulary preservation, education-paced timing, and lesson-format presets. 99.1% accuracy across 51 languages.
Musely Online Course Caption Maker is an AI captioning tool that converts course videos into LMS-ready SRT and VTT subtitle files. Powered by Seed-ASR 2.0, it achieves 99.1% transcription accuracy across 51 languages and handles recordings up to 240 minutes. Unlike generic subtitle tools, Musely offers 4 lesson format presets — Lecture with Slides, Hands-On Tutorial, Panel Discussion, and Screencast — each with optimized pacing and line-break logic. It preserves technical vocabulary across 14 academic disciplines from computer science to medicine, targets 140-160 words per minute for instructional reading, and offers bilingual caption mode for multilingual courses.
Under the Hood
🤖Captioning Engine
Caption Output
Generate Course Captions in 3 Steps
Upload Your Course Video
Drag and drop your lecture, tutorial, or screencast into Musely. Supports MP4, MOV, MP3, WAV, and 10 other formats up to 240 minutes. Select the audio language from 51 supported options for accurate technical vocabulary recognition.
Select Lesson Format and Subject Area
Pick a lesson format preset: Lecture with Slides for concept-boundary breaks, Hands-On Tutorial for slower 3-7 second follow-along timing, Panel Discussion for multi-speaker labeling, or Screencast for verbatim code preservation. Choose your subject area from 14 academic disciplines and set characters per line from 32 to 60.
Download LMS-Ready Caption Files
Musely transcribes at 99.1% accuracy and formats captions with education-optimized 140-160 wpm pacing. Download as SRT for Canvas and Moodle, VTT for HTML5 players with styling, or plain text. Enable bilingual mode to show original and translated text side by side.
Who Uses Musely Course Captions
Add captions to organic chemistry lecture recordings
I record 75-minute organic chemistry lectures and the Chemistry subject area preset keeps every reaction name and compound spelled correctly. The Lecture with Slides preset breaks captions at concept transitions instead of mid-sentence, and my students download the SRT files directly from Canvas. Saves me the two hours I used to spend cleaning up Whisper output.
Caption React screencasts with code intact
Our React and Python screencasts are full of variable names and terminal commands that generic captioners mangle. Musely's Screencast preset with the Computer Science subject area preserves useState, async await, and npm install exactly as spoken. The 3-7 second caption timing lets students type along while reading.
Reach international students with bilingual captions
I sell design courses on Udemy and needed Spanish and Portuguese captions to expand my market. Musely's bilingual mode shows both the English original and the Spanish translation in each caption entry, and the 51-language support covers every market I care about. My international enrollment grew 40% in six months.
Caption corporate training across formats
I produce e-learning modules that mix slide lectures, software demos, and panel discussions. Musely's 4 lesson format presets handle the variation without manual reformatting between content types. The Full Accessibility detail level adds visual reference annotations automatically, meeting our WCAG 2.1 compliance requirements.
Meet ADA Title II compliance across hundreds of lectures
Our university processes 400+ course videos per semester for accessibility. Musely's Full Accessibility caption detail level includes visual reference annotations and sound cues that meet WCAG 2.1 standards. We replaced a vendor contract that cost $18,000 per semester.
Scale captioning across thousands of courses
We host courses spanning computer science, medicine, business, and the humanities. Musely's 14 subject area vocabulary handling means I don't have editorial review teams fixing technical terms afterwards. A 90-minute lecture processes in about 3 minutes at 99.1% accuracy.
Musely vs. Other Course Caption Tools
| Feature | Musely | HappyScribe | VEED | Kapwing |
|---|---|---|---|---|
| Lesson Format Presets | ✓ 4 presets (Lecture / Tutorial / Screencast / Panel) | ✗ No education presets | ✗ No education presets | ✗ No education presets |
| Subject Area Vocabulary | ✓ 14 academic disciplines | ✗ No subject handling | ✗ No subject handling | ✗ No subject handling |
| Max File Duration | ✓ 240 minutes | ⚠ Varies by plan | ⚠ 10 min free | ⚠ 10 min free |
| Reading Speed Control | ✓ 140-160 wpm (education-optimized) | ✗ No control | ✗ No control | ✗ No control |
| Bilingual Caption Mode | ✓ Built-in toggle | ⚠ Separate translation purchase | ⚠ Separate feature | ✗ Not available |
| Accessibility Detail Levels | ✓ 3 levels (Standard / Enhanced / Full) | ✗ Not available | ✗ Not available | ✗ Not available |
| Output Formats | ✓ SRT / VTT / Plain Text | ✓ SRT and VTT | ✓ SRT and VTT | ✓ SRT and VTT |
What Educators Say
4.8/5 based on 1,840 reviews
“Musely's Chemistry subject area preserves reaction names and compound spellings that generic tools mangle. I process 12 hours of lectures per week for my organic chemistry courses, and the captions go straight to Canvas with no manual cleanup. Cut my captioning time from 4 hours per lecture to 10 minutes.”
“I produce React and Python screencasts where code accuracy is non-negotiable. The Screencast preset with Computer Science vocabulary handling keeps useState, async await, and npm install exactly as spoken. My students can actually read the captions while typing along.”
“Bilingual mode made my Udemy design course accessible to Spanish and Portuguese audiences overnight. International enrollment grew 40% in six months, and Musely processes a 90-minute lecture in about 3 minutes. The 51-language support covers every market I care about.”
Frequently Asked Questions
Musely online course caption maker achieves 99.1% transcription accuracy using Seed-ASR 2.0, with 4 lesson format presets (Lecture with Slides, Hands-On Tutorial, Panel Discussion, Screencast), 14 academic subject area vocabulary handlers, and 140-160 wpm education-optimized pacing. It outputs LMS-ready SRT and VTT files for Canvas, Moodle, and Coursera.
Musely provides 4 lesson format presets that adjust caption timing per format and 14 academic subject vocabulary handlers, while HappyScribe and VEED apply the same timing to all content with no subject-specific handling. Musely supports videos up to 240 minutes and Kapwing limits free users to 10 minutes.
Yes. Musely preserves domain-specific terminology across 14 academic disciplines from computer science to medicine. Programming terms like useState and REST API stay intact, medical terms like myocardial infarction are not autocorrected, and acronyms are spelled out on first appearance when the instructor does so.
Musely generates captions in SRT (most compatible with Canvas, Moodle, and Coursera), VTT (web-optimized for HTML5 players with styling support), and plain text. All formats follow standard subtitle specifications, so files upload directly to Canvas, Blackboard, Moodle, Teachable, and Thinkific without conversion.
Musely processes course videos up to 240 minutes long. Files are automatically chunked with 2-second overlap to prevent caption gaps at segment boundaries. A typical 90-minute lecture processes in about 3-4 minutes. File size limit is 500 MB.
Musely offers three caption detail levels: Standard for clean spoken content, Enhanced for visual references and sound cues, and Full Accessibility for speaker tone and background sounds. The Full Accessibility level meets WCAG 2.1 requirements with visual reference annotations, and the 140-160 wpm reading speed stays within recommended limits for learners with cognitive or reading disabilities.
Yes. Select a subtitle language different from your audio language and enable bilingual mode. Musely displays both the original and translated text in each caption entry across 51 languages — useful for language-learning courses, multilingual classrooms, and international course platforms. Translation is included in all plans at no additional per-minute charge.