Context that protects names and terms
Add owner notes for people, products, games, places, or specialized vocabulary. Captionate uses that context when refining obvious recognition errors.
AI subtitle generator
Generate accurate subtitles from any conversation.
Upload video or audio and turn it into readable, time-aligned subtitles. Captionate detects the language automatically, refines the transcript with context, and keeps every word editable before you publish.
- No sign-up required
- Automatic language detection
- Word-level timing
Video + audioGenerate subtitles from common media formats.
60+ languagesAutomatic detection across supported languages and variants.
Word-levelEdit text and segment boundaries around timed words.
5 outputsSRT, VTT, ASS, TXT, or a captioned MP4.
Beyond transcription
An automatic subtitle maker built for the cleanup after ASR.
A raw transcript is not a finished subtitle track. Captionate combines recognition, context-aware refinement, readable segmentation, and word timing so the result is ready to review instead of rebuild.
Segments shaped around speech
Speaker changes, punctuation, and language-specific rules turn the transcript into caption units that are easier to read and edit.
Timing you can keep editing
Words remain connected to their timestamps, so text corrections and segment changes stay aligned with the media.
Three steps
From uploaded media to editable subtitles.
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Upload your media
Choose a video or audio file. Add optional context or limit generation to a selected time range.
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Generate and review
Captionate detects the language, creates the timeline, and opens an editable caption version in your project.
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Edit or export
Correct text, split or merge segments, translate, style, and export without recreating the caption track.
Review with control
Keep the speed of AI without giving up the final edit.
The generated version opens in the same editor used for every later step. You can fix a single word, reshape a caption boundary, or create a translation while preserving the original project and timing.
- Edit words directly. Change the caption text while retaining its timed word structure.
- Split and merge segments. Adjust where one subtitle ends and the next begins.
- Search the caption track. Find a phrase and move directly to the matching segment.
- Keep multiple versions. Generated and translated captions remain separate inside the project.
Made for real media
Automatic subtitles for the content you already create.
Creator videos
Create an editable subtitle track, adjust the look, and publish a captioned MP4.
Interviews
Preserve changing speakers and turn long conversations into readable caption segments.
Courses
Use context notes to protect terminology, names, and concepts across a presentation.
Multilingual clips
Detect supported language changes without forcing the full transcript into one language.
Continue the workflow
Take your generated captions further.
FAQ
AI subtitle generator questions.
How do I generate subtitles automatically?
Upload video or audio, optionally add context or a time range, and start generation. Captionate detects the language and creates an editable, time-aligned caption track.
Do I need to select the spoken language?
No. Supported languages are detected automatically, including language changes within multilingual media.
Can I edit AI-generated subtitles?
Yes. Edit individual words, split or merge segments, search the transcript, and adjust styling in the browser.
What media files can I use?
Captionate accepts most common audio and video containers that can be decoded safely. The original media remains attached to the project for preview and export.
Which subtitle formats can I download?
Export SRT, VTT, ASS, or TXT. You can also render the open caption version into an MP4 video.
Can I try it without signing up?
Yes. Guest credits let you test the automatic subtitle maker before creating an account.
Start with your own media
Choose a file
Create your first editable subtitle track.
Try Captionate free with guest credits. No sign-up required.