Captionate

AI subtitle generator

AI subtitle generator for video and audio with editable timing.

Generate subtitles from video or audio with a free online workflow. Captionate detects supported languages, creates readable timed captions, and keeps every word editable before you publish or export SRT.

Generate subtitles free See how it works
  • Free credits when you sign up
  • Automatic language detection
  • Word-level timing
Generated timed captions open beside a video preview in Captionate
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

A video subtitle generator with editable timing.

A raw transcript is not a finished subtitle track. This automatic subtitle generator combines recognition, context-aware refinement, readable segmentation, and word timing so the result is ready to review instead of rebuild.

01

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.

02

Segments shaped around speech

Speaker changes, punctuation, and language-specific rules turn the transcript into caption units that are easier to read and edit.

03

Timing you can keep editing

Words remain connected to their timestamps, so text corrections and segment changes stay aligned with the media.

Three steps

Generate editable subtitles from video online.

  1. Upload your media

    Choose a video or audio file. Add optional context or limit generation to a selected time range.

  2. Generate and review

    Captionate detects the language, creates the timeline, and opens an editable caption version in your project.

  3. 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

AI captions for interviews, movies, and multilingual conversations.

01

Movies and creator videos

Use a video subtitle generator for movies, episodes, or uploads, then adjust the look and publish a captioned MP4.

02

Interviews

Generate captions for interviews while preserving changing speakers and turning long conversations into readable caption segments.

03

Courses

Use context notes to protect terminology, names, and concepts across a presentation.

04

Multilingual clips

Detect supported language changes without forcing the full transcript into one language.

Continue the workflow

Translate Translate video subtitles with custom instructions

Create a separate translated caption version while preserving timing and context.

 Render Embed styled subtitles directly into your video

Preview the appearance and export an MP4 at the original video resolution.

FAQ

AI subtitle generator questions.

How do I generate subtitles from video or audio?

Upload video or audio, optionally add context or a time range, and start generation. Captionate detects the language and creates an editable, time-aligned subtitle 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.

Can I generate captions from audio as well as video?

Yes. Captionate works as an audio-to-caption generator as well as a video subtitle generator. Upload a supported audio or video file, then review the timed caption track before exporting.

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 for free?

Yes. Sign up to receive free credits and test Captionate's automatic subtitle generation.

Can I generate SRT subtitles from a video?

Yes. Generate and edit the timed caption track online, then download it as an SRT subtitle file or choose VTT, ASS, or TXT.

Does the free AI subtitle generator work for movies and interviews?

Yes. Sign up to receive free credits, then use Captionate for movie dialogue, interviews, conversations, courses, creator videos, and supported multilingual media.

How does an AI subtitle generator with automatic language detection work?

Captionate detects supported languages from the speech instead of requiring one language for the entire upload, then creates a timed caption track for review.

Can a multilingual automatic subtitle generator handle language changes?

Yes. Supported language changes can remain attached to the relevant speech instead of forcing a multilingual conversation into one language.

Are AI captions for interviews and conversations editable?

Yes. Correct individual words, search the transcript, and split or merge segments while the captions remain connected to the interview timing.

Start with your own media

Create your first editable subtitle track.

Sign up to receive free credits and try Captionate.

Choose a file