Captions Generator
Online AI subtitle generator: upload a video, audio, or SRT file to automatically generate word-aligned subtitles, edit the text, choose a style, and export MP4 or SRT — no registration required.
About Captions Generator
Captions Generator is an online AI subtitle generation tool. After uploading a video, audio, or SRT file, the AI transcribes the speech, aligns the timeline word by word, and generates subtitles; you can review the text, choose a subtitle style, edit any word, then export an MP4 with subtitles or download an SRT file. No account registration is required. According to the official site, only the audio is uploaded for transcription, while the video is processed in the browser. The free version can export 1080p MP4 (with a small watermark) and SRT, VTT, and TXT subtitle files, with videos up to 30 minutes each and unlimited downloads; the Pro version removes the watermark and supports videos up to 90 minutes, exports up to 4K, all subtitle styles, and text animations.
Best for
Best use cases
Quickly generate word-aligned subtitles for short or long videos
Export SRT, VTT, and TXT subtitle files for use on other platforms or players
Translate subtitles into more than 100 languages
Add text titles and other subtitle style effects to videos
Compare before choosing
According to the official comparison page: for free duration, Captions Generator supports videos up to 30 minutes, while CapCut's free version requires videos to be under 20 minutes
According to the official comparison page: for free subtitle files, Captions Generator provides SRT, VTT, and TXT, while CapCut's online AI subtitle tool only provides SRT and TXT
According to the official comparison page: for privacy, Captions Generator only uploads audio for transcription while the video is processed in the browser; CapCut does not
Features
AI-powered automatic subtitles
Upload an MP4, MOV, MKV, MP3, WAV, or SRT file, and the AI transcribes the speech and aligns the timeline word by word to generate subtitles.
Editable subtitle styles
Review and edit any word, choose from 8 subtitle styles, with 15 fonts and any color, and even copy a style from a screenshot.
Multiple export formats
Export an MP4 with subtitles or download SRT, VTT, and TXT subtitle files.
Translation into 100+ languages
Translate your subtitles into more than 100 languages, available even in the free version; Pro can also translate your own subtitle files of any length.
No registration required
Upload, generate subtitles, and download without creating an account.
Pros
- No registration required to use
- Free version can export SRT, VTT, and TXT subtitle files and 1080p MP4
- Supports video, audio, and SRT file input
- Subtitles are aligned word by word and can be edited word by word
- Free version supports translation into 100+ languages
- The official site states that only audio is uploaded for transcription, while the video is processed in the browser
Cons
- MP4 videos exported with the free version carry a small watermark (subtitle files have none)
- Free version supports videos up to 30 minutes each; Pro supports up to 90 minutes
Pricing Plans
Pro
- Everything in Free
- Video with captions up to 90 min per video
- No watermark
- Subtitle files up to 90 min per video
- Up to 4K quality
* Pricing information is for reference only. Please refer to the latest announcement on Captions Generator's official website.