Auto Captioner

Auto Captioner generates AI subtitles for uploaded videos in 20+ languages, offers an editor for text and timing, 25+ style presets, and exports burned-in video or SRT, VTT and TXT files. A free tier is watermarked and capped at one minute.

Auto Captioner is a web-based subtitle generator that turns the speech in a video into timed captions, then lets the user restyle them and export the result. The workflow is short: upload a clip, let the AI transcribe the audio, correct any words or timing in the built-in editor, and download either a video with the captions burned in or a text file in SRT, VTT or TXT format. The service is aimed at people who publish video regularly and need captions without learning editing software. The homepage names YouTube creators, short-form producers for TikTok and Reels, educators and coaches, freelancers and agencies, social media managers and podcasters who want captioned clips from audio. Transcription is described as handling accents, background noise and several speakers, and it covers more than 20 languages with automatic language detection. Common video formats such as MP4, MOV and WebM are accepted in landscape, portrait or square ratios. In practice, the original video is processed locally in the browser, and only the extracted audio goes to the transcription provider when AI captions are requested. Styling comes from more than 25 presets, including animated looks suited to trending short-form formats, or from a fully custom design. Paid plans add saved reusable styles, uploaded fonts and AI subtitle translation. The free tier is real but constrained: videos up to one minute, a simple caption style, 720p export and a small watermark. Pro raises the length limit to 30 minutes and removes the watermark, while Max extends it to one hour. Compared with full video editors that include captioning as one feature, Auto Captioner is narrower and faster to learn. Compared with transcript-only tools, it adds visual styling and burned-in export. Users with long recordings, heavy editing needs or offline requirements will find its scope limited, since the product concentrates on captions rather than broader video production.