Autosubbed burns AI subtitles into MP4 and MOV videos using Whisper in 50+ languages. Free trial, paid plans from $5/month. Features, pricing and verdict.
Researched and fact-checked by Bartu Cavusoglu · Updated October 26, 2026
Autosubbed is an online tool that adds burned-in, or hardcoded, subtitles to video files. A user uploads an MP4 or MOV file, the service transcribes the speech with OpenAI Whisper, and it returns a new video with the captions rendered into the picture. No editing software or separate subtitle track is involved, and all the work runs in the cloud.
The product is built by TentaDev, and its About page describes it as available since 2025. It targets creators, educators, marketers and business teams who need captioned video for social feeds, lessons or internal content without learning a timeline editor. Its scope is narrow by design: transcribe, style, burn and download.
The pipeline has three stages. First, the audio track is extracted and sent to OpenAI Whisper, which returns a timestamped transcript. Second, the transcript is converted into an SRT file, with each line kept short enough to be readable without covering much of the frame. Third, FFmpeg renders the subtitles onto the video frames using libass, producing a single output file.
Jobs run asynchronously on a FastAPI backend with Celery workers, so long videos do not block the interface and users can close the tab and return later. The site says a typical 10-minute video is ready in under 60 seconds and that longer videos scale proportionally. Files are held temporarily in Cloudflare R2 and deleted automatically after processing.
Transcription relies on OpenAI Whisper, with support for more than 50 languages and automatic detection of the spoken language. The site also says multilingual clips, where speakers switch languages, are handled. For clear single-language recordings it cites accuracy above 95%, and notes that noise, heavy accents and overlapping speakers reduce results.
Styling is set before processing: font family, weight, size, text color and position. The chosen look is burned permanently into every frame. Paid plans can download both the captioned video and the raw SRT file, which is useful for manual corrections, a second burn, or separate caption uploads to YouTube or a CMS. Pro and Business plans add priority processing.
Autosubbed is an online tool that transcribes video with OpenAI Whisper and burns styled subtitles permanently into the file. Users upload an MP4 or MOV and download a captioned video. It runs entirely in the cloud.
Paid plans are Starter at $5 per month for 60 minutes, Pro at $9 per month for 200 minutes, and Business at $18 per month for 600 minutes. There is also a free Trial. The site mentions annual billing with 2 months free, but annual prices are not shown.
Yes. Every new account can process one free video without a credit card. The pricing table lists a 7-minute limit, while the FAQ mentions 2 minutes, so check the current limit at signup. Trial accounts cannot download the SRT file, and the pricing table lists no download for the trial.
It accepts MP4 and MOV files up to 500 MB per upload. It supports over 50 languages through OpenAI Whisper, including English, Spanish, French, German, Japanese, Korean, Mandarin Chinese, Arabic and Hindi, and it detects the language automatically.
The FAQ says accuracy consistently exceeds 95% for clear single-language recordings. Background noise, heavy accents and overlapping speakers reduce accuracy. Paid users can download the SRT to review and edit before burning again.
Yes. Before processing, users can choose font family, adjust weight and size, set text color and configure positioning. The chosen style is burned into every frame.
The sources list no integrations. It works as a standalone upload-and-download tool, and users publish the finished video or SRT file to their own channels.
Its low monthly prices and minute-based plans suit small teams and solo creators producing captioned social, training or marketing video. Businesses with very large volumes or other file formats should check the 600-minute cap and the MP4 and MOV limit.