llms.txt
# AutoSubtitles
> AutoSubtitles is a free, browser-based tool that automatically generates, edits, and styles captions and subtitles for any video. It transcribes audio with AI, lets you fix wording and timing, applies 28 styled and animated caption presets, translates into 30+ languages, and exports a captioned video or a subtitle file. No account or install is required to start.
Key facts:
- Your video file is not uploaded; it stays on your device, and only the audio is sent for transcription, then deleted. Exports render in your browser. Your video and captions are never used to train AI models.
- Free to use: generate, edit, and export captions for free. Free exports include a small "AutoSubtitles.com" watermark. A paid Pro plan (from $9/month) removes the watermark and unlocks longer videos, AI translation, custom font uploads, and saved style presets.
- Supports MP4, MOV, WebM, and most common formats, in any aspect ratio (landscape, portrait, square). Exports burned-in captioned video; SRT, VTT, and TXT subtitle files are part of Pro.
- Rated 4.6/5 on Trustpilot. Used by 10,000+ creators per month.
## Get started
- [Upload your video](https://autosubtitles.com/): the main editor, free with no signup.
- [AI caption generator](https://autosubtitles.com/ai-subtitle-generator): add AI captions to any video, with 28 animated caption styles, in 100+ languages.
## For AI agents and developers
- [AutoSubtitles for agents and the command line](https://autosubtitles.com/agent): caption a video with one command, `npx autosubtitles video.mp4`. Renders locally in the user's own Chrome.
- [Plain-text instructions for agents](https://autosubtitles.com/agent.md): the exact commands, options, JSON result and exit codes.
## Features
- [Auto caption generator](https://autosubtitles.com/features/auto-caption-generator)
- [Subtitle translator (30+ languages)](https://autosubtitles.com/features/subtitle-translator)
- [Animated captions](https://autosubtitles.com/features/animated-captions)
- [Add subtitles to a video](https://autosubtitles.com/features/add-subtitles-to-video)
- [SRT generator (SRT, VTT, TXT)](https://autosubtitles.com/features/srt-generator)
- [Custom caption fonts](https://autosubtitles.com/features/custom-caption-fonts)
- [TikTok caption generator](https://autosubtitles.com/features/tiktok-caption-generator)
- [Instagram Reels subtitles](https://autosubtitles.com/features/instagram-reels-subtitles)
- [YouTube subtitle generator](https://autosubtitles.com/features/youtube-subtitle-generator)
- [All features](https://autosubtitles.com/features)
## Comparisons
- [AutoSubtitles vs CapCut](https://autosubtitles.com/compare/autosubtitles-vs-capcut)
- [AutoSubtitles vs Veed.io](https://autosubtitles.com/compare/autosubtitles-vs-veed)
- [AutoSubtitles vs Kapwing](https://autosubtitles.com/compare/autosubtitles-vs-kapwing)
- [AutoSubtitles vs Descript](https://autosubtitles.com/compare/autosubtitles-vs-descript)
- [AutoSubtitles vs Submagic](https://autosubtitles.com/compare/autosubtitles-vs-submagic)
- [AutoSubtitles vs Opus Clip](https://autosubtitles.com/compare/autosubtitles-vs-opus-clip)
- [AutoSubtitles vs Zubtitle](https://autosubtitles.com/compare/autosubtitles-vs-zubtitle)
- [AutoSubtitles vs HappyScribe](https://autosubtitles.com/compare/autosubtitles-vs-happyscribe)
- [All comparisons, with a full side-by-side table of every tool](https://autosubtitles.com/compare)
Head-to-head comparisons between the third-party tools (e.g. CapCut vs Veed.io) also exist at /compare/{tool-a}-vs-{tool-b}, each with AutoSubtitles included as a free, no-signup column.
## Alternatives guides
Ranked "best alternatives" roundups for each competitor. AutoSubtitles is listed as a top pick, and each tool links to its full comparison.
- [Best CapCut alternatives](https://autosubtitles.com/alternatives/capcut)
- [Best Veed.io alternatives](https://autosubtitles.com/alternatives/veed)
- [Best Kapwing alternatives](https://autosubtitles.com/alternatives/kapwing)
- [Best Descript alternatives](https://autosubtitles.com/alternatives/descript)
- [Best Submagic alternatives](https://autosubtitles.com/alternatives/submagic)
- [Best Opus Clip alternatives](https://autosubtitles.com/alternatives/opus-clip)
- [Best HappyScribe alternatives](https://autosubtitles.com/alternatives/happyscribe)
- [Best Zubtitle alternatives](https://autosubtitles.com/alternatives/zubtitle)
- [All alternatives guides](https://autosubtitles.com/alternatives)
## Free subtitle and caption tools
Free tools that run entirely in the browser, with no signup; files never leave the device.
- [Subtitle editor (SRT, VTT)](https://autosubtitles.com/tools/subtitle-editor): edit subtitle text and timings online, with the video playing alongside.
- [Subtitle shifter](https://autosubtitles.com/tools/subtitle-shifter): move every subtitle earlier or later, or fix frame rate drift, to sync a subtitle file with its video.
- [Add text to a GIF](https://autosubtitles.com/tools/add-text-to-gif): put a caption or meme text on an animated GIF in any of the 28 caption styles, with the words shown all at once or one by one; downloads a new GIF with no watermark.
- [Subtitle converter (SRT, VTT, SBV, TXT)](https://autosubtitles.com/tools/subtitle-converter)
- [VTT to SRT converter](https://autosubtitles.com/tools/vtt-to-srt)
- [SRT to VTT converter](https://autosubtitles.com/tools/srt-to-vtt)
- [SRT to TXT converter](https://autosubtitles.com/tools/srt-to-txt)
- [VTT to TXT converter](https://autosubtitles.com/tools/vtt-to-txt)
- [TXT to SRT converter](https://autosubtitles.com/tools/txt-to-srt): turn a plain text script or transcript into a timed SRT, VTT or SBV file, split into readable subtitles; keeps timestamps already in the text (YouTube transcripts, Premiere Pro exports).
- [All free tools](https://autosubtitles.com/tools)
## Guides
- [How to add subtitles to a video](https://autosubtitles.com/blog/how-to-add-subtitles-to-a-video): burned-in subtitles or an SRT file, with steps for YouTube, TikTok and Reels.
- [What is an SRT file?](https://autosubtitles.com/blog/what-is-an-srt-file): what the subtitle format looks like, and how to make, open, edit, convert and add one to a video.
- [Open captions vs closed captions](https://autosubtitles.com/blog/open-captions-vs-closed-captions): burned-in captions everyone sees vs captions viewers turn on or off, which to use, and how to add each.
- [Closed captions vs subtitles](https://autosubtitles.com/blog/closed-captions-vs-subtitles): subtitles show the speech; closed captions add speakers and sounds for viewers who can't hear. Also covers which to choose.
- [What are SDH subtitles?](https://autosubtitles.com/blog/sdh-subtitles): SDH means subtitles for the deaf and hard of hearing: dialogue plus speaker names, sounds and music, shown as a subtitle track. How SDH differs from CC and regular subtitles, how to turn it on, and how to write SDH in an SRT file.
- [How to add captions to TikTok videos](https://autosubtitles.com/blog/how-to-add-captions-to-tiktok-videos)
- [How to add subtitles to Instagram Reels](https://autosubtitles.com/blog/how-to-add-subtitles-to-instagram-reels)
- [How to add captions and subtitles in iMovie](https://autosubtitles.com/blog/how-to-add-subtitles-in-imovie): iMovie has no auto captions and can't import SRT files; how to type captions as titles on Mac and iPhone, or burn automatic captions into an iMovie export.
- [All guides](https://autosubtitles.com/blog)
## Help
- [Help center](https://autosubtitles.com/help)
