Open captions are text that appears on screen and cannot be turned off

Open captions are words, sounds, and speaker names displayed directly on the video itself as a permanent part of the image. Unlike closed captions, which a viewer can toggle on or off, open captions are always visible — burned into the video file itself. If you watch the video, you see the captions. If you don't want to see them, you have to watch a different version of the file.

The distinction matters because it changes how captions are created, stored, and used. Open captions are embedded during video production or editing, while closed captions live in a separate data track that players can read or ignore. For developers and content creators, understanding which type you need affects your workflow, file size, and how accessible your video actually becomes.

Key Takeaways

  • Open captions are burned into the video image and cannot be hidden, so every viewer sees them whether they want to or not.
  • Closed captions are stored separately and can be turned on or off by the viewer, making them more flexible for different audiences.
  • Open captions increase file size and are harder to edit after the video is finalized, but they work on any player without additional support.
  • Open captions are useful when you want captions to be mandatory — for clips shared on social media, videos without sound, or content in noisy environments.
  • Creating open captions requires video editing software and happens before the final export, unlike closed captions which can be added afterward.

How open captions differ from closed captions

Closed captions are stored in a separate track within the video file or as a companion file (usually in WebVTT, SRT, or CEA-608 format). A media player reads this track and displays the text on top of the video only if the viewer turns them on. YouTube, Netflix, and most streaming platforms use closed captions because they let each viewer choose whether to see them.

Open captions are different: they are part of the image itself. During video editing, you add text to the timeline, position it, style it, and then export the video with the captions permanently included. The caption text becomes pixels in the video, indistinguishable from the rest of the image. There is no separate track to read, no toggle to switch off. The viewer sees what you created.

This has practical consequences. A closed-caption file might be 50 kilobytes; a video with open captions is larger because the captions are encoded into every frame they appear in. Editing is also different: if you need to fix a typo in closed captions, you edit the caption file. If you need to fix a typo in open captions, you re-export the entire video.

When open captions make sense

Open captions are most useful when you want captions to be unavoidable. Social media clips — especially short videos on TikTok, Instagram Reels, or YouTube Shorts — often use open captions because many viewers watch without sound in public or noisy places. The captions ensure your message gets through even if the audio is muted or inaudible.

Videos designed to be watched without sound also benefit from open captions. A silent demo, a before-and-after comparison, or a visual tutorial may not have audio at all, so closed captions are pointless. Open captions become the primary way to convey dialogue or narration.

Some creators use open captions for stylistic reasons — they become part of the video's design rather than an accessibility feature. A podcast clip with bold, colored captions can feel more polished or engaging than plain white text. In these cases, the captions are intentional design elements, not just a fallback for viewers who need them.

The technical process of creating open captions

Creating open captions requires video editing software. Programs like Adobe Premiere Pro, DaVinci Resolve, Final Cut Pro, or even free tools like OpenShot or Shotcut all support adding text to video. The basic process is the same: import your video, add a text layer for each caption, position and style it, sync it to the audio, and then export the final file.

Timing is critical. You need to know exactly when each caption should appear and disappear. If your video has dialogue, you typically start the caption a fraction of a second before the speaker begins and end it when they finish. For narration or sound effects, you caption the moment the sound occurs. Most editors let you set in and out points frame-by-frame, so you can be precise.

Styling matters too. You choose font, size, color, and background. Many creators use white text with a black outline or semi-transparent background so captions remain readable over any part of the video. Some add speaker names in brackets — [MARCUS]: — to clarify who is talking, especially if multiple people speak.

After you finish timing and styling all captions, you export the video. This is where open captions become permanent. The export process renders every frame, baking the caption text into the image. The resulting file is larger than the original because it contains more visual information, but it plays on any device without requiring caption support.

Accessibility and open captions

Open captions do make video content accessible to deaf and hard-of-hearing viewers, but they are not the preferred method from an accessibility standpoint. Closed captions are better because they give viewers control: someone who is hard of hearing but can hear some dialogue might turn captions on only for unclear sections. Someone who is deaf needs captions always on, and open captions deliver that. But someone who hears perfectly and finds captions distracting cannot turn them off.

The best practice is to provide both. Export your video with open captions for social media and platforms where viewers cannot control caption display, and also upload a closed-caption file for platforms like YouTube or Vimeo where viewers can toggle them. This way, you reach the widest audience: people who need captions always see them, and people who don't want them can turn them off.

If you are creating video content for a website or application you control, closed captions are almost always the better choice. They are smaller, easier to edit, and more flexible. Reserve open captions for situations where you cannot rely on the player to support closed captions — which is increasingly rare, but still happens with some embedded players or older systems.

File size and playback considerations

Open captions increase file size because the caption text is encoded into the video stream itself. A 10-minute video with captions on screen for 8 minutes might be 50 to 100 megabytes larger than the same video without captions, depending on resolution, frame rate, and codec. This matters if you are uploading to platforms with file-size limits or if viewers are downloading on slow connections.

Playback is not affected — open captions play on any device that can play the video file. There is no dependency on the player supporting a caption format or the viewer having captions enabled. This is why open captions are useful for videos shared across many platforms or embedded in places where you cannot control the player.

Closed captions, by contrast, add almost no file size. A caption file is text, so it might be kilobytes rather than megabytes. But closed captions only work if the player supports them and the viewer turns them on. If you upload a video to a platform that strips caption tracks, your closed captions disappear. Open captions survive because they are part of the image.

Tools and software for adding open captions

Professional video editors like Adobe Premiere Pro and DaVinci Resolve have robust text tools. You can add multiple text layers, animate them, apply effects, and sync them precisely to audio. Both programs let you save caption styles as presets so you can apply consistent formatting across a whole project.

Free alternatives exist. OpenShot, Shotcut, and Kdenlive all run on Windows, Mac, or Linux and support text layers. They are less polished than professional software but handle basic captioning. If you are adding captions to a few short videos, they are sufficient.

Some creators use a hybrid approach: add captions in a dedicated subtitle editor like Subtitle Edit or Aegisub, export as an image sequence, and then import those images into their video editor. This is slower but gives you fine control over caption appearance and timing.

For batch processing — adding the same caption style to many videos — some developers write scripts using FFmpeg, a command-line tool that can overlay text on video. This requires technical knowledge but is fast and repeatable once set up.

Frequently Asked Questions

Can I remove open captions from a video once they are added?

No, not without re-editing the original video. Open captions are part of the image, so removing them means going back to your editing software, deleting the caption layers, and exporting again. This is why it is important to get captions right before you finalize the video. If you need to make changes later, you will need the original project file.

Should I use open captions or closed captions for YouTube?

YouTube supports closed captions natively, so use those. Upload a caption file or use YouTube's auto-caption feature and let viewers toggle captions on or off. Open captions are useful for short clips you share on social media where viewers may not have sound, but for full videos on YouTube, closed captions are more flexible and standard.

Do open captions work on mobile devices?

Yes. Because open captions are part of the video image, they display on any device that plays the video — phones, tablets, computers, smart TVs. There is no dependency on the device or app supporting a caption format. The captions are just pixels on the screen.

What font should I use for open captions?

Use a sans-serif font like Arial, Helvetica, or Open Sans in a size large enough to read on small screens. Avoid thin or decorative fonts that become hard to read when compressed or viewed on phones. Add a semi-transparent background or outline so captions remain readable over any part of the video, whether the background is light or dark.

Can I add open captions to a video that already has closed captions?

Yes. You can import a video with closed captions into an editor, add open caption text layers on top, and export. The closed captions remain in the file (if the editor preserves them during export), and the open captions are now visible. However, this creates redundancy — viewers see both, which is confusing. Do this only if you have a specific reason to include both.