How to Add Subtitles to Videos for TikTok and Reels

How to Add Captions and Subtitles to Social Videos

Picture a viewer in a waiting room, on a train, or in bed next to someone asleep. They stop on your video, but the sound is off. Without captions, they see a person talking and keep scrolling. With captions, they get the message.

Captions are one of the simplest upgrades you can make to a social video. They help people watching on mute, people who are deaf or hard of hearing, and people watching in a second language. This guide shows how to add them on each platform, when to use a video caption generator instead, and how to style captions so they are easy to read.

Key takeaways

• Captions make videos work without sound, and make them accessible to the roughly 430 million people worldwide with disabling hearing loss, according to the WHO.

• TikTok, Instagram, and Facebook all offer built-in auto captions, which are fast but need checking.

• A video caption generator transcribes speech with AI and lets you edit, style, and export captions, either burned into the video or as an SRT file.

• Always proofread. Names, brand terms, numbers, and accents are where auto captions most often go wrong.

• Keep captions short: one or two lines, high contrast, inside the platform’s safe zone.

• Open captions (burned in) look the same everywhere; closed captions can be turned on or off by the viewer.

Captions vs subtitles: what is the difference?

The terms are often used interchangeably, but there are differences worth knowing:

For most social videos, burned-in open captions are the safest choice, because they show up the same way on every device and in every feed.

How to add captions on TikTok

1. Record or upload your video and go to the editing screen.

2. Tap Captions in the editing tools. TikTok transcribes the speech automatically.

3. Review the text. Tap to edit any words that are wrong, especially names and product terms.

4. Save and continue to post.

Viewers can also turn auto-generated captions on or off in their own accessibility settings. If you want a specific style, such as large highlighted words, add captions in an editor before uploading instead. For text placement, keep captions away from the bottom and right edges where TikTok places buttons and descriptions; our tiktok video size guide shows the safe zone.

How to add captions to Instagram Reels

1. Start a new Reel and select or record your video.

2. Open the stickers menu in the Reels editor and choose the Captions sticker.

3. Let Instagram transcribe the audio, then edit any mistakes.

4. Pick a style and drag the captions to a clear area of the frame.

5. Continue and share.

The same sticker works in Stories. Instagram also offers auto-generated captions that viewers can turn on, but the sticker gives you control over how captions look. For the rest of the upload process, see how to post a video on instagram.

How to add captions to Facebook videos

Facebook gives you three main options when uploading a video from a Page or Meta Business Suite:

• Auto-generate captions, then review and edit them before publishing.

• Upload an SRT file with your own captions. The file name needs a language and country code, for example product-demo.en_US.srt.

• Write captions manually in the caption editor.

Because Facebook captions are usually closed captions, viewers with captions turned off will not see them. If silent viewing matters, burn captions into the video before uploading.

What is a video caption generator?

A video caption generator is a tool that uses AI speech recognition to turn spoken words into timed captions. Most let you:

• Transcribe audio automatically in one or more languages.

• Edit words and timing in a text editor.

• Style captions with fonts, colors, backgrounds, and word highlights.

• Translate captions into other languages.

• Export captions burned into the video or as a separate file, such as SRT or VTT.

How to add subtitles to a video with a caption generator

1. Upload your video to the caption tool.

2. Choose the spoken language so transcription is accurate.

3. Generate captions automatically.

4. Proofread every line. Fix names, product terms, numbers, and punctuation.

5. Adjust timing so each caption appears with the words being spoken.

6. Style the captions with your brand font and colors, keeping high contrast.

7. Translate if you want subtitles in other languages.

8. Export as a video with burned-in captions for social, or as an SRT file for platforms that accept caption files.

9. Watch the final video on a phone with the sound off before publishing.

What does an SRT file look like?

An SRT file is a plain text file with a number, a time range, and the caption text for each line:

1
00:00:00,000 --> 00:00:02,400
This lid survived a full bag drop.

2
00:00:02,400 --> 00:00:05,100
Here's what happened next.

Most caption generators create this for you, but knowing the format helps when you need to fix a timing or typo by hand.

How to style captions people can actually read

Word-by-word captions with a highlighted active word are popular on short videos, especially for talking head video formats. They keep attention, but keep the motion simple so it does not distract from the message.

Common caption mistakes

• Publishing auto captions without checking them. A wrong brand name or number damages trust.

• Captions hidden behind app buttons. Test on a phone before posting.

• Captions out of sync with the speech, especially after editing the video.

• Too much text at once, forcing viewers to choose between reading and watching.

• Low-contrast colors that disappear over bright footage.

• Forgetting translations when you have viewers in other languages.

• No captions on videos with music only. If on-screen text carries the message, make sure it is large enough to read.

Make videos that work without sound with LayerProof

The easiest way to make a video work on mute is to design it that way from the start. Mylar, LayerProof’s ai motion graphic video generator, builds every scene around animated on-screen text and visuals, with synchronized AI narration on top, so the key message reads clearly whether the sound is on or off. Start from a link, document, image, or script, apply your brand kit so fonts and colors stay consistent, and edit any scene through the AI agent or with keyframes.

When the videos are ready, LayerProof schedules and publishes them to TikTok, Instagram, and Facebook from one Calendar. Plans start at $5 a month. Make your next video mute-friendly, and get started today.

Captions and subtitles FAQ

How do I add subtitles to a video for free?

Use the built-in auto captions on TikTok, Instagram, or Facebook, or a video editor with free auto captions. Review the text before publishing.

What is the best video caption generator?

The best choice depends on your workflow. Built-in platform captions are fastest for single posts, while dedicated caption generators are better for styling, translations, batch editing, and SRT exports.

Should I use open or closed captions on social media?

For most social videos, open (burned-in) captions are safer, because they appear the same on every device and do not depend on viewer settings.

How accurate are auto captions?

Auto captions are usually good for clear speech in common languages but often miss names, brand terms, numbers, accents, and overlapping voices. Always proofread.

What is an SRT file?

An SRT file is a plain text caption file that lists each caption with a number and start and end times. Many platforms and video players accept SRT uploads.

Do captions help videos perform better?

Captions make videos understandable without sound and accessible to more people, which helps viewers stay and follow the message. Results vary, so compare watch time with and without captions on your own account.

References

• Deafness and hearing loss, World Health Organization

• English (USA) Timed Text Style Guide, Netflix Partner Help Center

• Understanding Success Criterion 1.2.2: Captions (Prerecorded), W3C