How to Add Subtitles to Videos Automatically

Wondershare DemoCreator

Essential demo-making tool that helps learners, educators, freelancers and gamers to take idea-sharing to the next level.

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Have you heard the term ‘auto caption’? Ever wondered what it means and how you generate them? You must have seen several videos with subtitles correctly and precisely synched with the dialogs that the artists speak throughout the film. Although wrongly (explained later in one of the following sections), those subtitles are sometimes also referred to as closed-captions or open-captions or most commonly, simply captions. In other words, the terms ‘subtitles’ and ‘captions’ are often used interchangeably.

The captions of the audio in a clip can be typed manually or generated automatically by an integrated tool or a dedicated auto subtitle generator app designed specifically for the purpose. Depending on the nature of such an app, it can be installed on your computer or could work online.

Part1 What Is Auto Caption & Subtitle

When talking about the auto caption, as explained earlier, the term means the captions that have been automatically generated using some auto caption generator online or offline app. With such an automatic caption generator, you don’t have to manually type the text and synchronize the content with the video using a resource-intensive post-production application.

Captions vs. Subtitles

While the purpose of the auto caption is to make the viewers read the text if they are unable to hear the audio, the subtitles, in many cases, are the text translations of the audio into a different, understandable language.

When talking about captions, they are of two types, namely:

Closed Captions

These are the time-stamped texts that are stored in a separate file (usually with the *.srt extension) that is automatically accessed by the player when the video is played. Closed captions can be enabled or disabled according to the viewers’ needs, and if the player allows, the format of the text can be modified as well.

Open Captions

These captions are not stored in a separate file but are burned into the video itself. Because of this, they cannot be enabled or disabled manually, and neither can they be formatted manually.

Part2 Add Subtitles Video Automatically – Top 10 Auto Subtitle Generators

Although a plethora of subtitle text generator tools are available online today, listed below are the 10 most used programs for the purpose:

1. Wondershare DemoCreator

Supported OS: Windows, Mac

DemoCreator by Wondershare is a full-fledged video creation and post-production application used by many professionals across the globe to create educational and interactive videos, vlogs, and perform several other editing tasks. One of the best features that DemoCreator has is auto-captioning. The tool uses AI to recognize the audio and then automatically generates the captions according to the dialogues spoken by the artists.

In addition, you can even format the captions according to your preference, and the entire process is extremely easy for both professionals and novice users. Also, the auto caption feature supports over 100+ languages for transactions, you can auto-translate subtitles to your own language. 


Wondershare DemoCreator

481,435 people have downloaded it.

Fast and accurate: With several clicks, the intelligent speech recognition system will transcribe your video automatically, which can save time in manual transcription.

Various languages: DemoCreator auto-caption feature supports over 90 languages. You can choose to translate to your native language.

Intuitive drag-and-drop interface: DemoCreator makes it easy to create videos by letting you simply drag and drop video clips, images, text boxes, and other elements onto the timeline.

Variety of built-in templates: DemoCreator comes with a variety of built-in templates that you can use to get started quickly. These templates are professionally designed and let you create videos in various styles.

You can learn how to use the auto subtitle generator that is integrated into Wondershare DemoCreator by following the instructions that are given below:

Step1 Sign in to Your Wondershare Account

Launch DemoCreator on your computer and click Edit Video from the right side of the initial interface that appears. Next, click Sign In from the top-right corner of the main interface, and when the Login to your Wondershare ID box appears, populate the fields with your account credentials (username and password) and sign in.

sign in

Step2 Import the Source Video

Back on the main window, double-click anywhere inside the Library box and locate and import the source video from your PC to DemoCreator. Once imported, drag the video to the Timeline at the bottom.

import media files

Step3 Begin Audio Recognition for Auto Captioning

Click Caption from the standard toolbar at the top and click Auto-Caption from the options available in the left pane. Now, if the film already has captions, check the Clear Current All Captions box from the middle pane and click Start to Recognize. On the Auto-Caption box, choose the audio language the clip has and click OK to allow DemoCreator to begin audio recognition and add automatic subtitles to video. Once the process is complete, you can use the tools present in the right pane to customize and format the captions as required.

start auto caption recognize
select language
finished transaction

Step4 Export the Video

After everything is done, click Export from the top-right area of the interface, define output preferences in the Export box that appears next, and click Export from the bottom-right corner to export the video with an automatic caption.

export video

Tips in creating auto subtitle:

● 1. Make sure that the audio was recorded in a quiet place.

● 2. Remove any background noise from the audio before using an auto subtitle generator.

● 3. Get rid of any long gaps between the dialogs (they can be synced with the video at the time of editing).

● 4. Before choosing an automatic subtitle generator tool, check if it can recognize the audio language that you mostly deal in.

● 5. Review the auto-generated captions and make the required corrections manually (no auto caption generator is always 100 percent accurate).

3. YouTube Automatic Caption

This is a built-in feature in YouTube Studio and can add automatic subtitle to videos if you select the correct audio language when uploading the clip or after it. Furthermore, the auto-generated captions can be edited on the portal itself and/or downloaded for offline use. Most of the video creators choose the YouTube automatic caption because it's convenient.

youtube automatic caption

Key Features

● The least manual intervention is needed.

● The function is stable, and transaction time will not be spent so long.

● Supports most audio languages spoken across the globe.

● No manual synchronization is needed as the time-stamps are automatically added (may still require some manual adjustments).


Not only YouTube, other social media like Tiktok, Facebook, Twitter, and Instagram also support auto-generate captions now.

4. VLC

VLC is a free and open-source media player that is available for Windows, Mac, and Linux. Although the application doesn’t natively support automatic caption generation and a third-party program is needed, once the subtitles are generated, they can be easily added to the video using VLC.

VLC Media Player can also search for album covers. A playlist function allows for multiple films to play one after the other. This is particularly useful if you have downloaded a film in several parts or just want to watch several shorter videos.

vlc subtitles generator

Key Features

● Offers a simple and intuitive interface, fully customizable according to your preferences.

● It can play almost any media file format that you want to add to its platform. If it cannot play directly, then it can offer easy conversion without quality loss.

● Platform independent (can be used on almost all popular operating systems). Has a wide range of codecs integrated into it.

● VLC media player not only plays video clips rather it can process audio files along with extended support to Podcasts and Internet Radio.


This is another online post-production tool with many features (including an auto subtitle generator) to edit your videos professionally for both personal viewing and commercial distribution. The portal also allows you to create content for social media websites like Facebook, Twitter, Instagram, etc.

veed auto subtitles generator

Key Features

● Can be used without registration, and convert audio into text.

online video editor that lets you add subtitles, translations, collaborate in the cloud and host videos online.

● Has built-in music visualizer, and helps you create educational and explainer videos.

Easy to resize videos for various social platforms.

6. Kapwing

One of the most trusted and used web apps for almost every type of video editing purpose, Kapwing is also a subtitle text generator. In addition, with the timeline-based approach, editing the videos and manually synchronizing the captions with them is easy.

kapwing auto subtitles generator

Key Features

● Offers a common and well-known post-production interface with the toolbox on the left and Canvas as the main workspace.

● Can record computer screen with web camera and audio.

● Gives access to various royalty-free music tracks and sound effects.

● Uses layered tracks approach for post-production tasks.

7. Maestra

Maestra is a dedicated web tool for automatic subtitle generation. The online app can recognize more than 50 audio languages and can transcribe them or generate subtitles and captions automatically. Maestra can be tried for free.

maestra auto subtitles generator

Key Features

● A dedicated tool for audio transcription and subtitles generation.

● Highly accurate, can be tried for free.

● Voiceover creator with more than 30 supported languages.

● Has built-in text editor for manual subtitle/caption adjustments.

8. SubtitleBee

SubtitleBee, as the name suggests, is a dedicated application for online transcriptions and automatic subtitle creations. In other words, the tool is a web app and works on your Internet browser. Furthermore, the intuitive interface doesn’t require you to be technically skilled to get the job done.

subtitlebee auto caption generator

Key Features

● Uses AI to caption creation, and allows text formatting. 

● Allows you to position the captions at your preferred areas in the video.

● Automatically add subtitles and translate your videos to share them on social media.

● Enables you to share the videos with subtitles to social media websites directly.

9. Checksub

This one is also an online tool. Checksub can easily translate subtitles into different languages, can create captions, and can add them to the video. The built-in editor further enables you to manually sync the text captions/subtitles with the film for accuracy.

checksub auto subtitle generator

Key Features

● Allows you to customize the subtitles for font color, styles, and even animations.

● Recognizes most languages that are spoken worldwide.

● Easy subtitle translation.

● Allows editing for least manual intervention.

10. Happy Scribe

Happy Scribe is an online automatic subtitle text generator capable of transcribing the audio. The web app recognizes more than 60 languages and allows you to download the generated files for offline usage.

happy scribe auto subtitle generator

Key Features

● Allows you to download the subtitles in various file formats, including PDF, SRT, VTT, TXT, and many more.

● Has interactive editor for manual corrections and/or adjustments.

● Imposes no file size restrictions.

● Allows team collaboration through workspaces.

Related FAQs

1. What is closed captioning?

As explained earlier, closed captions in a video can be enabled or disabled as required, and can even be formatted for improved visibility or to match the theme of the video. Closed captions for a video are saved in an independent file, typically with the *.srt extension.

2. How to deal with the auto-caption process failure?

While making auto-captioning, you can try to stop the transaction process if the program fails to recognize it. Then launch and sign in to the software again and check your transaction time.