Free AI YouTube Captions: Auto-Generate Subtitles Easily

Nov. 28, 2025

Free AI YouTube Captions: Auto-Generate Subtitles Easily | AI Transcription Service - Mr. Transcription
How can I automatically create captions for my videos?
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Automatically creating captions for your YouTube videos is highly recommended!

When you create videos, do you spend hours making captions?

Transcribing video audio into text to create captions is one of the most time-consuming tasks in video editing.

Actually, you can automatically create video captions by leveraging the latest AI technology.

Simply upload your video to a cutting-edge AI service, and it will automatically transcribe the spoken content using speech recognition.

You can then download it as an SRT file and easily insert captions into your video editing software or YouTube.

This article will explain in detail how to automatically create captions!

We'll also cover how to add captions to Adobe Premiere, DaVinci Resolve, and YouTube videos, so why not try adding automatically generated captions to your videos?

[Free] Latest AI Service Recommended for Automatic Caption Creation

Mr. Transcription

If you want to automatically create video captions, Mr. Transcription is highly recommended!

Mr. Transcription is an AI service that can automatically transcribe video audio into text.

Its biggest feature is that it can create captions directly from videos.

When you upload a video file to the site, the speech recognition AI automatically creates text from the video file.

The converted text can be downloaded directly in SRT format.

Then, simply import the SRT file into your video editing software or YouTube, and captions will be inserted automatically and easily.

What's more, Mr. Transcription is free!

It's available without registration or login, so why not try automatically creating YouTube video captions for free with Mr. Transcription?

[Free] Recommended Method for Automatic Caption Creation: Detailed Usage Guide

Now, let's dive into how to automatically create captions using the AI transcription service Mr. Transcription!

Mr. Transcription is an AI service that allows anyone to easily create YouTube video captions with simple operations.

You can save video captions in SRT format and easily import them into video editing software or YouTube.

1. Prepare the video file for adding captions

Prepare the video file for adding captions

First, prepare the video file for which you want to automatically create captions.

Mr. Transcription supports the following video file formats:

  • MP4
  • MOV
  • AVI
  • FLV
  • MKV
  • WEBM
  • WMV
  • 3GP

It supports all major video file formats, so you can upload anything from files exported from video editing software to files just shot on your smartphone, as is.

It's also recommended to export only the audio track of the video for transcription

When editing videos for platforms like YouTube, there's a recommended method.

That is, to complete all editing except captions first, and then export only the audio track of the video in formats like MP3 or WAV and upload it.

Encoded files from video editing software can sometimes be several GBs in size.

Audio files are much smaller, ranging from a few MBs to tens of MBs, so uploading is instant.

This allows you to create captions much more smoothly than uploading the entire video file.

2. [Free] Transcribe video audio into text

Once you have your video or audio file ready, transcribe it into text with Mr. Transcription.

First, open the top page of Mr. Transcription.

On the top page, you can select your video or audio file using either of these methods:

  • Drag and drop the file
  • Click "Select File"

Select audio file

Select the language used in the video.

Select language

Usually, the language used on your PC (e.g., "Japanese" if it's Japanese) is selected.

If you want to create YouTube video captions for a foreign audience, select the language used in the video, such as English.

Now you're ready.

Ready

Click the upload button.

Once the upload is complete, transcription will start automatically.

Automatic transcription starts

Mr. Transcription uses the latest speech recognition AI.

Even long video/audio files are processed in just 10 minutes.

If you're using it without registration or login, keep the screen open until processing is complete.

If you're registered and logged in, you'll receive an email notification when the transcription process is finished.

Notification email after transcription completion

You can check the processing results from the link URL in the notification email or from the "History" page in the menu.

Video Caption Transcription Completed

Once the transcription process is finished, the screen will change, and the transcription results will be displayed.

Transcription completed

With Mr. Transcription, no special operations are required to save the transcribed content as captions.

Simply click the "Download Subtitles" button.

Download subtitles

When you open the downloaded file with a text editor, you'll see that it has been automatically converted to SRT format for video captions, like this.

Example of opening in a text editor

Download also available from the history page

SRT files created with Mr. Transcription can also be downloaded from the History page.

The History page can be opened from the menu on the Mr. Transcription page.

How to open history

Once the History page opens, click on the area where the file name is displayed.

History page

The detailed page for the transcription results will open, so click "Download Subtitles" to save the file.

Download subtitles

The history page displays a list of all previous transcription results, so you can re-save previously transcribed text as captions.

3. Insert captions using video editing software or YouTube Studio

With this, you have successfully used the AI transcription service Mr. Transcription to automatically create an SRT file for video captions for free.

All that's left is to import the SRT file into video editing software like Adobe Premiere Pro or DaVinci Resolve, or into the details screen of a video uploaded to YouTube.

SRT is a standard file format widely used for video captions.

It can be utilized in a wide range of situations, from video editing software to video hosting sites.

Since you can easily insert captions automatically, why not try automatically creating an SRT file for video captions with Mr. Transcription yourself?

How to Insert Automatically Created Captions in Adobe Premiere Pro

From here, we will explain how to insert SRT files automatically created with the AI transcription service Mr. Transcription into videos.

First, we'll show you how to add captions using an SRT file in Adobe Premiere Pro, a video editing software used by professionals.

*This explanation uses the Windows version of Adobe Premiere Pro.

1. Import the SRT caption file into the project

Inserting captions from an SRT file in Adobe Premiere Pro is very easy.

First, open the video editing project where you want to insert the captions.

Open project

In the bottom left of this screen is the Project panel (where a list of assets like videos and audio is displayed).

Import the SRT file here.

The method is the same as importing other assets like videos and audio:

  • Drag and drop the file directly into the Project panel
  • Select "Import" from the File menu

Either method works.

This time, we dragged and dropped the SRT file.

Import SRT file

When the SRT file is loaded, Adobe Premiere Pro automatically recognizes it as a video caption file.

SRT file loaded

2. Place captions on the timeline

Next, drag and drop the imported SRT file onto the timeline to place it.

Drag and drop onto timeline

A "New Caption Track" dialog will appear; confirm the contents and click "OK".

New Caption Track

A "Subtitles" track will be added to the upper row of the timeline, and captions will be inserted.

Captions added

With this, you have successfully added captions from an SRT file to the Adobe Premiere Pro timeline automatically.

Captions displayed

3. How to customize captions (subtitles) in Adobe Premiere Pro

Captions read as "subtitles" in Adobe Premiere Pro can also be edited visually.

To edit the font and color of the captions, open the "Essential Graphics" panel.

Essential Graphics

In this example image, Essential Graphics is displayed in the upper right of the project screen.

Essential Graphics has two screens:

  • Browse
  • Edit

Open the "Edit" screen to edit font size, font type, decorations, and more.

Essential Graphics Edit screen

For example, you can change the font of video captions like this,

Example of changing caption font

or change the color of the caption's outline (shadow), among various other edits.

■ AI transcription service "Mr. Transscription"

"Mr. Transcription" is an online transcription tool that can be used from zero initial cost and 1,000 yen per month (* free version available).

  • Supports more than 20 file formats such as audio, video, and images
  • Can be used from both PC and smartphone
  • Supports technical terms such as medical care, IT, and long-term care
  • Supports creation of subtitle files and speaker separation
  • Supports transcription in approximately 100 languages ​​including English, Chinese, Japanese, Korean, German, French, Italian, etc.

To use it, just upload the audio file from the site. Transcription text is available in seconds to tens of minutes.
You can use it for free if you transcribe it for up to 10 minutes, so please try it once.

It is "Mr. Transcription" who can easily transcribe from audio, video, and images. Transcription allows you to transcribe for up to 10 minutes for free. You can copy, download, search, delete, etc. the transcribed text. You can also create subtitle files, which is ideal for transcription of interview videos.
HP: mojiokoshi3.com
Email: mojiokoshi3.com@gmail.com
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