Free AI YouTube Captions: Auto-Generate Subtitles Easily
Nov. 28, 2025

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
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

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 the language used in the video.

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.

Click the upload button.
Once the upload is complete, transcription will start automatically.

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.

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.

With Mr. Transcription, no special operations are required to save the transcribed content as captions.
Simply click the "Download Subtitles" button.

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.

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.

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

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

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.

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.

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

2. Place captions on the timeline
Next, drag and drop the imported SRT file onto the timeline to place it.

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

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

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

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.

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.

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

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.
Email: mojiokoshi3.com@gmail.com
Transcription for audio / video / image transcription. It is a transcription service that anyone can use for free without installation.
- What is Mr. Transcription?
- Transcript images, sounds, and videos with Mr. Transcription
- Free registration
- Rate plan
- manual
