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The Top 10 Effective SRT Editors Online for 2024

Liza Brown
Liza Brown Originally published Sep 05, 22, updated Mar 27, 24

Have you created the subtitles to be added to the video or audio file, but the time codes do not match the screenplay?

Do you want to create subtitles with different font sizes and colors, but the regular notepad does not allow you to do so?

If yes, you need something more than just a text editor. Creating an SRT file is super easy because you only need a text editor and the knowledge of time codes or stamps. But when you want to edit the same and add a visual appeal, you need feature-rich editors, especially if the subtitle file has .srt format. With an SRT editor online, you can quickly finish editing the subtitles in a snap and synchronize the same with the concerned multimedia file.

As many online SRT file editors are available on the market, we have rounded up the top ten browser-based applications that can make your job easier and stress-free.

In this article
    1. Adobe CC Express
    2. HappyScribe
    3. Nikse.DK
    4. Kapwing
    5. VEED
    6. Flixier
    7. Subtitle Horse
    8. Keevi
    9. SubShifter
    1. Ease of editing
    2. Customization support
    3. Stability
  1. Bonus Tip: The Best SRT Editing Software You Don’t Wanna Miss

Part 1: The Top 10 Effective SRT Editors Online Without Any Download

While third-party tools are there to solve your problems, the online editors allow you to fix an issue or edit the subtitles without downloading quickly. They also make the editing process much easier and less time-consuming, ensuring you finish the job quickly. Read this below section to learn more about our comprehensive list of top online SRT editors.

1.     Adobe CC Express

Adobe CC Express allows you to edit SRT file and add subtitles to different videos for multiple social media channels. You can easily change the text file, time codes, font style and color.

adobe cc express

Key features

  • Easy-to-use interface
  • Helps add the SRT file to different video files
  • Highly stable browser-based tool
  • Supports different SRT file size
  • Best for professionals
  • Does not come with any advertisement
  • Additional video editing tool
  • Beginners need to learn the tool first

Supported OS: Windows and Mac

Ratings: 4.5 out of 5 stars (G2)

Supported language translation: N/A

2.     HappyScribe

HappyScribe is one of the best online platforms to edit SRT file online in an interactive manner. Once you upload the SRT file, the text blocks and the concerned time stamps will be displayed on the right-hand side of the screen. You can change the duration of each subtitle to synchronize it with the video. For example, you can customize maximum characters per line and minimum gap between adjacent captions for better visibility and readability.


Key features

  • Supports different file size
  • Helps you change starting timecode
  • Sharable subtitle file in editing or view-only mode
  • Subtitle preview in comparison with Soundwave
  • Keeps the subtitles protected and confidential
  • Allows subtitle translation to multiple languages
  • Helps you adjust the readability
  • Isn’t free completely

Supported OS: Mac and Windows

Ratings: 4.5 out of 5 stars (Tech Radar)

Supported language translation: English, German, Italian, Mandarin, Japanese, Polish, and Spanish

3.     Nikse.DK

Nikse.DK is an open-source SRT file opener online that helps you adjust the time frames and subtitle texts according to the video requirements. You can upload the SRT file from any local location or use an URL. It is highly stable and keeps your subtitles unchanged.

nikse dk

Key features

  • Allows you to edit SRT files with ease
  • Stable and intuitive UI
  • Supports different file sizes
  • Open-source platform
  • Helps you share your ideas with others
  • Easy-to-use interface
  • Doesn’t have any ad
  • Does not feature an advanced editing option

Supported OS: Mac and Windows

Ratings: 4out of 5 stars (Trust Pilot)

Supported language translation: NIL

4.     Kapwing

One of the best online editors for SRT files is Kapwing. Its easy-to-use interface and the AI-powered automatic subtitle generator help you add and synchronize captions with the video. You can edit the subtitles by changing their position, font size, and font color according to your preferences. In addition, you can also add full or no background or a simple text shadow to the subtitles.


Key features

  • Comes with multiple font style options
  • Supports large-sized SRT files
  • Allows changing text positions
  • Preview option makes subtitle editing easier
  • Free online editor
  • Doesn’t stream ads in between
  • Easy user interface
  • Can change font automatically

Supported OS: Mac and Windows

Ratings: 4.6 out of 5 stars (Trust Pilot)

Supported language translation: 60 different languages, including English, Arabic, Chinese, and Spanish

5.     VEED

Whether you want to get more likes and comments on your Facebook videos or increase user engagement on your YouTube channel, using Veed's online SRT editor will ease all your stress. You can easily edit the time duration of each text in the SRT file and synchronize it with the video. Apart from this, you can also edit the font style, color, text content, and alignment.


Key features

  • Displays the edited subtitles in real-time in the video
  • Helps you change the timing for each text block
  • Synchronizes the subtitles and audio perfectly
  • Allows exporting of the edited SRT file
  • Helps you edit the SRT file in a few steps
  • Features multiple font styles and colors
  • Intuitive user interface
  • Subtitle transcription feature might not work properly

Supported OS: Mac and Windows

Ratings: 3.8 out of 5 stars (Capterra)

Supported language translation: 100 languages like English, Spanish, Chinese, and French

6.     Flixier

Flixier is an excellent SRT editing app with which you can edit an already existing subtitle file and add SRT to MP4 online or any other video format. It has an intuitive user interface to make editing work easier for beginners.


Key features

  • Supports over 1000 font styles
  • Allows you to add custom font
  • Features are timeline window for subtitle preview
  • Allows transcription to multiple languages
  • Easy-to-use interface
  • Fast rendering
  • Allows font customization
  • Doesn’t support free plans

Supported OS: Windows

Ratings: 4.7 out of 5 stars (G2)

Supported language translation: English, German, French, Chinese, and more

7.     Subtitle Horse

Subtitle horse is one of the best options for editing SRT files without paying any price. First, it offers real-time validation to ensure you have a clear idea about the synchronization between the subtitle text and video. The timeline is entirely interactive and helps you edit the subtitles in a breeze. With excellent frame accuracy and various subtitle file fields like read-only and annotation, Subtitle Horse is the best SRT file editor online.

subtitle horse

Key features

  • Ideal for both beginners and professionals
  • You can even customize shortcuts for faster editing
  • You can also translate the language
  • Timeline can be zoomed in for better adjustments
  • Makes search and replace functions easier
  • Allows you to merge multiple subtitles
  • Comes with a restore history option
  • Doesn’t come with much guidance

Supported OS: Windows and Mac

Ratings: N/A

Supported language translation: supports multiple language translations

8.     Keevi

You can now make your videos more readable with Keevi and an existing SRT file. You can easily change the subtitles' font, size, style, and position to make them more understandable and impressive. One of the best features is downloading videos with edited SRT subtitles.


Key features

  • Allows you to add animations and emojis to the subtitle text
  • Change the time code to synchronize video and subtitle
  • Helps you translate the subtitle language
  • Features an interactive timeline
  • Add punctuation marks automatically to the subtitle file
  • Helps you to adjust the frame rate
  • Validates the subtitles in real-time
  • Does not support closed caption subtitle

Supported OS: Windows and Mac

Ratings: N/A

Supported language translation: English, Spanish, German, French, etc.

9.     SubShifter

With SubShifter, you can easily synchronize the subtitle and the video automatically if there is any offset or difference in the time frame. Just upload the file, choose the start and end time, and click the resync button to align the subtitle text with the video.


Key features

  • Automatically synchronizes the subtitle text and video
  • Does not change any front automatically
  • Sync multiple subtitle timing by changing the end/start timings for two files consecutively
  • Share and save as you prefer
  • Remove offset between the SRT file and video
  • Use this offline as well
  • No ads at all
  • Doesn’t allow to edit the fonts manually

Supported OS: Mac and Windows

Ratings: 4.4 out of 5 stars (Mac App Store)

Supported language translation: N/A

Part 2: How to pick the best SRT editor online website?

Finding the best online SRT editor is not easy with so many options available. You should consider many different aspects to avoid ending up with the wrong software. Keeping this in mind, we have explained the three most crucial factors you should consider at any cost.

Ease of editing

Choose an online editor that offers a smooth and streamlined editing process. For instance, it should not have advertisements or sudden pop-up windows. These reduce the editing time and cause a lot of hurdles.

Customization support

You should be able to customize different features of the subtitles with the SRT online editor. It can be the frame rate, emojis, annotations, shortcut keys, etc.


The editor needs to be stable and virus free. Plus, it also needs to keep your subtitles confidential and private.

Bonus Tip: The Best SRT Editing Software You Don’t Wanna Miss

Now that we have established the top SRT editors online one can use, it is time to consider some of the drawbacks. First of all, there is a matter of output quality. Sometimes, the editor tool can change the text, causing discrepancies between the original and edited SRT files.

Therefore, one of the best options will be to choose a tool that is able to deliver consistent performance and help edit the SRT files with ease. Wondershare Filmora is one such tool that you can use to work on the subtitles you have created or downloaded.

Following are the steps to use Filmora for SRT editing.

Free Download
Free Download

1. Download Filmora from the official website and install it on your PC or Mac.

download filmora

2. Start the Filmora program and import the SRT file that you're looking to edit from your PC. Alternatively, you can just drag-n-drop the file.

drag and drop file

3. Then right-click on it and select ‘Advanced Edit’ from the pop-up list.

select advanced edit

4. You can easily change the time codes for the subtitles, edit the texts, split and merge them accordingly. In addition, you can also make changes to the font style and color.

change time codes

5. Once you are done with all the edits, save the file and right click on the timeline where the SRT file is present.

6. Click on Export and choose a convenient location where you would like to download the file.

click on export


In this brief, we have introduced the best browser-based tools to open SRT file online and edit the subtitles according to the video requirements. These will help you make the texts more readable and understandable. You can easily synchronize the video and the subtitle texts to prevent offset.

NB: The 10th online tool, is an auto subtitle generator. It isn’t an SRT editor program.

Liza Brown
Liza Brown Mar 27, 24
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