Best 10 Open Source Subtitle Generators for Free🔍

Finding the best open-source subtitle generator can be tricky in the tech-advanced era. But this post has eased your job by listing the ten best free and open-source subtitle generators with pros and cons to make an informed decision.

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Dawn Tang

Updated on Mar 05, 2024

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Subtitles add charm and appeal to a blunt video. It offers a large audience base to understand the concept more clearly in their native language. When you add subtitles to MP4, it becomes more exciting and attractive to the viewers.

This article has compiled the ten best free and open-source subtitle generators with pros and cons to make your video creation process more manageable and fun. If you are wondering how to add captions to YouTube videos, our suggestions will significantly help. Let's find out the best free subtitle generators available on the web.

10 Free Open Source Subtitle Generators

Auto-subtitle generators are essential for content creators as they enable the audience to follow along with the video's narrative without distraction or difficulties. While everyone cannot afford expensive professional captioning services, we have provided the ten best free and open-source subtitle generators for use. And if you are interested in the differences between subtitles vs. closed captions, do not miss the article given.

1. m1guelpf

m1guelpf subtitles generator

M1guelpf is a free and open-source subtitle generator that automatically generates and overlays subtitles for any video. You can easily create and add subtitles to videos using AI. The software's default setting works well for transcribing the English language. But you can use a bigger model (optional) for better results with other languages. 

               Pros                ☃️Cons
  • Five model sizes are available
  • Offers speed and accuracy tradeoff
  • Four models offer English-only versions
  • You can only add English subtitles to videos

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2. Aegisub

aegisub subtitles generator

Aegisub is a free, cross-platform open-source subtitle generator to create and modify subtitles. This video subtitle generator makes it easy and quick to time subtitles to audio and offers various powerful tools to style them with a built-in real-time video preview. 

               Pros                ☃️Cons
  • Provides a user-friendly and easy-to-navigate interface 
  • Offers a variety of essential features for free
  • Auto-saves projects to reduce the risk of losing edits
  • It does not support the SRT file format
  • Offers limited editing functions

3. Subtitle Edit

subtitle edit subtitles generator

Subtitle Edit is an excellent open-source subtitle generator that helps adjust a subtitle in case it is out of sync with the video in multiple ways. With this tool, you can also make new subtitles from scratch and translate them, merge/split subtitles, and adjust display time.

               Pros                ☃️Cons
  • Offers multiple text editing and caption adjustment functionalities 
  • Includes audio visualizer control and other advanced features 
  • Limited features with minimum scope for customization 
  • Complex interface elements for novice users 

4. Gaupol

gaupol subtitles generator

Gaupol is a free open-source subtitle generator and editor software for text-based subtitle files. This tool lets you create and translate subtitles, time subtitles to match video, and correct common errors. While Gaupol has a built-in video player, it supports launching an external one.

               Pros                ☃️Cons
  • Supports multiple subtitle file formats 
  • Offers creating, editing, and translating subtitles 
  • It lets you check the spelling of your subtitles 
  • Supports only Linux and Windows OS
  • Supports only English language 

5. Subtitle Composer

subtitle composer subtitles generator

Subtitle Composer is an open-source subtitle generator that is perfect for transcriptions, subtitling, and translations alike and is available for Windows and major Linux distributions. It features intelligent language/text encoding detection and allows users to open/save different text subtitle formats.

               Pros                ☃️Cons
  • Supports basic operations like editing text, time, and style
  • Offers real-time preview and spell check
  • The user interface might not appeal to novices 
  • Unavailable for Mac OS

6. Jubler

jubler subtitles generator

Jubler is a competitive subtitle editor to edit SRT files that can be used to convert, transform, correct, and refine existing subtitles. It works on most popular subtitle formats and offers a preview of subtitles in real-time or in design time, spell check, translation mode, and style editing.

               Pros                ☃️Cons
  • Offers simple and easy-to-use tools
  • Supports popular subtitle file types
  • Works well with many devices and OS
  • Limited features for advanced functions 
  • Users must install a video player to assess subtitle results 

7. Amara

amara subtitles generator

Amara is a web-based, free, open-source subtitle generator that helps create and edit subtitles with state-of-the-art features. Its user-friendly interface makes it well-suited for novices and professional users alike. With a speech recognition algorithm, Amara auto-generates subtitles of uploaded videos.

               Pros                ☃️Cons
  • Offers excellent transcription facilities 
  • Requires so download and installation 
  • Works with videos across the web
  • Editing text across subtitles is tricky
  • Must upgrade to Amara Plus for professional services

8. Subtitle Workshop XE

subtitle workshop xe subtitles generator

Subtitle Workshop XE is another open-source subtitle generator that supports creating, opening, editing, and saving subtitle files. With easy-to-use timing tools, it supports the use of external Pascal scripts and OCR scripts. Subtitle Worskop has a customizable interface and allows correcting text errors and fixing timing.

               Pros                ☃️Cons
  • Supports multiple languages 
  • Translation mode available 
  • Supports over 60 text-based subtitle formats 
  • Slight complicated for novices 
  • Supports only Windows OS

9. Open Subtitle Editor

open subtitle editor

Open Subtitle Editor is another worthy, free, lightweight, and open-source subtitle generator for Windows 10/11 that helps generate subtitles in TXT and SRT formats. Users can enter start and end times to display a specific subtitle line in a video and format text using Bold and Italic options.

               Pros                ☃️Cons
  • Offers translating, resyncing, adding/removing subtitles 
  • Creates video subtitles for video files from scratch 
  • Basic editor with tools to only create and edit subtitles
  • Works only on Windows PC

10. FFmpeg

ffmpeg subtitles generator

FFmpeg is one of the most suitable free and open-source options for unlimited subtitling of videos that adapts a wide range of video formats and offers efficient conversion. It allows you to automate the subtitling process from scripts and programs. You can use open-source video converters and create a text file for subtitles with FFmpeg.

               Pros                ☃️Cons
  • A massive range of video formats is available 
  • Adds subtitles to videos 
  • Involves complicate steps 
  • Time-consuming 

Generate Subtitles Automatically on EaseUS VideoKit

While free and open-source subtitle generators ease the job of adding subtitles to videos, there are potential threats due to them being open-source, and these challenges are worth considering. For instance, you may have difficulty using and compatibility issues with your device. They can be free visibly but may have hidden costs.  

EaseUS VideoKit is an efficient and AI-powered all-in-one audio and video editor and creator that helps content creators edit YouTube videos and performs basic functions like compressing or converting video to audio.

Moreover, it works as an audio extractor too. Its artificial intelligence support includes AI vocal remover, noise remover, background remover, and auto-video subtitle generator. 

easeus videokit

With the auto subtitle generator function, you can select a variety of subtitle formats like SRT and TXT files with 200+ font styles, such as Forte, Baloo, Arial, etc., and select the color for fonts as you like. Besides this, EaseUs VideoKit allows you to choose different background colors for subtitles and the position of subtitles, such as left, right, or center.

Key Features

  • Support multi-languages for subtitles 
  • Add subtitles to the video in VLC
  • Edits videos for YouTube and audio
  • Free to download and use 
  • More than 200 font styles
  • Allows adding captions to videos 
  • Simple, straightforward, and easy-to-use UI
  • Exports generated subtitles to an SRT or TXT file

Desktop users like marketers, videographers, streaming influencers, and vloggers can download and use this AI subtitle generator, EaseUS VideoKit, to generate subtitles in one click and prepare their videos effectively!


There you have it! We compiled the best free and open-source subtitle generator to make your video content more enriching and reach a wider audience. Every tool has specific features and limitations that differ from one another. We hope you have found your best subtitling tool now.

However, if you are still looking for it, we suggest you use EaseUS VideoKit as it is simple to use and does not require technical expertise. So try your subtitling editing with EaseUs VideoKit today!

FAQs About Open Source Subtitle Generators

We have covered the best open-source subtitle generators with their features to help you select one. However, if any of your doubts are still unresolved or if you have further questions, you can find out the answers here.

1. Is there a way to auto-generate subtitles?

Multiple options are there that auto-generate subtitles, like Amara and m1guelpf. But the AI-powered EaseUs VideoKit is by far the best auto subtitle generator as it works for Windows and Mac users and performs all audio and video editing functions. 

2. How to create free subtitles?

Our list includes the options of free subtitle editors that help you create one for your videos. You can use EaseUs VideoKit, Jubler, Subtitle Composer, Gaupol, or Subtitle Edit depending on your needs and requirements. 

3. Can VLC auto-generate subtitles?

VLC can automatically generate subtitles using VLSub, an add-on. You can easily download and install VLSub on your system, and it will search for the video subtitles online. You can select the subtitle you want to use from the displayed results.

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