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[SUB to SRT] – Free Convert .sub Files to .srt with Two Simple Methods
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[SUB to SRT] – Free Convert .sub Files to .srt with Two Simple Methods

Author by Oswald

Update on December 30, 2019

SUB subtitle files, with .sub as the file extension, are image-based subtitles ripped from DVD/Blu-ray discs and are not perfectly supported on certain devices, which might bring about display issues during playback. For proper viewing, it wouldn’t be necessary to ditch the current useless SUB files you’re holding and look for SRT subtitles online, we can manage to convert SUB to SRT so that the new output subtitle will be perfectly recognized. The only problem left is how. There’re two methods provided below, and they are all free and quite simple, keep reading to learn more.

Part 1. How to Convert SUB Files to SRT with Subtitle Edit

Yes, I figure you’ve already tried some subtitle converters but some of them just can’t process SUB subtitles nicely whatsoever like how they deal with other subtitles. According to my test result, if talking image-to-txt subtitle conversion, OCR is the most reliable process (Optical Character Recognition, the process of capturing characters from bitmap and export it as plain text).

Let’s skip the jargon… The recommended tool here is Subtitle Edit. This SUB to SRT converter is clean, small, easy-to-use, open-source and practical. Now I’d like to show you how to use it.

Convert .sub to .srt in Subtitle EditConvert .sub to .srt in Subtitle Edit

Step 1. Hit “Download latest version of Subtitle Edit” fromwww.nikse.dk/subtitleedit to download Subtitle Edit. Install it to your PC and Launch it.

Step 2. Locate “File” tab at the upper-left side of the interface, select “Open VobSub(sub/idx)” to import SUB subtitles.

Convert SUB File to SRT Using OCRConvert SUB File to SRT Using OCR

Step 3. Click “Start OCR” button to start the OCR process, the program will automatically transcribe the image subtitles to text. If there’s an incorrect transcription, you can manually modify it at the blank box on the left side anytime. When it’s all set, hit “OK”.

Export when SUB SRT Conversion is DoneExport when SUB SRT Conversion is Done

Step 4. Now you are back to the main workplace. Locate “Format” option from the upper-right side, set it as “SubRip(.srt)”, then customize the subtitle encoding if needed. At last, go to “File” tab again and select “Save as”, define the output file name and save the file.

Now you have pure text subtitle SRT at hand, they have good compatibility and are well-supported by most devices. Adopt it to your movie and see if it works, I believe there won’t be further playback issue this time.

Related articles: SUP to SRT, PGS to SRT, Extract Subtitles from DVD

Part 2. How to Convert SUB to SRT Online Free

Perhaps some of you guys prefer online methods, well, there is a one. Note that online subtitle converters may not perform the job as well as you expect, but they are a good support to draw if you are trying to convert some small subtitle files in good network condition. The recommended online SUB SRT converter is SubtitleTools, an online service that helps you to transcribe captions of many kinds. It’s probably the most stable one among all, with acceptable conversion speed.

Convert SUB Subtitle to SRT Online Convert SUB Subtitle to SRT Online

Step 1. Navigate to Subtitle Tools: https://subtitletools.com/convert-sub-idx-to-srt-online

Step 2. Import .sub file, .srt file, .ifo file(optional) as instructed. Hit “Convert to SRT” after uploading to convert SUBs to SRT, and that’s all. The process could take quite some time, and if the website is busy, your file will be queued.

Part 3. Additional Reading: How to Add Subtitles to Video (Free)

How to Add Subtitles to Videos with Free HD Video Converter Factory

Add Videos to the Program

Before start, please free downloadfree download the software.

Step 1. Import Videos You Intend to Add Subtitles

Install and launch WonderFox Free HD Video Converter Factory. Click “Add Files” button from the upper-left side of the interface, choose the video(s) you want to add subtitles. Define the output file folder at “Output Folder” box below. Notice the program add subtitles by hardcoding, thus it’s irreversible that the hardcoded subtitles can’t be removed. So, backup the movie if needed.

Add SRT to Videos

Step 2. Add Subtitles to the Videos

Click on the options button with a character “T” on the video’s information bar, select “Choose subtitle” to add the corresponding subtitle to it. If needed, go to the right side of the interface to convert video format. For instance, your video is VOB format, you can convert it to MP4 for smaller file size and better compatibility. When ready, hit “Run” to start the hardcoding.

At last...

It would be great if you find these free gifts handy and helpful as I do. Hope you can enjoy your movies with brand new perfect subtitles after reading. Further questions? Feel free to reach me by clicking my avatar.

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Other Recommended Software for DVD Owners

Other Recommended Software for DVD Owners

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Are you in possession of some DVD collections but scratching your head about how to downscale the space they take? WonderFox DVD Ripper Pro can definitely help you, it can losslessly copy your DVD collections to digital files to store them in the smallest space occupation – PC-storage-wise as well.

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