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Learn more about how SubCaptioner works and get answers to some frequently asked questions.

how Subcaptioner works

Captions and transcriptions in 3 easy steps

how to use the caption editor

About SubCaptioner's Editor

SubCaptioner's editor allows users to make quick edits to their captions and transcript files! It's easy to use - simply open the editor from the projects page once your files have been processed and begin making edits to the text or timing.

To get started in the editor, upload your audio or media file to play alongside the text. Then, begin reviewing the text block-by-block to check for any spelling mistakes or words that the ASR technology may have misinterpreted. To make edits easier, the SubCaptioner editor provides a color coded system to show where errors may have occurred.

Once you're done editing, simply publish the new, edited version and download your files on the projects page.

For more information about the SubCaptioner Editor, click here.

Frequently asked questions

Have questions about our captioning software? Read through the FAQs and if your question still isn't answered, feel free to contact us.

Contact us

Our automated voice processing solution is faster than real time and most files, under 8 minutes, are ready in just a few minutes. Longer files, obviously, take a bit more time but SubCaptioner is much faster than a human captioner at a fraction of the cost.

We offer special pricing for bulk orders. If you have 50+ hours to caption or transcribe, contact us directly at

We currently offer closed captioning services for over 45 languages including Arabic, Bashkir, Basque, Belarusian, Bulgarian, Cantonese (Traditional), Catalan, Croatian, Czech, Danish, Dutch, English (American, Australian or British spelling), Esperanto, Finnish, French, Galician, German, Greek, Hindi, Hungarian, Interlingua, Indonesian, Japanese, Korean, Latvian, Lithuanian, Malay, Mandarin (Simplified or Traditional), Marathi, Mongolian, Norwegian, Polish, Portuguese, Romanian, Russian, Slovakian, Slovenian, Spanish, Swedish, Tamil, Thai, Turkish, Uyghur, Ukrainian, Vietnamese, and Welsh. It’s important to note that accuracy can vary across languages.

We offer automated subtitle translations in over 30 different languages. Visit our “Automatic Subtitle Translator” page to learn more about this service and prices.

Our team is always available to help if you have any concerns about your order. Send us an email at and we’ll respond as fast as we can. Contact us here.

Once you’ve downloaded your closed caption file, you can easily upload this file alongside your video to any platform that you use for video publishing. On Youtube, for example, just look for the menu tab “subtitles” and you’ll be able to easily upload your SRT file here.

We understand that your file and payment safety is incredibly important. We use a secured payment system through Stripe to ensure that your payment information is secure and encrypted. Media files processed by SubCaptioner are deleted once your caption or transcription files have been created and are never seen by anyone other than the ASR technology.

Yes, a minimum charge of $1 US (or equivalent) applies to all transactions – the equivalent of 4 minutes. If you have media files under 4 minutes, we recommend uploading multiple videos to the same cart before checkout.

SubCaptioner provides a free, easy-to-use editor that allows users to make quick edits to the text and timing of their captions. To learn more about the editor, read this article. For more advanced editing and/or longer media files, we recommend a caption/subtitle editing software such as WinCaps.

When checking out, you will be given prices in US Dollars ($), Euros (€), or British Pounds (£) depending on your location.

SubCaptioner supports MP3, WAV, MP4, WMV, and MPEG1 as input files. For output files, we provide SRT and WebVTT subtitle/caption files as well as TXT transcript files.

Our maximum input file size is 1GB with a maximum duration of 120 minutes. If your video is over 1GB but less than 120 minutes long, we recommend you convert the file into an mp3 prior to upload.

SubCaptioner is supported on the latest desktop versions of Chrome, Edge, Firefox, Safari, and Vivaldi. The use of mobile devices is not currently recommended.

Try out SubCaptioner for FREE with a US$10 free credit (equivalent to 40 minutes of free transcription/captions) when you create a new account. No payment card is required to access this free credit. To use the credit, simply upload any media file up to 40 minutes long (or multiple files adding up to the equivalent length). Adding translated subtitles will deduct the free credit total at an additional $0.25/minute. Your free credit never expires, but cannot be used as a part payment for larger files.

There have been cases of users not being able to log in to their SubCaptioner account due to Bitdefender blocking their access. We recommend deleting Bitdefender from your computer if this problem occurs and using a different cybersecurity software.

How SubCaptioner creates up to 99% accurate captions and transcripts

SubCaptioner uses advanced ASR (automatic speech recognition) technology to automatically convert speech to text and create SRT and text files. Once a customer uploads their media file to the SubCaptioner platform, our ASR technology extracts the audio and begins processing the speech. This speech is then formatted to either create an SRT file or text file.

An SRT file (caption file) breaks down the speech into time stamped caption boxes. When added to a video file, these captions display text as it coordinates with the speech. A text transcript file simply breaks down the speech into text blocks based on speaker changes or pauses/utterances. SubCaptioner also provides the option to translate these captions and transcripts into a foreign language.

Although SubCaptioner's ASR technology can achieve up to 99% accuracy, small errors may occur when the audio contains loud background noises, multiple speakers talking at one time, or speakers with strong accents or mumbled speech. SubCaptioner's editor gives users the opportunity to quickly make edits to their text files in order to easily fix minor errors and improve the accuracy of their captions and transcripts. 

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