Top 5 Best Subtitle APIs & Alternatives (2021)

Using this API, developers can provide subtitles in many different languages for YouTube video media hosted on their platform.

API Features:

Developers who choose to take advantage of this API have access to dozens of subtitle language choices. The API automatically translates audio into other languages, listening first to the native language using speech processing software. Developers can then provide end-users with generated subtitles in their native languages based on the original transcript.

Benefits:

One of the most exciting features this API offers is the ability to provide end-users with dozens of different language options. This ability stems directly from the language-detecting software that the API uses. Additionally, developers can request subtitles in either SRT or JSON format, allowing them to integrate and include these subtitles on content compatible with their platforms.

Pricing:

There are several pricing tiers available for this API. Developers can integrate this API into their platform for free if they expect no more than 100 daily subtitle requests. The pro plan costs $4.99 a month for users who have a larger audience and offers up to 5000 daily requests. Professionals can utilize the ultra plan, which offers 20000 daily requests for only $19.99 a month. Finally, the mega plan provides up to 100000 daily subtitle requests and costs $79.00 a month.

API Features:

One of the most significant issues many end-users experience with subtitles is inaccuracies or misunderstandings. Auto-generated subtitles often provide incorrect translations to alternative languages, causing confusion and misunderstandings that leave viewers disengaged or frustrated. Using this API, developers can offer subtitles that are human-generated, ensuring audio is accurate and translated in a way that makes sense for non-native language speakers.

Benefits:

While there are fewer available language options for this API, the quality of translated subtitles is far superior to many auto-generated subtitle translation services. Therefore, this is an excellent API choice for developers who know that the content they'll be providing will have language-specific audiences who may require subtitle translations.

Pricing:

There are four available pricing tiers for this API, as well. The first tier for this subtitle API is free and provides developers with up to 200 daily subtitle requests. The second tier, known as the pro plan, offers up to 8500 daily requests and costs $4.00. Next, the ultra plan provides up to 30000 daily subtitle requests for $18.00 a month. Finally, the mega plan includes up to 150000 daily requests for $68.00.

API Features:

Unlike the other subtitle programs on this list, this API provides a host of tools for editing and maintaining subtitles. A common issue many end-users experience involves inappropriately timed subtitles, for instance. Using this API, developers can easily sync and convert available subtitles to video audio.

Benefits:

Alongside the ability to edit and convert subtitles, this API also allows developers to detect the original language of audio and provides access to translations upon request. Therefore, end-users receive high-quality, properly-timed subtitles that make sense in their native languages. Finally, developers can change and detect the type of encoding of included subtitles to ensure legibility and understanding for end-users.

Pricing:

This API offers three different pricing plans. The first plan is free of charge and provides developers with up to 1000 daily conversion requests. Next, the pro plan is the second tier plan, offering up to 10000 daily conversion requests for $10.00 a month. Finally, there is the ultra plan. This plan costs $100.00 monthly, offering up to 500000 daily conversion requests.

API Features:

Generating subtitles and captions for videos becomes relatively simple when using this API. Developers can request auto-generated subtitles using a speech-to-text machine learning algorithm. The API takes several different video file types and scans them for audio, translating spoken words into text and providing an SRT file that aligns with the video timing.

Benefits:

Thanks to the machine learning algorithm included in this API, developers receive more accurate and understandable subtitles for their videos. Additionally, they can make corrections to audio subtitles to help the machine learning algorithm better understand future words and phrases moving forward. Ultimately, unlike many other auto-generated captioning services, this API provides accurate, high-quality subtitles and learns and adapts to everyday language.

Pricing:

There are four different pricing plans for this API. The first plan is free and provides up to two monthly subtitle requests. The pro plan is the second tier plan and offers up to 100 monthly video subtitles for $10.00. Next, the ultra plan provides up to 500 monthly subtitle video requests for $39.99. Finally, the mega plan costs $69.99 and provides up to 1000 monthly video subtitle requests.

API Features:

Developers can upload files of up to 500 MB to this API. In return, it provides an SRT or JSON text file based on the developer's request. Alternatively, developers can also request an audio transcript in the form of a text document, providing further flexibility in how they choose to document their videos. Additionally, JSON files provide timing measures, ensuring that the audio and captioning sync up correctly.

Benefits:

This API makes it easy to turn any type of audio file - not just videos - into text format with proper captioning or transcription. Additionally, Kyro includes a vast database of languages, allowing developers to convert audio to text in many different languages. Given the various file types that this API provides developers with, there are many different ways developers can integrate this API into their platform and provide accurate and effective captioning, subtitle and translation services to end-users.

Pricing:

At this time, there is only one price tier for this API. Developers can integrate this subtitle API for free on their platforms, with up to 120 minutes of audio translation per month. After the first 120 minutes of audio translation, there is an associated charge of $0.01 per minute with no audio cap at this time. There is more information on the developer's website regarding bulk-order pricing for developers looking to transcribe large quantities of audio or video.