How to Automatically Generate Subtitles (.srt) from Audio and Video

Adding subtitles to your videos has stopped being a nice-to-have and become a must for anyone producing content. They help viewers watching without sound, make video accessible to deaf and hard-of-hearing audiences, and extend your content's reach across different languages and contexts. The catch is that subtitling by hand, syncing every line to the exact moment it's spoken, is slow and tedious work.

The good news is you can generate SRT subtitles automatically in just a few minutes using artificial intelligence. In this guide, you'll learn what an .srt file is, why creators need subtitles, and how to turn any audio or video into a subtitle file that's ready to publish.

What is an SRT file?

SRT stands for SubRip Subtitle, the most popular and widely compatible subtitle format on the internet. It's a plain text file that combines three pieces of information: a sequence number, the time range during which the subtitle appears on screen, and the text matching what's spoken.

In practice, each subtitle block has these parts:

• Number: the subtitle's order (1, 2, 3...).
• Time: when the subtitle enters and leaves the screen, in the format hours:minutes:seconds,milliseconds.
• Text: the line that will be displayed at that moment.

Because it's a universal standard, the .srt file works on virtually every platform: YouTube, Instagram, TikTok, Vimeo, video players, and editing software like Premiere and CapCut.

Why creators need subtitles

Subtitles aren't just about accessibility, although that alone is already a strong enough reason. They directly impact how your content performs. Here are the key benefits:

• Accessibility: they let deaf and hard-of-hearing viewers follow the content, and also help anyone watching in a loud or a silent environment.
• Reach: a large share of social media views happen with the sound off. Without subtitles, those viewers just scroll past.
• Video SEO: subtitle text can be read by search engines and platforms, helping your video get discovered through relevant keywords.
• Retention: subtitles hold attention and help viewers follow along, which increases average watch time.

How to generate SRT subtitles automatically with audio2texts

With audio2texts, you turn audio or video into an .srt file right from your browser, with no software to install. Transcription is powered by Whisper AI, which recognizes speech and syncs the timing automatically. Follow these steps:

1. Open audio2texts in your browser, on your computer or phone.
2. Upload your file: upload the video (MP4, MOV) or audio (MP3, WAV, and other formats) you want to subtitle.
3. Choose the language: the tool recognizes 99 languages, so just select the language spoken in your material or let auto-detection handle it.
4. Start the transcription and wait a few moments while the AI converts the speech into synced text.
5. Review the text: check proper names, technical terms, and punctuation to make sure your subtitles are flawless.
6. Export as SRT: choose the .srt export option and download the file, ready to upload to your platform of choice.

In just a few minutes, you'll have professional subtitles, already timed to match each spoken segment.

Tips for quality subtitles

Generating the file automatically is only the first step. To make your subtitles really shine, it's worth paying attention to a few details:

• Always review them: no matter how good the AI is, uncommon words and slang can come out differently than expected.
• Use clean audio: the better the sound quality, the more accurate the transcription.
• Take advantage of speaker labels: in interviews and conversations, speaker identification organizes the subtitles better.
• Keep lines short: shorter lines are easier to read while the video plays.

Start subtitling for free

You don't need expensive software or hours of manual work to subtitle your videos. audio2texts offers a free plan with up to 3 transcriptions a day, each up to 30 minutes, no credit card required. Besides SRT, you can also export as DOC, PDF, and TXT, all right from your browser.