Generate subtitles for a video online for free. Upload your video and get automatically generated subtitles based on its spoken audio
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Accepted: .mp4,.mov,.avi,.mkv,.mp3
Typing out subtitles by hand means listening to your video over and over, pausing constantly, and timing every line so it lines up with what is being said. It is slow, repetitive work even for a short clip, and it only gets more tedious as a video gets longer. The Auto Subtitle Generator on File Tools Online listens to your video's audio and generates subtitles automatically, without you transcribing a single word yourself. Upload your video, let the tool process it, and get your subtitles back. There is nothing to install and no manual typing, you upload a video with spoken audio and get subtitles for it in return.
Open the Auto Subtitle Generator and choose the video you want subtitles for. Drag and drop it, or select it from your device.
The tool listens to the spoken audio in your video and generates matching subtitles automatically.
Receive your generated subtitles, ready to review, use, or share.
Your original upload is not changed by the process, you simply receive your subtitles alongside it.
Subtitles are generated from your video's spoken audio automatically, no manual typing.
Skip installing captioning software, upload your video and get your subtitles directly.
The tool runs in your browser, no desktop software or plugin required.
Generate subtitles from a laptop, desktop, or phone, using nothing more than a web browser.
Your file is processed over HTTPS and automatically deleted from our servers within 30 minutes.
There is no cost to generate subtitles or get your result.
Automatic subtitle generators like this one work by using speech recognition to listen to the spoken audio in your video and convert it into text, then aligning that text with the timing of the speech. This is a form of automatic transcription, not a lookup of subtitles that already exist somewhere else, the tool is generating new subtitles by listening to your specific video, it is not searching a database of existing subtitle files for movies or shows.
That also means it works on your own uploaded video, not as a way to find ready-made subtitles for a movie or TV episode you already have. If you are looking to download an existing subtitle file for commercial content, that is a different kind of service entirely, this tool generates subtitles fresh from whatever audio is in the file you upload. It also means the quality of the result depends entirely on what is actually in your video's audio track, not on any outside database of scripts or dialogue.
Getting subtitles onto a video comes up constantly, whether for accessibility, social media, or simply making a video easier to follow with the sound off. Most of these needs share the same underlying problem: someone needs an accurate transcript of what was said, matched to the right moment in the video, and typing that out by hand is rarely worth the time.
Whether this tool burns the generated subtitles permanently into your video, gives you a downloadable subtitle file such as an SRT you can use separately, or offers both, is set inside the tool's own interface and is not something we can confirm without testing the live tool directly. File Tools Online also has a dedicated Add Subtitles to Video tool that is confirmed to burn auto-transcribed captions directly into a video, so if you specifically need captions baked permanently into the picture, that tool is a safe bet regardless of what this one produces. If you need an editable subtitle file instead, check this tool directly to confirm the output format before uploading.
Automatic speech recognition has gotten very good at transcribing clear speech, but it is not perfect. Accuracy tends to drop with heavy background noise, overlapping speakers, strong accents, mumbled or fast speech, and specialized or technical vocabulary the model was not trained on. For casual use, generated subtitles are usually accurate enough to follow along easily. For anything published professionally or used for accessibility compliance, it is worth reviewing the generated subtitles for mistakes before publishing. Names, brand terms, and niche jargon are the most common places an automatic transcript gets something wrong, so give those a second look in particular.
The tool accepts common video formats such as MP4 and MOV. Whether it also accepts an audio-only file directly, useful if you already have a podcast episode or voice recording rather than a video, is unconfirmed, check the tool directly if that is your use case. If your source file is in a less common video format, run it through the Video Converter first, then generate subtitles from the result. Confirm the exact accepted list against the live tool if you are working with an uncommon container format or codec.
Adding subtitles to a video traditionally meant opening dedicated captioning software, or typing out a transcript by hand and manually timing each line. The Auto Subtitle Generator on File Tools Online skips both of those steps. There is nothing to download and nothing to install, whether you are on Windows, Mac, Android, or iPhone, you upload your video directly in your browser and get your subtitles back. For a quick, occasional captioning job, that is generally faster than opening dedicated software.
Because the Auto Subtitle Generator runs in your browser rather than as installed software, it works the same way on Windows, Mac, Chromebook, Android, and iPhone. There is nothing tied to one operating system, so you can generate subtitles for a video on whichever device you happen to have it on.
It listens to the spoken audio in your video and automatically generates matching subtitles, without you needing to type out a transcript yourself.
The exact output is set inside the tool's own interface and is not something we can confirm generally. If you specifically need captions burned into the picture, Add Subtitles to Video is confirmed to do that.
Generally accurate for clear speech, but automatic transcription can make mistakes with background noise, overlapping speakers, strong accents, or technical vocabulary. Review the result before publishing anything important.
No. This tool generates subtitles by listening to the video you upload, it does not search for or provide existing subtitle files for movies or shows.
The tool accepts common video formats such as MP4 and MOV. If your file is in a less common format, convert it first with the Video Converter, then generate subtitles from the result.
This is unconfirmed, check the tool directly. If it requires a video file, you can use a tool like Audio to Video Converter to prepare one first.
The full supported language list is set inside the tool itself, confirm your specific language against the live tool.
Yes. Upload your video to the Auto Subtitle Generator and get your subtitles, there is no cost to use it.
No. Upload your video and generate subtitles directly in your browser, no software installation required.
Yes. The tool runs in your browser, so it works the same way on Windows, Mac, Android, and iPhone without installing anything.
No. Your original upload is not altered, you receive your generated subtitles alongside it.
Your file is processed over HTTPS and automatically deleted from our servers within 30 minutes.
File Tools Online is a collection of free, browser based tools for working with audio, video, PDF, and image files, built for people who need a quick, reliable result without installing software. The Auto Subtitle Generator is one part of a larger set of video tools, so once your subtitles are ready, you can trim, compress, or convert your video using the other tools in the same toolkit.
Manually transcribing and timing a video's dialogue used to take real time and patience, and automatic speech recognition has made a usable first draft of subtitles available directly from a browser instead. Treating the result as a strong starting point, rather than a guaranteed-perfect final transcript, is generally the most realistic way to use any automatic captioning tool, this one included.