Convert MP4 to SRT Online — Free Subtitle Converter

Upload an MP4 video and get a ready-to-use SRT subtitle file in minutes. Completely free — no account, no signup, no subscription.

Need to convert an MP4 to SRT? This free online subtitle converter listens to the speech in your video and generates a properly timed SRT subtitle file you can use straight away. SRT files work with YouTube, Vimeo, Adobe Premiere, DaVinci Resolve, VLC, and virtually every other video platform or editor. Prefer a plain transcript? The same upload can also convert your MP4 to text, so you get both subtitles and a clean written transcript from one file.

It is completely free — no card, no account, no payment. Up to 5 transcriptions per day, 60 minutes total daily limit. There's no software to install.

How to convert MP4 to SRT

Go to the FreeToTranscribe homepage and upload your MP4 file.
The AI transcribes the speech and generates timed subtitles.
No payment, no account — it's completely free.
Download your SRT file (plus VTT, TXT, or RTF if you need them too).

What is an SRT file?

An SRT (SubRip Text) file is a plain text file that pairs each line of dialogue with a start and end timestamp. It looks like this:

1
00:00:04,200 --> 00:00:07,100
Welcome to the presentation.

2
00:00:07,500 --> 00:00:10,300
Today we'll cover three main topics.

SRT is the most widely supported subtitle format. If you're unsure which format to use, SRT is almost always the right choice.

Where can I use my SRT file?

YouTube — upload as a subtitle track; far more accurate than auto-captions.
Adobe Premiere / DaVinci Resolve — import directly as a caption track.
Vimeo — add captions to any video in your account.
VLC / media players — place the SRT file in the same folder as the video.
CapCut / social editors — import as subtitles for short-form content.

SRT files produced by FreeToTranscribe are compatible with every major platform that accepts subtitle uploads including YouTube, Vimeo, Facebook Video and LinkedIn. Upload the SRT file in the closed captions section of your video settings and the platform will sync the text to the playback timeline automatically.

Convert MP4 to SRT free →

Frequently asked questions

How long does the MP4 to SRT conversion take?

Most videos are processed in roughly the same time as the audio duration — a 10-minute video takes around 10 minutes. Shorter files are often faster.

Is there a file size limit?

Files up to 1GB are supported, with a 60-minute daily limit across your transcriptions. Longer files are trimmed to 60 minutes.

Can I get VTT instead of SRT?

Yes. After transcription you can download SRT, VTT, TXT, or RTF — all from the same transcription.

What if my video has multiple speakers?

The transcription captures all speech from every speaker. Speaker labels are not currently separated into individual turns, but all dialogue is included with accurate timestamps — you can label speakers manually in the downloaded SRT file.

Do I need to pay or create an account?

No. It's completely free — no account, no login, no payment. Just upload and download.