Free SRT Generator
Create Subtitle Files Online
Upload any audio or video file and download a ready-to-use SRT subtitle file in seconds. Works with YouTube, Premiere Pro, DaVinci Resolve, and any video editor.
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MP3 · MP4 · WAV · M4A · OGG · WEBM · FLAC · Max 25MB
YouTube-ready SRT
Upload the .srt file directly to YouTube Studio to add captions to your videos. Timestamps are synced automatically.
Accurate timecodes
Every subtitle segment gets a precise HH:MM:SS,ms timestamp — the standard format used by all professional video tools.
50+ languages
Generates SRT files in any language — English, Spanish, French, German, Japanese, and 46 more. Language is detected automatically.
Frequently asked questions
What is an SRT file?
An SRT (SubRip Subtitle) file is a plain-text file containing timestamped subtitle entries. Each entry has a sequence number, a start → end time, and the subtitle text. SRT is the most widely supported subtitle format.
How do I generate an SRT file from a video?
Upload your video or audio file above. Mictoo transcribes it and adds timestamps to every segment. After transcription, click the .srt button to download your subtitle file.
How do I add SRT captions to a YouTube video?
In YouTube Studio, open your video and click Subtitles. Select Add Language, then Upload file and choose your .srt file. YouTube syncs the captions automatically.
Does the SRT file work in Premiere Pro and DaVinci Resolve?
Yes. In Premiere Pro: File → Import → select your .srt file. In DaVinci Resolve: open the Edit page, go to File → Import Subtitle, and select the .srt file.
Is the SRT generator really free?
Yes, completely free. No account, no subscription, no watermarks. Upload your file and download the SRT — that's it.
What is the maximum file size for SRT generation?
Up to 25 MB. For longer videos, extract the audio track first to reduce file size, or split the video into shorter segments.
Can I generate SRT from audio files (MP3, WAV)?
Yes. Mictoo generates SRT files from any audio or video format: MP3, MP4, WAV, M4A, OGG, WEBM, FLAC.
Can I edit the subtitles before downloading?
Yes. After transcription, you can edit the text in the browser before downloading. The timestamp structure is preserved in the exported SRT file.
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