Free SRT Subtitle Generator
Upload audio and get a timestamped .srt subtitle file generated by AI — accurate timings, proper line breaks, ready for any video editor or platform.
Free · No signup · 3 uses per day
How it works
- 1Upload your audio file (up to 25MB free). Have a video? Extract the audio first with our free MP4 to MP3 converter.
- 2AI transcribes with word-level timestamps and builds properly timed SRT cues with automatic language detection.
- 3Preview and download your .srt file. A free account unlocks full-length files, VTT export, and burned-in animated captions in 50+ styles.
Frequently asked questions
What is an SRT file?
SRT (SubRip Subtitle) is the universal subtitle format: numbered cues with start/end timestamps and text. Every major platform and editor accepts it — YouTube, Premiere, DaVinci, CapCut, VLC.
Is this SRT generator free?
Yes — 5 files per day free with no signup (preview covers the first 90 seconds). A free Atomiser account (no card) unlocks full-length SRT/VTT exports with 30 monthly credits.
How accurate are the subtitle timings?
Timestamps are word-level from the AI transcription engine, grouped into readable cues. For clear speech, timings are broadcast-grade accurate.
Can I generate subtitles in languages other than English?
Yes — language is auto-detected with 20+ languages supported, including Hindi, Spanish, Portuguese, French and German.
Can I burn the subtitles directly onto my video?
That’s what Atomiser does best — animated captions in 50+ styles burned into your video, plus clips, thumbnails and repurposed posts from the same upload.
More free tools
One video. Everything else.
This tool is one piece of Atomiser: upload once and get clips, captions, thumbnails, transcripts, show notes and social posts — published to 8+ platforms.
Start Free — 60 Credits/Month