How to Export SRT Subtitles from Audio on iPhone (2026)
Generate accurate SRT subtitle files from any voice recording on iPhone — ready to upload to YouTube, TikTok, or any video editor.
SRT (SubRip Subtitle) files are the universal format for adding captions to videos. Whether you're a YouTuber, TikTok creator, or corporate video producer, generating SRT subtitles from audio on your iPhone used to require expensive desktop software. In 2026, Aero VoiceNotes makes it a 3-step process on your phone.
What is an SRT File?
An SRT file is a plain text file that contains timed subtitle entries. Each entry includes a sequence number, a timestamp (start → end), and the text to display. YouTube, Vimeo, TikTok, Instagram, and every major video editor accept SRT files for adding captions.
A typical SRT entry looks like this:
1 00:00:02,500 --> 00:00:05,800 Hello and welcome to today's tutorial. 2 00:00:06,100 --> 00:00:09,300 Today we'll cover how to generate SRT files from audio on iPhone.
How to Generate SRT Subtitles on iPhone with Aero VoiceNotes
- Record or import your audio. Open Aero VoiceNotes and tap the microphone to record, or tap Import to upload an existing audio file (MP3, WAV, M4A, AAC, OGG, or FLAC).
- Wait for transcription. Aero VoiceNotes transcribes your audio with Whisper AI. Processing is typically 30–120 seconds. The transcript includes word-level timestamps, which are used to generate the SRT file.
- Export as SRT. Open the transcript, tap the Export / Share button, and select SRT as the format. The SRT file is saved to your iPhone and ready to use.
Pro tip: SRT export includes precise word-level timestamps, so captions sync accurately even for fast speech. No manual correction needed for most recordings.
How to Add SRT Subtitles to YouTube
- Go to YouTube Studio → Subtitles.
- Select your video and click Add Language.
- Click Add under Subtitles, then choose Upload file.
- Select your exported SRT file. YouTube automatically syncs it to your video.
How to Add SRT Subtitles to TikTok and Instagram
TikTok and Instagram Reels both support SRT uploads in their desktop editors, or you can use a third-party video editor (CapCut, DaVinci Resolve) to burn the subtitles directly into the video:
- Import your video and SRT file into CapCut on your iPhone.
- CapCut reads the SRT file and positions captions automatically.
- Export the video with burned-in captions — no separate SRT file needed when uploading to social apps.
SRT vs VTT: Which Format Should You Use?
| Format | Best For | Notes |
|---|---|---|
| SRT | YouTube, video editors, most platforms | Universal compatibility. Most widely supported. |
| VTT | Web video players (HTML5) | Supports styling. Less compatible with desktop editors. |
For most use cases, SRT is the right choice. Aero VoiceNotes exports SRT. If you need VTT for a web player, SRT files can be converted to VTT with any free online converter.
Frequently Asked Questions
How accurate are the timestamps in the SRT file?
Aero VoiceNotes generates word-level timestamps using Whisper AI. Timestamp accuracy is typically within 0.2 seconds for clear audio. Background noise and overlapping speech can reduce accuracy.
Can I generate SRT subtitles in Turkish or other languages?
Yes. Aero VoiceNotes generates SRT files in the original language of the audio — Turkish, English, German, Spanish, French, and 9 other languages are supported. You can also translate the transcript first and then export the translated text as an SRT file.
What's the maximum audio length for SRT export?
Aero VoiceNotes handles recordings up to 6 hours. For very long recordings, transcription may take a few minutes. The SRT file will cover the full duration with correct timestamps.
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