Trusted by 10,000+ creatorsInstagram Reels subtitle generator
No account required. Start in seconds.
Caption your Reels, ready to share
AutoSubtitles adds subtitles to Instagram Reels automatically. It transcribes your clip with AI, styles the captions for vertical video, and exports a 9:16 MP4 ready to share. No account needed to start.
Why creators choose AutoSubtitles
Total control over every caption
Customize every detail: fonts (upload your own with Pro), colors, outline, shadow, background, casing, spacing, alignment, position, and animation. Or start from 28 presets.
Renders in your browser, fast
No waiting to upload your video to a server and no render queue. It stays on your device and captions render right in your browser, so you get your captioned video in seconds.
Viral animated captions
Word-by-word animations and karaoke highlighting in bold, readable styles built for TikTok, Reels, and Shorts.
Export however you need
Download a captioned video with burned-in subtitles on any plan. With Pro, also export SRT, VTT, and TXT files to use anywhere.
Translate into 30+ languages
Translate your captions into 30+ languages with AI while keeping the timing intact.
Free to use, private
Use it free; a paid plan unlocks more. Your video file never leaves your device; only the audio is sent for transcription, then deleted.
Features
Built for vertical
Export 9:16 video sized right for Reels, plus other aspect ratios.
Reel-ready styles
Bold, legible caption presets that read well on a phone.
AI transcription
Captions are generated for you, then you edit any line.
Quick to publish
Caption and export in minutes without a heavy editor.
Made for Reels creators, brands, and repurposers.
Reels creators
Caption every Reel so it works with the sound off.
Brands
Keep Reels captions on brand and accessible across campaigns.
Repurposers
Turn long videos into captioned Reels in minutes.
How it works
- Step 1
Upload your Reel
Drop in your vertical clip or any aspect ratio.
- Step 2
Auto-generate subtitles
AI transcribes the audio into captions in seconds.
- Step 3
Style for Reels
Choose a preset or customize fonts, colors, and position.
- Step 4
Export 9:16
Render a vertical MP4 with subtitles burned in.
Free vs Pro
Start free, upgrade only if you need more.
| Capability | Free | Pro |
|---|---|---|
| Vertical 9:16 export | Yes | Yes |
| Reel-ready caption styles | 28 presets | 28 presets |
| AI subtitle generation | Yes | Yes |
| Editable text and timing | Yes | Yes |
| Export captioned video | Yes | Yes |
| Animations and word highlights | Yes | Yes |
| No watermark | No | Yes |
| HD and 4K export | No | Yes |
| AI translation | No | Yes |
| Custom fonts | No | Yes |
| SRT, VTT and TXT download | No | Yes |
No account required. Start in seconds.
Frequently asked questions
- How do I add subtitles to an Instagram Reel?
Upload your Reel to AutoSubtitles, generate captions with AI, style them for vertical video, and export a 9:16 MP4 with the subtitles burned in, ready to share on Instagram.
- Is it free to subtitle Reels?
Yes. Generating, editing, styling, and exporting subtitles is free with no signup, with every preset included. Free exports have a small watermark. Pro removes it and adds HD and 4K export and custom fonts.
- Does it export the right size for Reels?
Yes. You can export 9:16 vertical video for Reels, plus other aspect ratios if you need them.
- Can I match my brand style?
Yes. You can customize fonts, colors, outlines, and position, and on the Pro plan upload your own fonts and save presets.