Auto Video Subtitle Generator

Auto Subtitle is an AI caption maker and automatic subtitle generator for Android. It turns a Reel or any short video into styled, burned-in captions in a few taps, right on your phone. Import a clip, let cloud AI transcribe the speech, style the words on a live preview, then export an MP4 with the captions already on the picture.

WHY CAPTIONS MATTER
Most short videos are watched on mute. Auto captions keep viewers reading, lift watch time, and make your Reels accessible to everyone. Typing subtitles by hand takes longer than filming the clip. Auto Subtitle transcribes for you and keeps every word in sync with the audio.

WHAT YOU CAN DO
• Auto captions from speech — cloud AI transcription with a smart fallback engine, so your video gets subtitles even when one service is busy
• 100+ languages — English, Bengali, Hindi, Tamil, Telugu, Marathi, Urdu, Spanish, Arabic, French, Portuguese, Japanese and many more, or simply use Auto detect
• Karaoke word highlight — the active word lights up as it is spoken, the caption style that keeps eyes on the screen
• Three caption looks — Karaoke, Pop, and Minimal, each tuned for vertical video
• Caption plates — None, Rounded, Box, Band, or per-word plate in Black, Purple, Teal, or White with an opacity slider
• Position, size, and layout — move captions from bottom to top, set font size, choose words per line, add a soft shadow
• Custom fonts — upload your own TTF or OTF font and keep your brand look
• Caption editor — fix a name, slang, or a missed word before you export
• Video trim — cut the clip to the part you want, or save the trimmed clip to your gallery
• Colour edit — adjust saturation, brightness, and contrast on the live preview
• Burn and export — hard-burned subtitles inside the MP4, saved to your gallery
• Share from the app — send the finished video to your usual apps
• Projects — every video is saved as a project with autosave, so you can come back and finish later

HOW IT WORKS
1. Tap Create new and import a video from your phone
2. Choose a language or leave Auto detect on
3. Tap Add Subtitle to generate AI captions
4. Pick Karaoke, Pop, or Minimal and tweak plates, position, and size on the live preview
5. Burn and export, then share

WHO IT IS FOR
Creators who want readable captions without a long edit. Small businesses posting product demos and voiceover ads. Teachers, vloggers, street-food reviewers, and anyone who needs Bengali, Hindi, or other language subtitles on a phone.

FREQUENTLY ASKED QUESTIONS

Is Auto Subtitle free?
Yes. The app is free to download and use. Free exports include a small moving watermark. You can remove it for a video by watching a short rewarded ad. There is no subscription and no paid tier.

Does the AI caption generator work offline?
No. Transcription runs on cloud AI, so you need an internet connection to generate captions. Editing, styling, trimming, and exporting your saved projects work on the device.

How long can my video be?
You can import clips up to 3 minutes. Transcription follows the in-app limit shown when you import, so trim the clip first to keep the part you want captioned.

Which languages are supported?
More than 100, including English, Bengali, Hindi, Tamil, Telugu, Gujarati, Marathi, Punjabi, Urdu, Nepali, Arabic, Spanish, French, German, Portuguese, Japanese, Korean, and Chinese. Auto detect picks the language for you.

Can I edit the captions the AI writes?
Yes. Open the Text tab, tap any line, and change the words. Tap a line to jump the video to that moment.

Are the subtitles part of the video?
Yes. Auto Subtitle hard-burns the captions into the exported MP4, so they show on every app and player with no separate subtitle file.

Do I need an account?
No sign-up and no login are required.

Auto Subtitle is a video caption app, auto subtitle generator, and karaoke caption maker for Reels and short videos on Android. Add captions to video, generate subtitles automatically, and export burned-in text in minutes.