CaptionForge: Subtitle Maker

BigSSystems

Contains ads

About this app

Turn the speech in a video into subtitles, translate them into another language, and save a new video with the subtitles on it – all on your Android phone. Speech recognition, translation and saving all happen on the phone, so your video is never uploaded.

Free, with no account and no sign-up. No watermark on your videos. No subscription and no in-app purchases – the app is paid for by ads.

FOR PERSIAN (FARSI) TOO
• Turn Persian speech into Persian subtitles
• Translate English, Arabic or Turkish videos into Persian subtitles, or Persian into other languages
• Save the video with the Persian subtitles fixed onto the picture (hardsub), or show Persian and the original language together

WHAT IT DOES
• Makes subtitles from speech in 35 languages, using Whisper speech recognition that runs on your phone
• Translates the subtitles into any of the 35 languages – for example English to Persian, or Spanish to English
• Shows both languages together if you like: on the video, or in one subtitle file
• Lets you correct any word and change when each line appears and disappears
• Saves a new MP4 video with the subtitles fixed onto the picture (often called burned-in subtitles), or a separate SRT subtitle file
• Works with MP4 video and MP3 audio

WORKS WITHOUT INTERNET
Speech recognition and translation run on your phone. The internet is only needed once, to download the speech and translation models, and to show ads. After that, making, translating and saving subtitles works offline.
• The basic speech model is about 75 MB. Higher quality levels are more accurate, but they are bigger downloads, take longer and need a more powerful phone.
• Basic translation is a small download per language. Better translation uses larger open-source models.

YOUR PRIVACY
Your video, audio and subtitles never leave your phone. The app is free and shows ads. The ad networks use a device ID, approximate location and how the app is used – this is what the Data safety section lists. You can watch one ad to turn ads off for 24 hours.

HOW YOUR SUBTITLES LOOK
• Show the full line, one word at a time, or the full line with each word highlighted as it is spoken
• Choose the font, text size and colour, outline, background, bold, italic and underline
• Drag the subtitle to where you want it on the video
• Noise reduction makes speech easier to recognise in noisy videos (unlocked by watching an ad)

LANGUAGES
Arabic, Belarusian, Bulgarian, Chinese, Croatian, Czech, Danish, Dutch, English, French, German, Greek, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Korean, Macedonian, Norwegian, Persian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swedish, Thai, Turkish, Ukrainian and Vietnamese.
Translation between two languages that are not English goes through English.

GOOD FOR
Social media clips, lessons and lectures, interviews, presentations, family videos, and understanding videos in a language you don't speak.

What’s new

Stability and performance improvements.