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- Language translation
Offline AI subtitle generator, captions & text to speech. Private, no upload.
Video Caption Adder – AI Auto Captions, Subtitles & Voiceover Video Editor Turn any video into a caption-ready, multi-language masterpiece — right on your phone! Video Caption Adder is the all-in-one AI video editor for auto captions, subtitles, voiceovers & translation. No internet, no cloud uploads, no waiting — everything runs 100% on-device for total speed & privacy. AI AUTO CAPTIONS & SUBTITLES • Auto-generate accurate captions from any video's audio using on-device AI speech recognition • Auto-detect the spoken language or choose from 30+ languages manually • Translate captions to English instantly — perfect for reels, vlogs & multilingual content • Word-level timing keeps captions perfectly in sync with speech • Detect different speakers automatically for interviews, podcasts & multi-person videos • Export captions as burned-in (hardcoded) video or as a standalone SRT file AI TEXT-TO-SPEECH VOICEOVER • Add natural-sounding AI voiceovers in 8+ languages including English, Spanish, French, Hindi, Italian, Portuguese, Japanese & Chinese • Choose from 50+ unique AI voices — male, female & regional accents • Voiceover audio stays perfectly synced with your video timeline • Great for tutorials, product demos, faceless YouTube/TikTok/Reels content & audiobooks FULL CAPTION CUSTOMIZATION • Animated caption styles — Classic, Pop & Karaoke word-highlight effects • 12+ premium fonts: bold, sci-fi, playful, minimal & more • Full color picker + outline/stroke controls for perfect readability • Auto-emoji insertion adds personality to your captions automatically • Save your favorite look as a reusable style template for one-tap styling next time POWERFUL VIDEO EDITING TOOLS • Trim & cut clips with precision • Auto-remove silence & dead air for tighter, faster-paced videos • Crop to any aspect ratio — 9:16 for Reels/Shorts/TikTok, 1:1 for feed posts, 16:9 for YouTube • Add a watermark or logo overlay to protect & brand your content • Mix in background music with automatic audio ducking under voiceover & speech • Full undo/redo support so you can experiment worry-free PRIVATE & OFFLINE BY DESIGN • Speech-to-text, translation, text-to-speech & speaker detection all run locally on your device • Your videos, audio & captions never leave your phone — no account, no sign-up, no cloud storage required • Fast exports powered by an on-device video processing engine WHY CREATORS LOVE VIDEO CAPTION ADDER • Boost engagement & watch-time with auto-captioned, accessible videos • Save hours vs. manual subtitle typing or paying a captioning service • One app for captions + subtitles + voiceover + translation + editing — no need to juggle multiple tools • Works great for content creators, marketers, educators, podcasters & social media managers PERFECT FOR: Instagram Reels • TikTok • YouTube Shorts & long-form • Facebook Video • Podcasts & interviews • Course & tutorial videos • Product demos • Multilingual audiences Download Video Caption Adder today & start creating scroll-stopping, caption-perfect videos — fast, free & fully offline!