Pricing
$0.50 / actor start
Captions Generator - TikTok, Youtube, Instagram, Shorts, Final Cut Pro, davinci resolve, Premiere Pro, CapCut, elevenlabs. Simply input your existing Sound source: mp4, MOV, mp3, webm + others and customize the caption color & settings and generate. Output can be original clip or transparent overlay
inputUrlstringRequired
Upload a file or provide a URL to audio/video (mp3, wav, m4a, flac, mp4, webm, mov, mkv). Uses Whisper medium model for accurate transcription.
inputTypeEnumOptional
Type of input media
"audio": string"video": stringDefault value of this property is "video"
outputTypeEnumOptional
Generate a transparent overlay (captions only with TRANSPARENT background + audio) or burn captions onto the input video. Note: Transparent overlay requires WebM or MOV format.
"transparentOverlay": string"captionedVideo": stringDefault value of this property is "transparentOverlay"
outputFormatEnumOptional
Video format for output. For TRANSPARENT overlays, use WebM or MOV. For burned captions, MP4 works fine. Note: MP4 does NOT support transparency.
"mp4": string"webm": string"mov": stringDefault value of this property is "mp4"
resolutionobjectOptional
Video resolution (width x height). Common: 1080x1920 (vertical), 1920x1080 (horizontal), 1080x1080 (square)
whisperLanguageEnumOptional
Language code for transcription (auto for automatic detection, or: en, es, fr, de, it, pt, ru, zh, ja, ko, ar, hi, etc.)
"auto": string"en": string"es": string"fr": string"de": string"it": string"pt": string"ru": string"zh": string"ja": string"ko": string"ar": string"hi": stringDefault value of this property is "auto"
useAIEnhancementbooleanOptional
Use Claude AI to intelligently group and enhance captions for better readability (recommended). Requires ANTHROPIC_API_KEY environment variable.
Default value of this property is true
customCaptionsstringOptional
Provide your own caption text instead of auto-transcription. The AI will align this text with the audio timing while preserving word emphasis and capitalization.