captly.dev is an AI-powered video subtitle API that burns subtitles directly into your videos. Using GPU-accelerated processing and automatic speech recognition, it typically processes videos in 2-5 minutes with professional-quality results.

How does the subtitle API work?

Simply upload your video via our REST API with your chosen template. Our system automatically transcribes the audio using AI speech recognition, then burns professional subtitles directly into the video. You receive a download URL when processing is complete.

What video formats are supported?

captly.dev supports MP4 and MOV video formats up to 500MB in size. Output videos are delivered in MP4 format with the original quality maintained.

How long does video processing take?

Most videos are processed in 2-5 minutes thanks to our GPU-accelerated infrastructure. Processing time may vary based on video length and current queue load.

Can I customize the subtitle appearance?

Yes! captly.dev offers 12 professional templates and full CSS customization. You can customize colors, fonts, animations, positioning, and more through our css_overrides and settings_overrides parameters.

No, credits never expire. Once purchased, your minutes remain available in your account until used. You can also purchase multiple packs and minutes are cumulative.

Is there an API for getting subtitle data?

Yes, you can retrieve the raw subtitle JSON with word-level timing data via the GET /api/jobs/{job_id}/subtitles endpoint. This is useful for custom integrations or analytics.

What programming languages can I use with the API?

captly.dev is a REST API that works with any programming language that can make HTTP requests. We provide code examples in cURL and Python, but you can use JavaScript, Node.js, PHP, Ruby, Go, Java, or any other language.

captly.dev - AI-Powered Video Subtitle API

Burn subtitles into videos with our GPU-accelerated API. Automatic speech recognition, 12 professional templates, full customization. Typical processing in 2-5 minutes.

Features

Simple Integration - Upload your video, get processed video back with subtitles
Fast Processing - GPU-accelerated, most videos completed in 2-5 minutes
Production-Ready - Secure API key authentication with reliable infrastructure
12 Professional Templates - Minimalist, Vibrant, Hype, Explosive, and more
Full Customization - CSS and settings overrides for complete control
Word-Level Timing - Get subtitle JSON with precise timing data

Pricing

Starter Pack: $8.99 for 100 minutes
Growth Pack: $39.99 for 500 minutes (Most Popular)
Pro Pack: $69.99 for 1000 minutes
Enterprise: Custom pricing for high-volume needs

How It Works

Get your API key from the dashboard
Upload your video file with POST /api/videos/upload
Check job status with GET /api/jobs/{job_id}
Download your video with burned-in subtitles

Frequently Asked Questions

What video formats are supported?: MP4 and MOV formats up to 500MB in size.
How long does processing take?: Most videos are processed in 2-5 minutes with GPU acceleration.
Do credits expire?: No, credits never expire. Purchase once, use anytime.

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