Closed Caption Converter API
From transcription through to delivery. Automate every step of your workflow with direct integrations to industry-leading platforms and services.
Trusted by broadcasters and streaming platforms worldwide
Automate your closed caption workflows
The Closed Caption Converter API eliminates the complexity of handling multiple subtitle formats in your workflow.
Whether you’re building a media platform, automating broadcast operations, or developing caption tools, our API handles the heavy lifting. Convert between industry-standard formats like SCC, MCC, and EBU-STL, correct timing drift, segment files for delivery, and decode caption data—all through simple REST calls.
No need to build and maintain your own conversion libraries or worry about format specifications. Just send us your files and get back exactly what you need, when you need it.
Read the documentation
Closed Caption Converter transformed our video production workflow. We process hundreds of hours of poker content every month, and manually handling captions was becoming a major bottleneck. Iconik automatically sends files to the API for transcription and caption sync, then delivers the completed files right back into our workflow. What used to take our team 3–4 hours of manual work per video now happens automatically in the background.
Colin Huse
Post Facility Manager, PokerGO
Everything you need to ship compliant captions
Eliminate manual caption work with automated conversion, custom QC validation, alignment, and simple API integration for any workflow.
Convert
Transform caption files seamlessly between 30+ different formats, including broadcast standards like SCC, MCC, EBU-STL, and streaming formats.
Conform
Ripple timecodes, convert frame rates, segment files, fix overlaps, and insert frame gaps to ensure perfect caption timing and formatting.
Automatic QC
Configure custom style guides to automatically detect reading rate errors, character limits, line counts, and content issues before broadcast.
Metadata
Read and modify file metadata including frame rates, author details, and technical specifications to match your workflow requirements precisely.
API & CLI
Automate caption workflows with our command-line interface for on-premise deployments and REST API for seamless cloud-based integrations.
Alignment & Sync
Automatically synchronize caption timing with video content through our API, ensuring perfect alignment for professional broadcast and streaming delivery.
Write your integration with an AI assistant
Using Claude, ChatGPT, Cursor, or GitHub Copilot? Give your assistant the full API reference as plain markdown (llms.txt) and a starter prompt, so it writes code against the real endpoints instead of guessing.
Seamless workflow integration
Connect your entire caption workflow with built-in integrations for media asset management, cloud storage, AI services, and edit tools.
Our API connectors eliminate manual file transfers and streamline your entire caption pipeline, from transcription through to delivery.
One engine, three ways to use it
Start with our simple web application for fast conversions, scale with our cloud API for automated processing and third-party integrations, or deploy our CLI for on-premise and offline processing.
Web Application
Need to convert a few caption files quickly? Our web application runs entirely in your browser with no downloads or uploads required. Your files stay secure on your device while processing happens locally—just select, convert, and download.
API
The most advanced closed caption API available, with features beyond conversion. Add transcription, machine translation, forced alignment/sync, and direct delivery to cloud storage and managed platforms such as Iconik.
CLI
Built for secure, on-premise environments where internet access is restricted. Available for Mac, Windows, and Linux. This single file executable is easy to deploy and manage using custom presets.
Ready to get started?
Sign up for a free 7-day trial of Closed Caption Converter and get 1:1 developer support and access to our video tutorials.
Start automating your closed caption workflows. Convert, conform, and deliver closed caption files in over 30 different formats.