Convert JSON to SRT

Convert JSON to SRT instantly in your browser — files never leave your device. 100% free, no signup, no software install.

By ChangeThisFile Team · Last updated: March 2026

Quick Answer

ChangeThisFile converts JSON subtitle data to SRT format instantly in your browser with no file upload. Transform API responses from speech-to-text services, automated transcription outputs, and structured dialogue data into standard SubRip subtitles for video platforms and accessibility compliance. Free, private, and works offline.

Free No signup required Files stay on your device Instant conversion Updated March 2026

Convert JSON to SRT

Drop your JSON file here to convert it instantly

Drag & drop your .json file here, or click to browse

Convert to SRT instantly

JSON vs SRT: Format Comparison

Key differences between the two formats

FeatureJSONSRT
Data structureFlexible nested objects and arraysSequential numbered subtitle blocks
Timecode formatVarious (milliseconds, seconds, ISO)HH:MM:SS,mmm format only
Text supportAny string data with escapingPlain text with basic HTML formatting
Use caseAPI responses, data exchangeVideo subtitle display
File sizeCompact with compressionHuman-readable text format
ParsingRequires JSON parserSimple text parsing by media players
MetadataCan include speaker, confidence, stylingTimecode and text only
Platform supportAll programming languagesUniversal video player support

When to Convert

Common scenarios where this conversion is useful

Speech-to-text API integration

Convert JSON responses from speech recognition APIs like Google Cloud Speech, Azure Cognitive Services, or AWS Transcribe into standard SRT subtitle files for video content.

Automated transcription workflows

Transform AI transcription outputs from services like Otter.ai, Rev, or Trint JSON exports into SRT files for video editing platforms and accessibility compliance.

Content platform API processing

Convert subtitle data from video platform APIs (YouTube, Vimeo, Wistia) or CMS systems into portable SRT files for cross-platform content distribution.

Translation service integration

Process JSON subtitle data from translation APIs or localization platforms into SRT format for multilingual video content delivery and international distribution.

Live streaming caption processing

Convert real-time transcription JSON from live streaming services into SRT files for post-broadcast accessibility and content archiving requirements.

Who Uses This Conversion

Tailored guidance for different workflows

For Developers

  • Convert JSON responses from Google Cloud Speech, Azure Cognitive Services, or AWS Transcribe APIs into SRT files for video applications
  • Transform automated transcription data from your application APIs into standard subtitle format for content management systems
  • Process real-time speech recognition JSON streams into SRT files for live captioning and accessibility workflows
Validate your JSON structure against expected subtitle schema before conversion to catch API response changes
Handle confidence scores and speaker identification in your JSON to create more accurate and accessible subtitles

For Content Platforms

  • Convert user-uploaded transcription JSON from various AI services into standardized SRT format for consistent video platform integration
  • Transform automated caption data from video processing pipelines into SRT files for multi-platform content distribution
  • Process bulk transcription JSON exports from content creation tools into subtitle files for accessibility compliance
Implement quality checks on timing accuracy before deploying converted subtitles to production video content
Preserve metadata like speaker names and confidence scores when possible for enhanced accessibility features

For AI/Transcription Services

  • Convert your service's JSON transcript outputs into industry-standard SRT format for seamless client video workflows
  • Transform multi-language transcription JSON into separate SRT files for international content localization projects
  • Process batch transcription results from podcast or meeting recordings into subtitle files for video repurposing
Ensure timestamp precision in your JSON output for accurate subtitle synchronization in video content
Include speaker attribution and confidence metrics in JSON structure for enhanced subtitle quality and user control

How to Convert JSON to SRT

  1. 1

    Prepare your JSON file

    Ensure your JSON contains subtitle objects with timestamp and text properties. Common formats include arrays of subtitle objects or nested transcription data.

  2. 2

    Drop your JSON file

    Drag and drop your JSON file onto the converter, or click to browse. The parser auto-detects subtitle data structure and converts instantly.

  3. 3

    Download the SRT file

    Click Download to save your converted SRT subtitle file, ready for use in video editors, media players, and accessibility workflows.

Frequently Asked Questions

The JSON should contain subtitle objects with timestamp and text fields. Common formats include: [{"start": 0, "end": 5.2, "text": "Hello world"}] or transcription API responses with segments array containing time and text data.

Yes. The converter recognizes JSON formats from Google Cloud Speech, Azure Cognitive Services, AWS Transcribe, and other major speech-to-text APIs. It automatically extracts timing and text data from their response structures.

No. The JSON to SRT conversion happens entirely in your browser using JavaScript. Your API data and transcription files never leave your device, ensuring complete privacy for sensitive content.

The converter automatically detects timestamp formats in your JSON (milliseconds, seconds, ISO format) and converts them to the standard SRT timecode format (HH:MM:SS,mmm). Floating-point seconds are supported.

Yes, if your JSON contains speaker or channel information, the converter can format it as '[Speaker Name]: dialogue' in the SRT output, which is standard for accessibility and multi-speaker content.

Most AI transcription services support JSON export: Otter.ai, Rev, Trint, Happy Scribe, Descript, and others. The converter handles various JSON schemas from these platforms automatically.

Confidence scores from speech recognition APIs are preserved as metadata but not included in the SRT output. Low-confidence segments can be marked with brackets or filtered based on threshold values if present in the JSON.

Yes. The converter can extract subtitle data from nested JSON structures, including transcription responses with segments, alternatives, words arrays, and hierarchical speaker data from various API providers.

Yes, if your JSON contains word-level timing data, the converter can generate subtitle segments based on word boundaries, sentence breaks, or custom timing intervals for fine-grained subtitle control.

Since conversion happens in your browser, the limit depends on your device's memory. Most transcription JSON files (even for feature-length content) are under 10MB and convert instantly without performance issues.

Currently, the converter processes one JSON file at a time. For batch processing, you can convert files individually or combine multiple transcription JSON files into a single file before conversion.

Yes, the generated SRT files follow standard SubRip format and are compatible with YouTube, Vimeo, Facebook, TikTok, video editing software, and any platform that supports SRT subtitle uploads.

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