Convert JSON to SRT
Drag & drop your .json file here, or click to browse
Converts to SRT Subtitles on secure servers · first daily conversion free · no signup
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Convert JSON transcript data to SRT subtitles securely online. No signup; encrypted transfer and automatic deletion after server-side processing.
By ChangeThisFile Team · Last updated: March 2026
ChangeThisFile converts timestamped JSON transcript data to SRT subtitles in seconds. The current route uses secure server-side processing, with encrypted transfer and automatic deletion after conversion. It maps structured caption text and timing into widely supported SubRip cues. Free with no signup required.
JSON vs SRT Subtitles: Format Comparison
Key differences between the two formats
| Feature | JSON | SRT |
|---|---|---|
| Data structure | Flexible nested objects and arrays | Sequential numbered subtitle blocks |
| Timecode format | Various (milliseconds, seconds, ISO) | HH:MM:SS,mmm format only |
| Text support | Any string data with escaping | Plain text with basic HTML formatting |
| Use case | API responses, data exchange | Video subtitle display |
| File size | Compact with compression | Human-readable text format |
| Parsing | Requires JSON parser | Simple text parsing by media players |
| Metadata | Can include speaker, confidence, styling | Timecode and text only |
| Platform support | All programming languages | Universal 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
Video Editors & Subtitlers
- Convert JSON caption files to SRT for the subtitle track your editor or delivery spec requires
- Move JSON subtitles into SRT to hand off to an editor working in a different tool
Content Creators & YouTubers
- Convert JSON captions to SRT to upload alongside your video on YouTube, Vimeo, or social platforms
- Turn a JSON caption file into SRT to make your video clearer and more accessible
Accessibility & Localization Teams
- Convert JSON subtitles to SRT to meet the caption format an accessibility or compliance spec requires
- Prepare JSON captions as SRT to hand to translators or a localization workflow
How to Convert JSON to SRT Subtitles
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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.
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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.
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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.
Convert JSON to SRT Subtitles via API
Integrate this conversion into your pipeline with 3 lines of code. Free tier: 25 conversions/month.
curl -X POST https://changethisfile.com/v1/convert \ -H "Authorization: Bearer YOUR_API_KEY" \ -F "file=@input.json" \ -F "target=srt" \ -o output.srt --fail
YOUR_API_KEY with your free key — no credit card needed.
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.
Yes. The current JSON-to-SRT route uses server-side processing. Files travel over an encrypted connection and are automatically deleted after conversion.
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.
The current server-side converter enforces the service upload limit. Most transcript JSON files are small, but split unusually large exports before conversion if they exceed that limit.
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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