SRT vs SUB — Comparison & Free Converter
Fast, instant SRT (SUBRIP) to SUB (MICRODVD) conversion. No signup required. Just drop your .srt file and get .sub in seconds.
Batch Settings
字幕，作为视频内容的得力助手，其格式多样，各有千秋。在华语地区，从影音爱好者到专业剪辑师，SRT和SUB这两种字幕格式都非常常见。SRT以其简洁明了的文本结构，易于编辑和分享而广受欢迎；而SUB格式，特别是MicroDVD SUB，则以其基于帧的精确时间戳，在特定场景下拥有不可替代的优势。我们深知转换过程中，保持时间轴的精准和文本内容的完整至关重要。本工具旨在为您提供一个高效、准确且操作便捷的SRT转SUB解决方案，让您的视频作品在不同平台和设备上都能完美呈现字幕，无论是观看体验还是后期制作，都能更加顺畅。
- 游戏精彩片段分享
- 教学视频多平台分发
- 老电影字幕适配
在部分老旧的影音播放器或特定嵌入式设备中，MicroDVD SUB格式因其轻量和帧级同步的特点，有时比SRT有更好的兼容性。
About SRT (SUBRIP) to SUB (MICRODVD) Conversion
SRT or SUB — which format should you use? The answer depends on your needs. Here's a quick breakdown.
SRT (SubRip) is the simplest subtitle format — plain text with timestamps. It has universal platform support. SUB is a widely used file format. It has common platform support.
So when should you convert SRT to SUB? This conversion is ideal when you When you need a SUB file. This conversion helps you convert between formats quickly.
Converting SRT to SUB maintains high quality with CocoConvert's optimised encoder settings.
If you've decided SUB is the right choice, CocoConvert makes the conversion effortless. Upload your .srt file, pick SUB, and click Convert — done in seconds. The converter runs on secure servers in Germany, powered by FFmpeg, Sharp, and qpdf. Files are encrypted via TLS and erased within 24 hours.
Free tier: 5 files/hour, 250 MB each. Pro: 100 files/hour, 5 GB each. Works in every modern browser on desktop and mobile.
How to Convert SRT (SUBRIP) to SUB (MICRODVD)
- 1
Choose your SRT file
Upload your .srt file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to SUB
Select .sub from the output options. The converter applies optimal quality settings automatically.
- 3
Run the conversion
Click Convert. Server-side processing means your device stays fast — even for large subtitle / caption files.
- 4
Get your SUB file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert SRT (SUBRIP) to SUB (MICRODVD)
Your SRT file is decoded and re-encoded as SUB.
Your SRT file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in SUB format
The converted file is ready for download
Format Comparison
SRT (SubRip)
.srt file
| Extension | .srt |
| MIME Type | application/x-subrip |
| Category | Subtitle / Caption |
SUB (MicroDVD)
.sub file
| Extension | .sub |
| MIME Type | text/x-sub |
| Category | Subtitle / Caption |
Should You Convert SRT (SUBRIP) to SUB (MICRODVD)?
When to Convert
- ✓When you need a SUB file
Frequently Asked Questions
Should I use SRT or SUB?
It depends on your goal. SRT preserves full quality. SUB preserves full quality. Choose based on whether file size or quality matters more for your use case.
Is SUB higher quality than SRT?
Not necessarily. Converting SRT to SUB maintains high quality with CocoConvert's optimised encoder settings. Quality depends on the compression type and settings, not just the format name.
Can I convert SRT to SUB on Mac and Windows?
Yes. CocoConvert is a web-based tool that works in all modern browsers — Chrome, Safari, Firefox, Edge — on any operating system including macOS, Windows, Linux, iOS, and Android.
Is CocoConvert free for SRT to SUB?
Yes. Free users get 5 conversions per hour (250 MB each). Pro subscribers unlock 100 files per hour, 5 GB per file, and priority processing.
What tools does CocoConvert use for SRT to SUB?
CocoConvert uses FFmpeg for audio/video, Sharp for images, and qpdf for documents — the same open-source libraries used by Netflix, YouTube, and major enterprise platforms.