SUB to SRT — Format Comparison & Online Converter
Fast, instant SUB (MICRODVD) to SRT (SUBRIP) conversion. No signup required. Just drop your .sub file and get .srt in seconds.
Batch Settings
还在为视频字幕格式不对头而烦恼吗？尤其是那些老旧的SUB文件，在手机上、平板上播放时，常常出现乱码、不同步，甚至根本不显示字幕，让您错过精彩对白。无论是追剧、看电影，还是分享游戏录像，字幕的流畅显示都至关重要。SUB格式虽然曾经流行，但如今已逐渐被更通用、兼容性更好的SRT格式取代。SRT不仅支持更多播放器和设备，还方便编辑和分享。我们深知您在转换时遇到的不便，因此特别推出这款工具，旨在帮助您轻松将SUB字幕转换为SRT，让您的观影和分享体验无缝衔接，不再被技术问题困扰，尽享清晰流畅的字幕。
- 微信分享自制短片
- Switch游戏录像配字幕
- 老电影资源字幕适配
在大陆和台湾地区，许多早期通过P2P网络或光盘传播的影视资源，其字幕文件常为SUB格式。转换为SRT后，更便于在主流播放器如PotPlayer、MX Player或各类手机影音APP中正确显示和调整。
About SUB (MICRODVD) to SRT (SUBRIP) Conversion
SUB and SRT (introduced 2000) are both subtitle / caption formats, but they differ in important ways. SUB is a widely used file format. SRT (SubRip) is the simplest subtitle format — plain text with timestamps.
When you convert SUB to SRT, the goal is to convert between formats quickly. Converting SUB to SRT maintains high quality with CocoConvert's optimised encoder settings. Understanding these technical differences helps you choose the right format for your workflow.
Your SUB file is decoded and re-encoded as SRT. The conversion involves 4 steps: (1) your sub file is uploaded and validated, (2) the file is decoded (parsed into its raw data), (3) the data is re-encoded in srt format, (4) the converted file is ready for download.
CocoConvert's converter handles the entire pipeline server-side using FFmpeg, Sharp, and qpdf — battle-tested libraries used by streaming platforms and enterprise tools. Files are encrypted in transit and deleted within 24 hours.
This conversion is ideal when you When you need a SRT file. For the opposite direction, CocoConvert also supports SRT to SUB conversion.
How to Convert SUB (MICRODVD) to SRT (SUBRIP)
- 1
Upload .sub file
Select your SUB file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .srt
Set SRT as the output format. The converter uses optimal settings based on the SUB→SRT conversion profile.
- 3
Convert
The server-side engine decodes your SUB file and re-encodes it as SRT. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .srt file. Multiple output files can be downloaded together.
What Happens When You Convert SUB (MICRODVD) to SRT (SUBRIP)
Your SUB file is decoded and re-encoded as SRT.
Your SUB file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in SRT format
The converted file is ready for download
Format Comparison
SUB (MicroDVD)
.sub file
| Extension | .sub |
| MIME Type | text/x-sub |
| Category | Subtitle / Caption |
SRT (SubRip)
.srt file
| Extension | .srt |
| MIME Type | application/x-subrip |
| Category | Subtitle / Caption |
Should You Convert SUB (MICRODVD) to SRT (SUBRIP)?
When to Convert
- ✓When you need a SRT file
Frequently Asked Questions
What is the difference between SUB and SRT?
SUB is a widely used file format. SRT (SubRip) is the simplest subtitle format — plain text with timestamps.
Does SUB to SRT conversion affect quality?
Converting SUB to SRT maintains high quality with CocoConvert's optimised encoder settings.
Which format has better compression, SUB or SRT?
SUB is a common subtitle / caption format. SRT uses none compression. The better choice depends on whether you prioritize file size or quality.
How long does SUB to SRT conversion take?
Most conversions finish in seconds. Larger files or complex subtitle / caption content may take 10–30 seconds. CocoConvert processes files in parallel for batch jobs.
Is SUB or SRT better for long-term storage?
SRT is better for archival since it preserves all original data.