How to convert MicroDVD to SRT

MicroDVD subtitle files are frame-based .sub text files. Instead of storing clock timestamps, each cue usually stores a start frame, an end frame, and subtitle text.

SRT is easier to upload, validate, and edit. It stores cue numbers, clock timestamps, and readable text blocks, so it works better with modern subtitle editors and platform upload forms.

Quick answer

Use the MicroDVD to SRT Converter to convert a MicroDVD .sub subtitle file into standard SubRip subtitles. The tool reads {start}{end} frame rows, uses a declared frame rate when the file includes one, and creates numbered SRT output locally in your browser.

When to convert MicroDVD to SRT

Convert MicroDVD to SRT when:

• an old .sub subtitle file needs to work in a modern editor
• a platform accepts SRT but not MicroDVD SUB
• you need a readable review copy with clock timestamps
• a DVD-rip or archive subtitle handoff needs a simpler format
• you want to validate, clean, or shift the subtitle after conversion

Keep the original MicroDVD file until you confirm the converted timing against the video, especially when the file does not declare a frame rate.

What changes during conversion

MicroDVD stores frame-based rows like this:

{1}{1}25.000
{25}{88}Welcome back to the edit
{105}{150}Today we are converting MicroDVD subtitles|They need SRT output

SRT stores clock-based cues like this:

1
00:00:01,000 --> 00:00:03,520
Welcome back to the edit

2
00:00:04,200 --> 00:00:06,000
Today we are converting MicroDVD subtitles
They need SRT output

During conversion, the tool:

• reads MicroDVD {start frame}{end frame} cue rows
• uses a first-row frame rate declaration such as {1}{1}25.000 when present
• assumes 25 fps when no frame rate row is available
• turns pipe separators into SRT line breaks
• removes simple MicroDVD styling markers that do not belong in SRT
• generates sequential SRT cue numbers

Frame rate warning

MicroDVD timing depends on frame rate. A cue that starts at frame 250 begins at 10 seconds in a 25 fps file, but at a different time in a 23.976 fps or 29.97 fps file.

If the source file declares a frame rate, the converter uses it. If not, the converter assumes 25 fps. Review the first, middle, and final cues against the video before delivering or uploading the SRT file.

Step-by-step workflow

1. Save a copy of the original MicroDVD .sub file.
2. Open the MicroDVD to SRT Converter.
3. Upload or paste the MicroDVD subtitle content.
4. Convert the file to SRT.
5. Check timing against the video, especially if the source did not declare a frame rate.
6. Run the output through the SRT Validator before upload.

Common mistakes

Using a video file instead of the subtitle file

MicroDVD to SRT conversion works on a separate .sub subtitle file. It does not extract subtitle streams from a video container and it cannot recover burned-in text.

Ignoring the frame rate

If the .sub file does not include a frame rate row, any converter has to assume one. A wrong frame rate can make subtitles drift or land at the wrong times.

Confusing MicroDVD SUB with image subtitles

Some subtitle files also use the .sub extension, including VobSub-style image subtitles. This converter is for text MicroDVD rows such as {25}{88}Subtitle text, not image-based subtitle pairs.

Frequently asked questions

How do I convert a MicroDVD SUB file to SRT?

Open the MicroDVD to SRT Converter, upload or paste the .sub file, and export the frame-based subtitle rows as numbered SRT cues.

What is a MicroDVD subtitle file?

MicroDVD is a frame-based subtitle format that usually stores cues as {start frame}{end frame}text lines in a .sub file.

Can I convert MicroDVD subtitles without uploading the file?

Yes. The converter runs locally in your browser, so the subtitle file does not need to be sent to a server.

Related guides

• How to validate SRT files
• Common subtitle format errors and fixes
• Why subtitles drift out of sync
• How to fix malformed SRT timestamps

Related tools

• MicroDVD to SRT Converter
• SRT Validator
• Subtitle Time Shifter
• Clean SRT File