Are my SUB files uploaded anywhere?

No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.

Is converting SUB to SRT free?

Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.

Does converting SUB to SRT lose quality?

No. SRT stores the same content without discarding anything, so the result is identical in quality to the original.

Do I need to install anything to open SRT files?

No installation is needed for the conversion itself — it runs in the browser you already have. Opening the SRT afterwards needs whatever software normally handles SubRip Subtitle on your device.

SUBtoSRT

Convert SUB to SRT

Up to 3 files at once, 100 with Pro. Mixed formats are fine.

You can convert SUB to SRT free and without an account: drop the file above and the SRT is ready to download in a second or two. The conversion happens inside your own browser, so the file is never uploaded — it works on Windows, Mac, Linux, iPhone and Android, and keeps working with the network switched off.

What SUB and SRT are for

Frame-based subtitles. Goes out of sync the moment the frame rate changes.

The most widely supported subtitle format. Numbered blocks, timecodes, plain text.

How to convert SUB to SRT

Drop your SUB file onto this page, or click to pick one.
Choose SRT as the target. The conversion runs inside your browser — the file is never uploaded.
Download the finished SRT file.

SUB vs SRT: what changes

SUB compared with SRT
	SUB	SRT
Full name	MicroDVD Subtitle	SubRip Subtitle
File extension	.sub	.srt
Media type	text/plain	application/x-subrip

Quality: Nothing is lost. The result holds exactly the same picture, text or data as the original.
Where it runs: This conversion runs inside your browser. Your file is never uploaded, and it works with the network disconnected.

SUB to SRT: common questions

Are my SUB files uploaded anywhere?: No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.
Is converting SUB to SRT free?: Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.
Does converting SUB to SRT lose quality?: No. SRT stores the same content without discarding anything, so the result is identical in quality to the original.
Do I need to install anything to open SRT files?: No installation is needed for the conversion itself — it runs in the browser you already have. Opening the SRT afterwards needs whatever software normally handles SubRip Subtitle on your device.