SUB

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SRT

Convert SUB to SRT Online

Convert SUB to SRT online. Start with free daily conversions, no install, no watermarks, and visible job status.

SUB to SRT Converter

Upload your SUB file to convert it to SRT format

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How to Convert SUB to SRT

Follow these simple steps

Step 1: Upload Your File

Upload your SUB file by dragging and dropping or clicking to browse

Step 2: Select Output Format

SRT is automatically selected as the output format

Step 3: Start Conversion

Click the Convert button to start the conversion

Step 4: Download Result

Download your converted SRT file when ready

Convert SUB to SRT - Complete Guide

Converting SUB to SRT stays in the subtitle file family but changes the traits that decide size, quality, transparency, editability, or device support. SUB is a subtitle format often used for MicroDVD-style timed captions. SRT is a simple subtitle format with numbered captions and start/end timestamps. Below is what actually changes in a SUB→SRT conversion, what is preserved, and when SRT is the better choice than keeping SUB.

What changes when you convert SUB to SRT

Both formats store data without lossy compression, so converting SUB to SRT preserves full quality.

About the SUB format

SUB is a subtitle format often used for MicroDVD-style timed captions.

Compression: none
Opens with: VLC, MPC-HC, Subtitle Edit

Where SUB is strong: simple plain-text subtitles with timing; supported by common desktop media players.

Typical SUB uses: video player subtitles, MicroDVD and VobSub subtitle tracks.

About the SRT format

SRT is a simple subtitle format with numbered captions and start/end timestamps.

Compression: none
Opens with: VLC, every video player, editors

Where SRT is strong: the most widely supported subtitle format; simple numbered captions with timestamps; easy to edit in any text editor.

Typical SRT uses: video player subtitles, YouTube and streaming captions.

What SRT keeps

Full original quality — no lossy re-compression is applied.
SRT adds: the most widely supported subtitle format.

Things to watch out for

One SRT limitation to keep in mind: no styling or positioning.

When to convert SUB to SRT

Convert SUB to SRT for video player subtitles.
Convert SUB to SRT for YouTube and streaming captions.
Choose SRT when a website, browser, or upload form rejects your SUB file.

SUB vs SRT — format comparison

A quick side-by-side of the structural differences between SUB and SRT, so you can confirm this is the right conversion for your file:

Attribute	SUB	SRT
Type	Subtitle file	Subtitle file
Compression	Uncompressed	Uncompressed
Typical file size	Small	Small
Best for	video player subtitles	video player subtitles

Privacy & Security

Files are handled for the conversion you request. Uploads and downloads use HTTPS/TLS, and temporary files are cleared after the processing and deletion window.

Add this SUB to SRT converter to your site

Put a working SUB to SRT converter on your own blog or website — free to embed. Both options below include a small link back to FreeFastConverter.

Embeddable widget (iframe)

Paste this where you want a live converter. Visitors can convert SUB to SRT without leaving your page:

Widget Embed Codeiframe

<iframe src="https://freefastconverter.com/embed/subtitle/sub-to-srt" width="100%" height="560" style="border:1px solid #e5e7eb;border-radius:12px;max-width:480px" title="Convert SUB to SRT" loading="lazy"></iframe>
<p style="font:13px/1.5 sans-serif;margin:8px 0 0">Free <a href="https://freefastconverter.com/converter/subtitle/sub-to-srt-converter" target="_blank" rel="noopener">SUB to SRT converter</a> by FreeFastConverter</p>

Simple link badge

Prefer a lightweight button instead? Copy this HTML badge:

HTML Badge CodeLink

<a href="https://freefastconverter.com/converter/subtitle/sub-to-srt-converter" target="_blank" style="display:inline-flex;align-items:center;gap:8px;padding:10px 18px;background:#f97316;color:#ffffff;font-family:sans-serif;font-weight:600;border-radius:12px;text-decoration:none;font-size:14px;box-shadow:0 4px 12px rgba(249,115,22,0.25)">Convert SUB to SRT</a>

Other SUB Conversions

More formats you can convert SUB to

View all SUB conversions →

Convert to SRT

Other formats you can convert to SRT

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SUB to SRT FAQ

Will converting SUB to SRT reduce quality?

Converting SUB to SRT preserves the content faithfully; output also depends on the source file and any settings you choose.

How do I convert SUB to SRT?

Upload your SUB file, confirm SRT as the output format, and click Convert. Job status is shown while the file is processed, then you can download the SRT result.

Is the SUB to SRT converter free?

Yes. You can start with free daily conversions, with no signup required for your first jobs and no watermarks on the output. Accounts and paid plans are available for higher-volume work.

Do I need to install software to convert SUB to SRT?

No. The SUB to SRT conversion runs in your browser on any device — Windows, Mac, Linux, iOS, or Android — with uploads and downloads over HTTPS.

How long does SUB to SRT conversion take?

Processing time depends on file size, format, and queue load. The page shows job status while conversion runs.

Can I convert multiple SUB files to SRT?

Yes. You can add multiple SUB files to a batch and process them together within the current file-size and credit limits.

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SUB

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SRT