RealText to WebVTT Converter
FileFlip converts RealText to WebVTT entirely inside your browser, using FFmpeg compiled to WebAssembly. The file is never uploaded to a server: it is read off your disk, converted on your own machine, and saved back by the browser. That means no file-size limit, no queue and no account.
How do I convert an RealText file to WebVTT?#
- Drop your RealText file onto the converter at the top of this page, or click it to pick one from your computer. You can add as many as you like.
- Leave the target set to WebVTT and the conversion starts on its own. FileFlip downloads 30.8 MB of WebAssembly the first time and nothing after that, then runs FFmpeg on your own machine.
- Save the WebVTT file. Your browser writes it straight to your downloads folder, because there was never a server holding it.
Does converting RealText to WebVTT lose quality?#
No. Subtitle cues are text, and converting RealText to WebVTT rewrites the same timings and the same lines in the target's syntax. Anything WebVTT has no syntax for, such as positioning or styling, is dropped rather than degraded.
Is it safe to convert RealText files online?#
Yes, because nothing is uploaded. FileFlip converts RealText files inside the browser tab you already have open, using WebAssembly builds of the same engines a desktop converter would install. Your file is read from your own disk into the page's memory, and no request carrying it is ever made.
You do not have to take that on trust. Open your browser's network panel, run a conversion, and you will see the engine come down and your file go nowhere. There is no upload, no server-side copy, no retention window, and no account tied to what you converted.
How FileFlip works lists every engine, its version and its download size, and shows how to check for yourself that nothing leaves your machine.
What RealText to WebVTT actually does to the file#
Converting RealText to WebVTT runs on FFmpeg, downloads 30.8 MB of WebAssembly the first time and nothing after that, rewrites the cues as text in the target's syntax, keeps cue durations.
| Engine | FFmpeg |
|---|---|
| Conversion path | One step: RealText → WebVTT |
| Downloaded to your browser | 30.8 MB, once, then cached by your browser |
| Quality | Text preserved, unsupported styling dropped |
| You get back | One file |
| Where it runs | In a background worker, so the page stays responsive |
What survives the conversion
| What is in the file | This conversion | Why |
|---|---|---|
| Cue durations | Kept | Carried through into the converted file. |
What is an RealText file?#
An RT file is a RealText caption script, a tagged markup text track that RealNetworks built for the RealPlayer streaming stack, using <br/> tags for line breaks and reference by a SMIL presentation to time captions against RealMedia audio or video.
Recognize RealText as a legacy RealPlayer caption file if it turns up alongside old RealMedia content; there's little reason to author new captions in it.
Convert RealText to SRT or VTT to caption the content on any current player, since RealText support has effectively disappeared outside archived RealPlayer installs.
What is a WebVTT file?#
A VTT file is a WebVTT text track: a WEBVTT header followed by timed cues, each with a start and end timecode and one or more lines of text, optionally carrying position, size and CSS-style settings that place and format the text on screen.
Use WebVTT for subtitles served to an HTML5 <video> element, where the browser reads the track natively and honors its cue positioning and styling.
Convert WebVTT to SRT when the destination is a player or device outside the browser that only expects plain, unpositioned captions.
RealText to WebVTT questions people ask#
What is an RT (RealText) file?
An RT file is a RealText caption script, a tagged text format RealNetworks built to caption RealMedia audio and video played through RealPlayer. It's referenced by a SMIL presentation, which supplies the timing that syncs the captions to the media.
Can I still play RealText files today?
Rarely without the original RealPlayer software, since RealText was built for the RealMedia streaming stack and current browsers and video players don't support it natively. Converting the file to SRT or VTT is the practical way to use those captions with a modern player.
Is RealText the same thing as SMIL?
No. SMIL is the markup language that lays out and times a RealMedia presentation, and RealText is one of the pieces it can reference, a captions file the SMIL presentation calls in and synchronizes with the audio or video.
What is a WebVTT file used for?
A WebVTT file supplies the captions or subtitles for an HTML5 video, loaded through the <track> element so the browser displays them without any extra plugin. It's the format browsers expect natively, the way SRT is the format most desktop players expect.