Convert ASS files to VTT free in your browser — no signup, no install, and the file is never uploaded to a server. VTT keeps full quality with no further loss.
Add your ASS file
Drag the ASS file onto the drop area above, or click it to pick a file from your device. You can add several files at once.
Confirm VTT as the output
VTT is already selected as the output format on this page. This format converts straight through with no extra settings.
Run the conversion
Press the convert button. Processing happens on your own device, so the time depends on your computer rather than a server queue.
Download the VTT file
When it finishes, download the VTT file. Converting multiple files gives you the option to download them together as a ZIP.
An advanced subtitle format that can specify fonts, colors, positioning, and even animation. It is widely used in anime fansubbing.
The web standard subtitle format for HTML5 video. It supports positioning, coloring, and chapter markers, making it ideal for web playback.
Yes. ASS to VTT conversion is completely free with no signup, no watermark, and no daily limit on the free plan for ordinary use.
No. The conversion runs entirely inside your browser using WebAssembly, so the ASS file never leaves your device. That is also why it works without an internet connection once the page has loaded.
VTT is a newer format. Current browsers and phones handle it, but older desktop software may not — keep the original ASS if you have to send it to someone on an old machine.
It can go either way. Both formats are lossless, so nothing is thrown away — the size difference comes from how each one packs the same data.
The free plan handles files up to 200MB. Because processing happens on your own device, very large files depend on your computer's memory rather than a server quota.
Subtitle converter
What each file format is, what it is used for, and which formats it can be converted to.
Open converter Browse the full format reference