Free online XML to VTT converter

What the XML format is

XML is a structured, extensible markup format that stores data in nested elements and attributes. Subtitle and transcript programs may export XML as TTML, DFXP, EBU-TT, or a proprietary caption format containing text, start times, end times, speaker information, styling, and language metadata. Video editors, captioning applications, speech-recognition tools, and media-management systems commonly create these files.

The extension alone does not identify the caption schema. A generic XML file containing no timed text cannot be converted into a useful subtitle file without deciding which text belongs to each cue and supplying timestamps.

What the VTT format is

WebVTT is a plain-text caption and subtitle format used by HTML5 video players, browsers, learning platforms, and many editing applications. A valid file starts with WEBVTT, followed by cue blocks containing timestamps and caption text:

WEBVTT

00:00:02.000 --> 00:00:05.500
Welcome to the presentation.

VTT supports cue identifiers, speaker labels, line positioning, alignment, regions, and limited inline markup. It is usually easier to inspect and edit than XML, and it can be loaded directly by an HTML video element through a <track> element.

How to actually convert XML to VTT

1. Inspect the XML in a code editor or browser and identify the elements containing cue text, start times, and end times. Confirm whether times are expressed as seconds, milliseconds, or clock values.
2. Open the free converter on 101convert.com, choose the XML-to-VTT conversion, and upload the source file.
3. Start the conversion and download the resulting .vtt file. If the service offers a schema or subtitle-type option, select the format matching the source, such as TTML or DFXP.
4. Open the output in a plain-text editor and verify that the first line is WEBVTT, every cue has a timestamp range, and timestamps use HH:MM:SS.mmm --> HH:MM:SS.mmm.
5. Test the file with the target player or editor. For browser playback, reference it with <track kind="subtitles" src="captions.vtt" srclang="en" label="English">.

If the XML is proprietary or the converter cannot identify its schema, export captions from the original program as TTML, SRT, or another standard subtitle format first, then convert that export to VTT. A custom script is required when the XML stores timing in application-specific attributes or separates timing data from the dialogue.

Quality and compatibility considerations

Conversion can preserve cue timing and text only when the source contains both. Font settings, complex XML styling, embedded images, pronunciation metadata, and application-specific annotations may be discarded because VTT supports a narrower set of features.

Check for overlapping cues, reversed start and end times, missing milliseconds, and malformed entities such as unescaped ampersands. Use UTF-8 encoding to preserve accented characters and non-Latin scripts. Keep cue times within the media duration, and review line breaks because automatic conversion may create overly long lines or split speaker labels incorrectly.