Add Subtitles

Why add subtitles with Tools Root

Subtitles that are always visible, regardless of platform, player, or whether sound is on, need to be burned permanently into a video's picture. This free subtitle tool takes your own .srt or .vtt file and renders it directly into the video, right in the browser.

Real, permanent rendering, not a togglable overlay

This genuinely rewrites the video's picture frame by frame with your subtitle text embedded, using a real FFmpeg engine — the result plays correctly with visible subtitles on any device or platform, with no dependency on separate subtitle-track support.

A free subtitle burner using your own subtitle file

Rather than an AI transcription feature, which introduces its own accuracy questions, this tool burns in a subtitle file you provide, giving you full control over exactly what the subtitles say and when they appear — at no cost and with no limit on video length.

Common use cases

Adding permanently visible subtitles to a video for social media, where autoplay often happens without sound, burning in translated subtitles for a video going to an international audience, adding captions to an educational or training video for accessibility, embedding subtitles into a video for a platform with unreliable subtitle-track support, or permanently captioning a video before archiving it.

Related video tools

If the video needs trimming or resizing before adding subtitles, Trim Video and Resize Video handle that preparation first.

Why burned-in subtitles work more reliably than a separate track

A separate, togglable subtitle track depends on the video player actually supporting and correctly displaying that track — support that varies significantly across platforms, especially on social media, where videos are frequently re-encoded or stripped of extra tracks during upload. Burning subtitles directly into the picture removes that dependency entirely, since the subtitles are simply part of what the video looks like.

Preparing a subtitle file before burning it in

An accurate .srt or .vtt file, with correct text and correctly timed timestamps for each line, is what determines the quality of the final result — since this tool renders exactly what the subtitle file specifies, time spent getting the subtitle file's timing right beforehand directly translates into correctly synced subtitles in the final video.