Subtitle Burner: Hardcode SRT/VTT Captions Into Any Video for Free
If you've ever needed to add captions to a video for social media, a tutorial, or accessibility, you know the usual options are a pain: video editors with steep learning curves, desktop software that eats gigabytes of disk space, or paid SaaS tools gated behind a subscription. Subtitle Burner skips all of that — it's a free, browser-based tool that permanently burns SRT or VTT subtitles into your video file.
What it does
Subtitle Burner takes two inputs — a video file (MP4, MOV, WebM, MKV, or AVI, up to 100 MB) and a subtitle file (.srt or .vtt, up to 2 MB) — and renders the captions directly into the video frames. Unlike subtitle tracks that a player can toggle on or off, "burned-in" captions are baked into the picture itself, so they show up everywhere: Instagram, TikTok, WhatsApp shares, embedded players, anywhere that doesn't respect separate subtitle tracks.
You can pick from three font sizes (small, medium, large) to match the video's resolution and viewing context, then download the finished file once processing completes.
How to use it
- Go to nutilz.com/subtitle-burner
- Drop in your video file, or click to browse
- Drop in your .srt or .vtt subtitle file
- Choose a font size
- Click burn, then download the result once it's ready
No account, no upload limits beyond the file size caps, and no watermark on the output.
Why it's useful
Burned-in subtitles solve a real distribution problem: most short-form video platforms autoplay muted, and viewers scroll past anything they have to tap to understand. Captions baked into the frame get watched. They're also useful for:
- Repurposing long-form content (podcasts, webinars, lectures) into clip-friendly captioned segments
- Making tutorial videos accessible without relying on a platform's auto-caption feature
- Sharing videos in contexts where the player won't render a separate subtitle track (raw file shares, some embeds, older devices)
- Language learners who want captions permanently visible regardless of player settings
If you already have a transcript or auto-generated captions in SRT/VTT format — from YouTube, Whisper, or a captioning service — this tool is the fastest way to turn them into a shareable, caption-baked video without installing anything.
Try it free
No signup required: https://nutilz.com/subtitle-burner
Free tools shouldn't come with friction. Subtitle Burner runs the conversion, hands you the file, and gets out of your way.
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