SubtitleBurner

In-Browser Subtitle Burning

Burn subtitles into your videos with high-quality in-browser processing. 100% client-side processing, no uploads, complete privacy.

100% Offline
Lightning Fast
Free Forever

Core Functionalities

Everything you need for in-browser subtitle burning, powered by cutting-edge web technology.

100% Offline Processing
Your videos never leave your device. Everything runs locally in your browser using WebAssembly technology.
Lightning Fast
Advanced processing strategies with automatic optimization. Smart filtering reduces processing time significantly.
High Quality
Multiple output formats, custom fonts, advanced styling options, and batch processing capabilities.
Universal Compatibility
Supports SRT, VTT, ASS, and SSA subtitle formats. Works with all modern video formats.

Frequently Asked Questions

Everything you need to know about SubtitleBurner

No, the processing happens entirely in your browser using WebAssembly. If you close the browser tab, the processing will stop. However, you can minimize the window and continue using other applications while processing continues.
Absolutely! Your videos never leave your device. All processing happens locally in your browser using WebAssembly technology. No uploads, no server processing, complete privacy guaranteed.
We support most common video formats (MP4, WebM, etc.) and subtitle formats including SRT, VTT, ASS, and SSA. The tool automatically detects and processes your files accordingly.
Processing time depends on your video length, quality settings, and device performance. Our smart optimization automatically filters irrelevant subtitles to reduce processing time. Most videos process in 2-5 minutes.
No installation required! SubtitleBurner runs entirely in your web browser. Just visit the website and start burning subtitles immediately. Works on any modern browser.

Open Source & Community Driven

SubtitleBurner is completely open source, built with modern web technologies. Contribute to the project, report issues, or customize it for your needs. Transparency and community collaboration at its core.

Apache 2.0 Licensed
Free Forever