FLV to WEBM Converter
Convert Flash Video (FLV) to WebM (WEBM) online for free. Runs 100% in your browser. Files never leave your device. No signup, no watermarks, no limits.
Drag & drop files here, or browse
Processed on your device. Nothing is uploaded
Automate this. An open tab can convert whole folders via the Local API - still zero uploads.
Local API →How to use FLV to WEBM Converter
- 01Add files
Choose files or drop them here
- 02Settings
Settings · Runs on your device
- 03Download
Processed on your device. Nothing is uploaded
What is a FLV (Flash Video) file?
FLV was the dominant web video format in the Flash era. Since Flash Player was discontinued, FLV files generally need conversion to MP4 to remain playable.
- Developed by
- Adobe
- Initial release
- 2002
What is a WEBM (WebM) file?
WebM is a royalty-free web video format backed by Google, usually carrying VP8/VP9 video and Opus/Vorbis audio. It is optimized for HTML5 streaming.
- Developed by
- Initial release
- 2010
Frequently asked questions
How do I convert FLV to WEBM?
Click “Choose Files” or drag your FLV file onto the page, optionally adjust the settings, then hit Convert. Your WEBM file downloads straight from your browser. Nothing is uploaded anywhere.
Is this FLV to WEBM converter free?
Yes, completely free with no hidden limits, watermarks or signup. Because all processing happens on your own device, there are no server costs to pass on to you.
Are my files uploaded to a server?
No. The conversion engine runs entirely in your web browser using WebAssembly. Your files never leave your device. You can even disconnect from the internet after the page loads and keep converting.
Is there a file size limit?
We impose no fixed limit. The practical ceiling is your device's free memory, since processing happens locally. Most conversions work comfortably with files up to a few hundred megabytes, and image or document conversions handle much more.
Does it work on my phone?
Yes. The converter runs in any modern browser on Windows, macOS, Linux, Android and iOS. No app installation is required.