Convert WebM to FLV Online Free
Convert WebM video to FLV format for Flash Player compatibility and legacy streaming platforms. ChangeThisFile uses server-side FFmpeg to handle the conversion securely with no software installation required.
ChangeThisFile converts WebM to FLV free using FFmpeg on secure servers. Your file is uploaded with encrypted transfer, converted server-side, and automatically deleted after download. No signup or installation needed for this fast online conversion.
Convert WebM to FLV
Drop your WebM file here to convert it instantly
Drag & drop your .webm file here, or click to browse
Convert to FLV instantly
WebM vs FLV: Format Comparison
Key differences between the two formats
| Feature | WebM | FLV |
|---|---|---|
| Full Name | WebM | Flash Video |
| Developer | Google (via On2/Xiph) | Adobe Systems |
| Container | Matroska-based | Flash Video Container |
| Video Codec | VP8, VP9, AV1 | H.263, VP6, H.264 |
| Audio Codec | Vorbis, Opus | MP3, AAC, Nellymoser |
| Browser Support | Modern browsers | Requires Flash Player (deprecated) |
| Streaming | DASH, HLS | RTMP streaming |
| File Size | Compact | Moderate |
When to Convert
Common scenarios where this conversion is useful
Legacy Flash-Based Platforms
Convert modern WebM recordings for upload to older video platforms or CMS systems that still expect FLV file inputs.
Archiving Flash Video Libraries
Convert WebM content to FLV to maintain consistent format archives alongside existing FLV media collections.
RTMP Streaming Workflows
Prepare video content in FLV format for use with legacy RTMP streaming servers and older broadcast tools.
Video Editing with Older Software
Use FLV as an intermediate format for video editing tools and timelines that predate WebM support.
Educational Platform Compatibility
Convert course videos to FLV for e-learning platforms built on older Flash-based video players.
How to Convert WebM to FLV
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1
Upload Your WebM File
Drag and drop or click to upload your WebM video. Files are sent over an encrypted HTTPS connection to our secure conversion servers.
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2
Server-Side FFmpeg Conversion
FFmpeg processes your WebM file and encodes the video using H.264 with AAC audio in an FLV container for broad Flash compatibility.
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3
Download Your FLV File
Your converted FLV downloads automatically when ready. The original WebM is deleted from our servers immediately after conversion.
Frequently Asked Questions
FLV (Flash Video) is needed for legacy Flash-based video players, older streaming platforms, and archiving alongside existing FLV media libraries. While Flash is deprecated, many archived systems still rely on FLV.
FLV files are natively played by Adobe Flash Player. However, modern media players like VLC can play FLV files without Flash Player installed.
Some re-encoding quality loss is inherent when converting between compressed formats. ChangeThisFile uses FFmpeg with optimized settings to preserve as much quality as possible.
The converted FLV uses H.264 video encoding (also known as FLV1/H.264 in FLV containers) with AAC audio for the best quality and compatibility.
Your WebM file is uploaded via encrypted HTTPS, processed on isolated secure servers, and deleted automatically after you download the result. No data is retained.
Files up to 50MB are supported. If your WebM file is larger, consider trimming it or reducing the resolution before uploading.
There is a rate limit of 5 conversions per minute to ensure fair usage. You can convert as many files as needed within this limit.
FLV with H.264 encoding supports HD resolutions including 720p and 1080p. The output resolution matches your source WebM video.
No installation needed. ChangeThisFile runs entirely in your browser with server-side conversion via FFmpeg. No plugins or software required.
Yes, ChangeThisFile is completely free with no hidden costs, subscriptions, or account requirements.
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