How to Convert FLV to MP4 Online
Convert Flash FLV to MP4. Free, fast, and no account required.
Drop your FLV file here
or click to browse from your device
Supports FLV · Max 250 MB
🔒 Converted entirely in your browser — your file never leaves your device.
What Is FLV?
FLV is a video container format originally used with Adobe Flash Player. While Flash has been discontinued, FLV files still exist from older video content. The format supported efficient streaming but has been largely replaced by MP4 and WebM.
- Legacy Flash video content
- Older web video archives
Flash Player has been discontinued by Adobe. FLV files should be converted to MP4 or WebM for continued playback in modern browsers and media players.
What Is MP4?
MP4 is the most widely used video container format. It supports video, audio, subtitles, and still images within a single file. MP4 typically uses H.264 or H.265 video codecs and AAC audio, providing a good balance between quality and file size.
- Video sharing and streaming
- Social media uploads
- Video storage and archival
- Web video embedding
MP4 is a container format that can use different codecs. Compatibility depends on the specific codecs used within the file. H.264 with AAC audio offers the broadest device support.
Why Convert FLV to MP4?
- 1Improve compatibility by converting to MP4, which is supported by virtually all devices and applications
- 2No software installation required — convert directly in your browser
- 3No registration or personal information needed to use the service
How to Convert FLV to MP4
- 1
Upload your FLV file
Drag and drop your FLV file into the upload area above, or click to open your file browser.
- 2
Start the conversion
Click the "Convert to MP4" button. The conversion begins immediately and you can track progress.
- 3
Download the result
Once complete, click the download button to save your MP4 file to your device.
Privacy & Security
This conversion is processed entirely in your browser using WebAssembly. Your file is never uploaded to our servers — full privacy guaranteed.
Frequently Asked Questions
To convert a FLV file to MP4, use the upload area on this page. Drag and drop your FLV file or click to browse your files. Once uploaded, click the "Convert to MP4" button. The conversion will be processed and the resulting MP4 file will be available for download.
Yes. This conversion tool is completely free to use. There are no premium tiers, no watermarks applied to your output, and no limit on the number of conversions you can perform. The service is supported by advertising.
FLV (Flash Video) FLV is a video container format originally used with Adobe Flash Player. MP4 (MPEG-4 Part 14) MP4 is the most widely used video container format. Converting between these formats allows you to take advantage of the strengths of each format depending on your specific needs.
The output quality depends on the codecs and settings involved. When converting between lossy formats, some quality adjustment is expected. Video and audio conversions in FlipMyFiles are processed in your browser using standard encoding settings designed to maintain good quality.
Yes. Video and audio conversions are processed entirely in your browser using WebAssembly technology. Your file is never uploaded to our servers. The conversion happens locally on your device, providing full privacy.
The maximum file size is 250 MB per file. This limit applies to all format types. For video and audio files, conversion speed depends on your device's processing power since the conversion runs in your browser.