FLV to MP4 Converter

Convert legacy Flash Video (FLV) files to modern MP4 format. Since Adobe officially discontinued Flash Player in 2020, millions of FLV files have become difficult to play. Our server-powered converter transforms your FLV files into universally compatible MP4 videos - preserving both video and audio quality. You can also convert other formats using our GIF to MP4, MP4 to GIF, or Video to GIF tools.

Drop your FLV file here

or click to browse files

FLV Flash Video Up to 200MB
Server-side processing for reliable conversion

How to Convert FLV to MP4

  1. Upload your FLV file by dragging it into the upload area or clicking to browse. Files up to 200MB are supported.
  2. Choose your preferred output format: MP4 (H.264) for maximum compatibility, WebM (VP9) for smaller files, or MP4 (AV1) for best compression.
  3. Adjust quality, resolution, and audio settings to fit your needs.
  4. Click "Convert to MP4" and wait for the server-side processing to finish.
  5. Download your converted video - ready to play on any modern device or browser!

Why Convert FLV to MP4?

Flash is Dead

Adobe officially ended Flash Player support on December 31, 2020. Major browsers have removed Flash entirely, making FLV files unplayable in web browsers.

Universal Playback

MP4 plays on virtually every device - iPhones, Android phones, tablets, smart TVs, gaming consoles, and all desktop systems. No plugins required.

Preserve Your Archives

Old training videos, screen recordings, or downloaded content from the Flash era deserve to be preserved in a future-proof format. Convert now before they become inaccessible.

Easy to Share

Upload MP4 videos to YouTube, social media, Google Drive, or embed them on websites. FLV files are rejected by most modern platforms.

FLV vs MP4 - Format Comparison

Feature FLV (Flash Video) MP4 (MPEG-4)
Browser Support None (discontinued) All modern browsers
Mobile Support Not supported iOS, Android, all devices
Video Codecs Sorenson Spark, VP6, H.264 H.264, H.265, AV1
Audio Codecs MP3, AAC, Nellymoser AAC, AC-3, Opus
Streaming Requires Flash Player HLS, DASH native
Social Media Rejected by all platforms Accepted everywhere
File Size Variable Typically smaller with H.264
Future-Proof No - dead format Yes - industry standard

Related Video Tools

GIF to MP4 MP4 to GIF Video to GIF GIF Compressor GIF Reverse GIF Speed Changer GIF Maker PNG to ICO ICO to PNG Video to MP3

Frequently Asked Questions

FLV (Flash Video) was the dominant video format for web streaming in the 2000s and early 2010s, used by YouTube, Netflix, and many other platforms. Adobe discontinued Flash Player on December 31, 2020, and all major browsers - Chrome, Firefox, Safari, and Edge - have since removed Flash support entirely. This means FLV files can no longer play in web browsers. While desktop players like VLC can still open them, converting to MP4 ensures universal compatibility across all devices and platforms.

MP4 (H.264) is recommended for most users - it works everywhere including older devices, iPhones, Android phones, and all social media platforms. WebM (VP9) produces slightly smaller files but has limited iOS support. MP4 (AV1) offers the best compression but requires newer devices and browsers. If unsure, stick with MP4 (H.264).

Yes, by default the audio track is preserved. You can choose to keep the original audio, re-encode it to AAC for better compatibility, or remove it entirely. FLV files typically use MP3 or AAC audio, both of which are handled properly by our converter.

You can upload FLV files up to 200MB. For larger files, consider splitting them first or using desktop software like VLC. If you need help with other file conversions, check out our full range of GIF tools and image converters.

Files are temporarily stored only during processing and are automatically deleted within 4 hours. We don't keep copies or use them for any other purpose. Your privacy is important to us.

Currently, this tool processes one FLV file at a time for optimal quality. For batch processing needs, convert each file separately or contact us for enterprise solutions.

Yes, it's a good idea. Since Flash is discontinued, FLV support will only decrease over time. Converting your FLV archive to MP4 now ensures you'll be able to play and share those videos for years to come. MP4 is the industry standard and isn't going anywhere.