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Home > Movie Users>FLV to MP4: How to Convert FLV to MP4 With Zero Quality Loss

FLV to MP4: How to Convert FLV to MP4 With Zero Quality Loss

by Christine Smith • 2024-01-11 10:28:23 • Proven solutions

Adobe has announced that they will stop providing Flash support at the end of 2020, and Chrome also said that they would say goodbye to Flash. As the video format for Flash, FLV needs to be converted to a more compatible and popular format like MP4. Earlier, FLV held a popular position on the Internet for video format due to Adobe Flash plug-in availability. However, with advances in browser technology and Flash plug-in, the FLV format began losing its place. Video hosting services rarely use FLV now and have turned to MP4 as the new standard video format. That's why so many users are looking for FLV to MP4 methods.

MP4 format helps users with high-quality video content and the luxury of compression, thus reducing file size. It's widely used in almost all devices and websites, so if you need to convert FLV to MP4, read this article to learn the best FLV to MP4 converter and free online solution.

Part 1. Best FLV to MP4 Video Converter for Windows/Mac

Wondershare UniConverter (originally Wondershare Video Converter Ultimate) can be downloaded from its official website. The application can be downloaded for Windows and Mac. It converts to various video formats, one of them being MP4. The converted file can be used with different devices like Apple, Samsung, etc. There is no loss of quality and additional enhancement for the converted file. Also, this converter works at a speed that exceeds the speed of all other converters by 30 times.

Wondershare UniConverter

Security Verified. 5,481,347 people have downloaded it.
  • Directly convert FLV to MP4, AVI, MKV, MOV, and 1000+ other formats
  • Convert FLV to MP4 at 90X fastest speed and without losing quality
  • Edit the video files with trimming, cropping, cutting, merging, adding subtitles, etc.
  • Burn FLV videos to DVD with free menu templates and play with your DVD player
  • Download or record videos from 10,000+ video sharing sites
  • Industry-leading APEXTRANS technology converts videos with zero quality loss or video compression
  • Versatile toolbox combines video metadata editor, GIF maker, video compressor, and screen recorder

Steps on How to convert FLV to MP4 using the best FLV to MP4 converter for Windows/Mac

Step 1 Add FLV Videos to Wondershare FLV to MP4 Converter

Once you have completed the installation process after downloading the converter from the website or the link above, run the computer program. Drag and drop the FLV files you wish to convert from your system directly, or you can click the Add Files button to open the file browser. You're allowed to add files from devices directly.

add FLV files for conversion

Step 2 (Optional) Edit FLV Files

Once the FLV files are added to the program, you can opt for the video thumbnail's edit options to modify your source video. You're allowed to trim, crop, and cut videos, or add watermarks, apply effects, edit subtitles to the video with real-time preview.

edit FLV videos

Step 3 Choose MP4 as Output Format

Click on the Output Format option to open the drop-down list, choose the Video tab, select MP4 as your output format, and choose the desired resolution.

choose MP4 as output format

Step 4 Convert FLV to MP4

Once you have saved the changes, click on the Start All button to start converting FLV to MP4 on your PC/Mac. You can find your converted files under the Finished tab.

convert FLV to MP4

Free Download Free Download

Part 2. Free FLV to MP4 Converter

Wondershare Free Video Converter allows you to convert videos into any free format, including FLV to MP4 free conversion. With enough clarity and features, this converter can be downloaded from Wondershare with ease. The installation process is fairly easy. The converter also comes with a wide array of features, allowing users to experiment with their video formats.

Key features:

  • It offers a fast conversion speed that outshines many free converters in the market.
  • Easy-to-use interface and clear functions with high-quality output.
  • A single YouTube video downloading option is integrated into the converter.
  • An editing tool with an effective interface allows users to make modifications.

How to Convert FLV to MP4 Free with Wondershare Free Video Converter

As the free version of Wondershare UniConverter (originally Wondershare Video Converter Ultimate), we recommended in Part 1, FLV to MP4 conversion is done easily on Wondershare Free Video Converter with similar steps. Or you can download and install it and follow the easy introduction below to convert FLV files to MP4 for free.

Free Download Free Download

Step 1: Open Wondershare Free Video Converter after installation, and click the Add Files button to select and add the FLV video you want to convert to MP4 for free.

Step 2: Choose the output format as MP4 from the Video tab, which can be found in Convert all files.

Step 3: Click on the Convert or Convert All button to convert FLV to MP4 free. The process takes a few minutes according to your video length.

convert FLV to MP4 free

To learn more free FLV to MP4 converters, you can read the Top 5 Free FLV recommendation to MP4 Converters for Windows/Mac >>.

Part 3. Free Online FLV to MP4 Converter (Cloud-based)

Online Converter proves to be a decent option when you have basic file conversion needs. These online programs are cloud-based and need no download or installation. One such popular cloud-based online converter is Convertio. This program works with Windows as well as Mac system and supports a wide range of formats for conversion. The program allows adding files from your PC, URL, Dropbox, or Google Drive. The maximum of up to 100MB file size can be uploaded to the software interface for conversion. Multiple files can be added to the converter, and the files can be saved to Dropbox, Computer, or Google Drive once converted.

Steps to convert FLV to MP4 online using Convertio:

Step 1: Open on your PC browser.

Step 2: Add FLV files from your PC, Dropbox, or Google Drive to the software interface.

Step 3: Hit Convert to start the conversion process.

The download link for the converted file will be available on the program interface to download a file.

convert FLV to MP4 online using Convertio

With a few simple steps of this FLV to MP4 converter free, get your desired file.

Limits of this solution:

Online converters are free and simple to use, but the solution is not as professional as desktop software like UniConverter. The Below listed table shows the comparison between Convertio and the software.

Features/Program Wondershare UniConverter Convertio
Supported formats Support more than 1000 formats Support commonly used formats
Conversion Speed Super-fast (90X faster) Average speed
Upload file size limitation No limitation  Maximum size up to 100MB
Editing features Support editing features like trimming, cropping, and others No editing features supported
Video download Allows downloading videos from more than 10,000 sites Does not support downloading videos
Transfer converted video to devices Allows transferring videos to Apple and Android devices directly. N/A

Part 4. FLV vs. MP4

File Extension FLV MP4
Video File
Video File
Flash Video (FLV, F4V) is a container file format used to deliver video over the Internet using Adobe Flash Player versions 6-11. Flash Video content may also be embedded within SWF files. There are two different video file formats known as Flash Video: FLV and F4V. The audio and video data within FLV files are encoded in the same way they are within SWF files. MP4 is a container format used to store video, audio, and subtitles data. Since stores like iTunes use this container format and it is used with iPod and PlayStation (PSP). It becomes a popular format.
Associated Programs
Flash Player
Real Player
Apple QuickTime Player
Apple iTunes
Windows Media Player
Developed by
Adobe Systems
Moving Picture Experts Group
Useful Links

All About FLV
Top Five Free FLV Players in the Market

Introduction to FLV Video And its Formats 
Detailed information on the MP4 file format
How to Convert and Burn MP4 to DVD
How to Add Subtitles to MP4 Files 
How to Convert MP4 to iPad (iPad Air included)

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Christine Smith

Christine Smith

chief Editor

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