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Best Ways to Convert MP4 to SWF Easily with High Quality

Written by Elena on May 30, 2018

Last updated: May 30, 2018| 6 minutes to read

mp4 to swfSmall Web Format, commonly known as SWF, is an Adobe Flash file format. It’s a common practice to convert videos such as MP4 to SWF when it comes to uploading video content to websites because SWF files are small and fast to load and offer good quality. Video data can be converted into a compact and efficient form in an SWF file in more than one way. And you will find the best ways on how to convert MP4 to SWF in this article.

3 Best Ways to Convert MP4 to SWF

There are a few easy methods to convert MP4 to SWF. You can choose the one that suites you best.

Method 1. Convert MP4 to SWF with Professional Software

Professional MP4 to SWF software programs are able to provide high quality conversion with high speed and batch conversion of multiple files, among other useful features. Below are the best MP4 to SWF converters for Mac and Windows users.

1. iFunia Video Converter (Mac)

iFunia Video Converter for Mac can convert your MP4 files to SWF on Mac without losing quality with fast conversion even when dealing with large files. In addition to MP4, it can also convert videos of various other formats such as AVI and MOV to SWF. This tool is easy to use and versatile with the following main features.

  • Convert video files to SWF format with high quality
  • Convert videos and audios between 400+ popular formats
  • Download HD (including 1080p) videos from YouTube, Facebook, Vimeo and 1000+other sites
  • Batch conversion/download
  • Rip and burn DVD
  • Video editing with functions such as Watermark, Effects, Merge, Subtitles, etc.

Here are the instructions to convert MP4 to SWF on Mac with this app.

1. Download and install iFunia Video Converter on your Mac. It supports OS X 10.10+, including macOS 10.13 High Sierra.

2. Drag and drop one or multiple MP4 files to this MP4 to SWF converter which can batch convert MP4 files to SWF.

3. Click the RVC button to open the output format window. Go go General Video, scroll down and select SWF. Click the conversion button, and let the app do its magic. You can use the same steps to convert videos of other formats to SWF.

2. Kvisoft Video to Flash (Windows)

As the name suggests, it is a software dedicated to converting MP4 to SWF. It allows users to effortlessly convert MP4 videos to SWF or FLV on Windows. In addition, basic video editing features such as adding watermark and effects are also available. While the interface looks a bit outdated, the converter is simple and easy to use. Here is a short list of what this converter can do.

  • Converts videos to SWF and FLV
  • Allows users to do basic vide editing
  • Can change bit rate, frame rate, video resolution, audio sample rate, etc.

1. Download and install this MP4 to SWF converter on your computer. It supports Windows XP and later versions.

2. Click the Add Video button to import video files. Drag-and-drop is not supported.

3. Click the Formats button, and a window will appear. Edit and adjust the added video if necessary.

4. Click Next, and you will find four options (all selected by default). Unselect the unneeded ones and click the big Start button. After the conversion is completed, click Browse to find the converted file.

mp4 to swf with kvisoft

Method 2. Convert MP4 to SWF Using Online Converter

There are many free online MP4 to SWF converters available. Some of them offer decent conversion service, but some are not good to use with annoying and potentially malicious pop-ups. The converters recommended below are ad-free and safe to use. It’s worth mentioning that Zamzar, one of the most known online file converters, currently doesn’t support the conversion between MP4 and SWF.

1. convertio.co

Convertio is one of the best web-based tools that can convert MP4 to SWF format. In addition to supporting video files, it can also convert documents, images, e-books and audios. Since founded in 2014, it has converted more than 151 million files, which is quite impressive. After adding MP4 file to convert, you only need to choose output format (SWF in this case) and click Convert.

mp4 to swf free with online converter convertio

Allows users to import files from computer, Dropbox and Google Drive
Supports major video formats including MP4 and SWF
Allows users to save converted files directly into cloud storage
Maximum file size of 100 MB for free conversion
Only allow users to convert up to 2 files at the same time

2. cloudconvert.com

Versatile and powerful, CloudConvert can not only convert MP4 to SWF online smoothly but also convert files of different types and formats such as documents, spreadsheets, music files, archives, etc. It only requires three easy steps to do the conversion. Add file from your computer or file storage services, choose output format and click the conversion button.

mp4 to swf free online converter cloudconvert

Support major formats of various file types
Allows users to upload files from computer as well as file storage services
Enables users to trim videos and adjust codec, bit rate, aspect ratio, etc.
Batch conversion is not available for free conversion
Maximum 1GB file size for free conversion

3. freefileconvert.com

This is another free online MP4 to SWF converter. It supports a wide variety of file types and lists on its home page the popular conversion types for quick navigation. After the conversion from MP4 to SWF is completed, the file will be available for download, but the file will only be kept on the server for 24 hours. For registered users, the converted files will be accessible for longer period of time.

mp4 to swf free online converter freefileconvert

Supports 22 video formats including MP4, SWF, AVI, etc.
Also supports documents, fonts, audios and so on
Allows users to import files from cloud service provider
Maximum 300 MB file size
Converted files will be deleted after 24 hours

4. aconvert.com

Just like the MP4 to SWF online converters that have already been mentioned, this one is also versatile and powerful, with support for tons of file types and formats. In addition to converting, it can also cut, merge, rotate, crop and pad videos. Before hitting the conversion button, you can also change video size, frame rate, aspect (4:3 or 16:9) and a couple of other options.

mp4 to swf free online converter aconvert

Supports lots of video formats and other types of files
Allows basic editing such as cutting and rotating
Can also convert web pages to PDF
File size can only be up to 200M.
A bit slow compared with some other online converting tools

Method 3. Convert MP4 to SWF Using Adobe Software

Initially developed by FutureWave Software, the SWF format is now under Adobe Systems and is compatible with several Adobe products. The steps below will show you in detail how to convert MP4 to SWF format using Adobe Media Encoder.

1. Add a MP4 file to Adobe Media Encoder by clicking the + button.

convert mp4 to swf using adobe software add file

2. Click the arrow down icon under the Format option and choose SWF as the output format.

3. This step is optional. If you want to change frame rate, resolution, etc. of the output SWF file, you can do this easily in Adobe Media Encoder.

4. Choose a folder where you want the converted file to be saved. Click the play button to start the conversion.

convert mp4 to swf using adobe software start conversion

Possible Problems You May Face When Converting MP4 to SWF

No audio after conversion from MP4 to SWF It’s not an uncommon problem when it comes to video conversion. If you are experiencing this problem when converting MP4 videos to SWF, check if the converter you use has an option of or similar to enabling audio. Make sure to enable this option. The easier way is to use the converters recommended above to convert your MP4 video SWF with sound.

Watermark in the output SWF file This is common with the free version of some MP4 to SWF converters. To convert MP4 file to SWF without watermark, you can upgrade and become a paying user, or you can use the software and online converters that we have recommended in this article.

File size increases after conversion The SWF format is known to be relatively small in size when compared with some other formats. It makes sense that we expect to convert MP4 to SWF with smaller size. The fact is that the conversion often leads to an increase in file size. If you need the output SWF file to be significantly smaller in size and still have good quality. We recommend the aforementioned iFunia Video Converter which can compress files without loss of quality.

Learn More about the SWF Format

the swf formatWhat is SWF? It is an Adobe Flash format that can contain vector graphics, videos, audios, among others and is widely used for displaying multimedia and interactive content. Due to advantages such as cross-platform layout, independence from local recourse, fast loading, etc., SWF is a preferred format when it comes to embedding videos on websites. SWF files can be opened by Adobe Flash Professional, Adobe Fireworks, After Effects, Adobe InDesign, Adobe Flash Builder, Adobe Captivate, just to name a few.


Above are the three easy methods to convert MP4 files to SWF with high quality, along with details of the best converters for you to choose from. Among them, online converters are easy to use because there is no need to install any software. However, there are limits on file size and supported formats. Also, lossless conversion and high speed are not available.

With professional MP4 to SWF software programs like iFunia Video Converter for Mac, you can batch convert files without quality loss. The conversion is fast and efficient regardless of file size. In addition, they also offer other powerful features such as HD video downloading and editing. Do you find this article helpful? Your comments and opinions are welcome.

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