Version 1.5

LittleFox is a designedly small util developed to synthesis video or audio to movie with subtitles. With the help of it, you can burn your favourite mp3 to video with lyrics words in several minutes, make slideshows by merging pictures with speech audio, synchronise some words to an exists video, or just scale the screen size of your videos to slim them so that you can very easily share them on social websites.

LittleFox is a small tool designed to help user share audio or video on social websites in an efficient way.

Share audio and video on social websites

LittleFox can produce very smaller video files than original mp3 or mp4 files so that the produced file can be suitable to share on social websites. With the help of it, it become very simple and easy to add subtitles to video, turn your favourite songs to video, or add words to exists videos such as the video recordings in your mobile phone, and share them on social websites, such as Twitter, Youtube, Vimeo, Netflix etc.

If you can't open the link above, please launch App Store and found LittleFox by searching.



How to add subtitles to audio on Mac?
How to turn my favourite mp3 to video with lyrics words?

The follow are the steps about how to synthesis audio with lyrics. Surely you can also synchronise speech with pictures using the same steps very conveniently, such an approach to make slideshows with speech audio is more convenient than common PowerPoint representations making.

Step 1. Click to load lyrics file, the app will parse the file line by line automatically.

Note: each line of the file should satisfy the format: [00:00.00] xxx xxxx, such files can be easily generated by a small tool software, LyricsMaker, it was designed to smoothly pair work with LittleFox.

What is the relation between LittleFox and LyricsMaker?

LyricsMaker designed to generate lyrics sheet but LittleFox designed to burn audio or video with lyrics sheet to movie. LittleFox just uses lyrics sheet as text format to know when words should be showing in the final movie.

Step 2. Right click any line of the parsed lyrics then click the prompt menu "Add Image" to load a image file for the selected line. The image file should be PNG or JPEG file formats that always has .png, .jpg or .jpeg extension name. You can click "Preview Image" to view a bigger size of the loaded image and click "Remove Image" to delete it if you don't want it. Add images to audio is optional, the app can synthesis audio with lyrics words and output movie without any image loaded, so you can skip this step directly.

Step 3. Click to choose an audio file and then the app immediately ask you to select a output directory that the final movie file will be placed there, the file has a same name with the audio file but with a .mp4 extension name.


How to add subtitles to video on Mac?
How to slim my videos so that I can share them on social websites easily?

The follow are the steps about how to synthesis video with lyrics, of course the lyrics file can be any content you desired to.

Step 1. Same as the step 1 of the audio synthesis.

Step 2. Same as step 2 of the audio synthesis, but it's not necessary to add image to movie in common situations, so this step is optional and you can skip this step directly.

Step 3. Click to choose an video file and then the app immediately ask you to select a output directory that the final movie file will be placed there, the file has a same name but plus a "+" symbol with the original file name, e.g. test.mp4 will be generated as test+.mp4.

Slim videos: You can sync a movie without lyrics words, it's useful, i.e. just resize the screen size of a video and generate a very small output movie just like operate in common video editors.


Click to specify the default settings of the output movie file.

A. The screen width and height of the output movie, the supported range of them is from 100x60 to 1920x1080.
B. The position of the subtitle on the screen.
C. The font style of the subtitle, there are several combine of Bold(B), Italic(I), and Underline(U) of font style. There, R means regular font style, and the number on the left side of Font button is the size of the font will be used.
    You can customise the colours for the subtitle font style:
   . The Front colour of the subtitle.
   . The Background colour of the subtitle.
   . The Shadow colour of the subtitle.
   . The Underline colour of the subtitle.
   . The colour of screen background, this option is only effective for audio synthesis.

D. Click Reset button to restore all settings to defaults.
E. Click OK button to save all settings, your settings will be kept until the next time you changed it.
F. Click Cancel button to give up changing of settings.


Set subtitle with transparent background or transparent shadow or set the output movie screen transparent background, click the button on the right side of "Background Colour" or the button on the right side of "Shadow Colour" or the button on the right side of "Screen Background", and then on the prompt panel select the colour "White".

What's new:

Pair a translated line with an original line and display them simultaneously. The plussed extra line must begins with "&& " three character (two & symbol and a space), e.g:

[02:18.77]And no other could give more love
&& あなたの愛は十分です

The first line is the original line, and the below line is a translated line, the two lines will be displayed simultaneously in the final video.


  1. LyricsMaker, a small util that was designed to make lyrics sheet for songs very easy, it can pair work with LittleFox smoothly.
  2. Personal FTP Server, a small util developed to translate files between iOS device and MacBook simple and easy.
  3. Audacity, an excellent cross-platform audio editor that can help you convert plenty of audio formats to MP3.
  4. ASS specification, the ASS/SSA (Advanced Substation Alpha/Substation Alpha) subtitle format definition.
  5. Aegisub, the advanced subtitle editor, cross-platform open source tool for creating and modifying subtitles.
  6. VSFilter (DirectVobSub), a tool software used to extract subtitles from DVD video and create text-based subtitles.
  7. SubRip, an utility used to rip DVD Video, AVI, or DivX movie subtitles with their timing as a text file.

Sample Videos

Some output sample videos placed at github with style samples, so that you can take a look and then got the answer of such questions, "How to turn my favourite mp3 to video with lyrics words?". From a plain lyrics text file to lyrics sheet, and to the final music video, you can feel so relaxed that it can be accomplished only in several minutes. Now, you can generate music video aka karaoke video without these boring works.

Now, simply and intuitively synchronise subtitles without subtitle editors.

Some most popular social sharing websites list here:
Twitter YouTube NetFlix Vimeo Hulu Vine Instagram Tumblr Nicovideo VEOH Break DailyMotion Vube Vevo Twitch Periscope TV UStream Viewster MetaCafe LiveLeak Blip Flickr Yahoo! Screen Snapchat Myspace Vudu ABC Smugmug Younow viddler Pinterest Byte LBRY VEVO Reddit QQ Linkedin Facebook Youku