Browser Media Converter (FFmpeg.wasm)
0. Engine
Idle.
Log


        


        

          
1. Load File

          

            Drop file here

            or click to choose a file.
            

            
          


          
2. Output


          

            

            
            

          


          

            
            

              
              
            

            

              Auto: originalName_to_ext.ext • Custom: you enter a base name (extension is added automatically).
            

          


          

            

            
            

              High uses sensible defaults (e.g. 320k + 48kHz for audio, ~60fps for video). Use Custom to override.
            

          


          

            Advanced controls

            

              Leave a field blank to keep source / default. Some encoders might not exist in wasm builds (then ffmpeg will error in the log).
            


            
Audio

            

              

                
Bitrate (kbps)

                
                
Controls compression quality for MP3/AAC/Opus/Vorbis. Higher = bigger file.

              

              

                
Sample rate (Hz)

                
                
Resamples audio. Common: 44100 (music), 48000 (video).

              

              

                
Channels

                
                
Downmix or force stereo. Mono reduces size.

              

            


            
Video

            

              

                
FPS

                
                
Frame rate. Higher = smoother but heavier.

              

              

                
Scale (w:-1)

                
                
Resize video. Use -1 to keep aspect ratio.

              

              

                
Codec

                
                
Chooses video encoder. Availability depends on the wasm build.

              

              

                
CRF

                
                
Quality knob (mainly H.264/VP9). Lower = better quality, bigger file. Typical: 18–28.

              

            


            
GIF

            

              

                
GIF FPS

                
                
Controls animation smoothness vs file size.

              

              

                
GIF scale (w:-1)

                
                
Downscale GIFs to avoid huge outputs.

              

            

          


          
3. Convert

          

            
            
          

        


        

          
Engine: not loaded

          
Worker: same-origin required

          
Mode: browser-only