Mofi – Content-aware fill for audio to change a song to any duration
I worked on a web service that allows you to import a song and define a target length that the song will be shortened or lengthened to. It does this by analyzing the song and finding repeating audio patterns. This is helpful for making any song match a video or performance with a set duration. You can also specify areas of the song to prefer or avoid. An example is available here: https://mofi.loud.red/edit/8bd3fdf780f8c3927e41029f3b957f8a7... The cool thing is that after the song is analyzed on the server, the client can recompute and preview the results completely…
Mofi – Content-aware fill for audio to change a song to any duration launched on June 26, 2023 with 708 votes, #9 of 4,655 launches that month and more than 99% of that year's launches. The site was still online in September 2026, 3 years on.
In plain words
Mofi is a web service that adjusts songs to match a specific duration by identifying and removing or repeating audio patterns. Users import a track, set a target length, and can mark sections to prioritize or skip. The tool analyzes songs on the server, then allows preview and adjustment entirely in the browser using WebAssembly. It's designed for creators who need songs to fit video lengths or performance times precisely.
written from the facts on this page · September 2026
From the sources
Shorten and lengthen a song, making it the perfect length to match a video or performance. or find a perfect loop for your next project!
Audjust analyzes your music to make it the perfect length, longer or shorter, while keeping the song flowing naturally. Enter the length you want, choose which parts to keep or remove, and export. Or find seamless loops when one play isn't enough. Audio shortener. Song lengthener. Perfect loop finder. Our tools allow for content-aware changes to your music that aim to avoid the awkward fadeouts or cuts that usually occur when you trim songs (plus you get to decide what to parts to keep and remove). We can also find you loops for your TikTok, IG Reel, or FL Studio sample! Works with mp3, wav, m4a, and most other files. Change the length of songs. Upload a song and make it shorter or longer…from mofi.loud.red
In the maker’s words, at launch
I worked on a web service that allows you to import a song and define a target length that the song will be shortened or lengthened to. It does this by analyzing the song and finding repeating audio patterns. This is helpful for making any song match a video or performance with a set duration. You can also specify…
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