Mofi — Content-aware fill for audio to change a song to any duration. It was shared on Show HN in 2023 and received 708 upvotes on Hacker News. 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!. Enter the length you want, choose which parts to keep or remove, and export. Or find seamless loops when one play isn't enough. 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 parts to keep and remove). We can also find you loops for your TikTok, IG Reel, or FL Studio sample! Upload a song and make it shorter or longer while keeping a natural ending and an uninterrupted flow. Mark the parts of a song to keep or avoid, and the results update to match. You can also find loops built around the sections you like. Audjust has processed thousands of songs already and is loved by its users: “This is a wild app” Twitter “Tried it out. → No account or email required If this FAQ does not answer your questions, feel free to check out the about page for more information. This is helpful if you need to shorten a song to match a video you already edited. How can I make a song longer seamlessly? You can find more information on our blog: Audjust vs. Introducing it on Hacker News, the author wrote: "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. This is helpful for making any song match a video or performance with a set duration."