AceTagGen

AceTagGen is a prompt building system for Suno, the AI music generator. It replaces trial and error in the style field with a structured twelve step builder that assembles genre, sub genre, mood, instruments, vocal style, production tags and sound effects into a prompt that respects Suno's own constraints, including the 1,000 character style field and the practical per category tag counts. The reference library behind it is the main asset: more than 3,200 verified tags organized into 16 genre families, over 1,700 sub genres, 430 instruments, 300 bracket tags, 190 moods, 180 vocal styles, 170 production tags and 75 sound effects across four categories, all searchable. The builder adds live collision detection, a character counter, line level control in a song editor and a 100 point quality score, with the scorer published as an open source npm package. Bracket tags for build ups, drops, breakdowns and final peaks can be assigned line by line so a track has dynamics rather than one flat energy level, and a vocal style can be anchored at the style level and reinforced per line to keep delivery consistent across sections. A research blog documents the findings behind the tag set. The builder, the tag library and the scorer are free, with no signup and no paywall. A paid tier called AceTagGen AI costs $7 per month and generates prompts automatically in any language or genre, with 300 requests a month included. The tool was built by a single Suno user who gathered and organized community research from forums, tutorials, shared experiments and Discord discussions across more than a dozen countries, and who publishes the methodology alongside the tool.