AceTagGen
Free prompt builder for Suno AI. Structured dropdowns for mood, genre, instruments, and SFX that respect Suno's 200-char Style limit. Includes example library and quality score.
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What is AceTagGen?
AceTagGen is the most comprehensive SUNO AI tag building tool, designed to help users create professional-grade prompts for Suno AI music generation without guessing. It features a smart 12-step system with 3,200+ verified tags, 1,700+ sub-genres across 16 genre families, 430+ instruments with audio previews, 190+ moods, 180+ vocal styles, 170+ production tags, and 75+ sound effects organized into four categories.
Key features include live collision detection that flags conflicting tags instantly, a 100-point prompt quality scorer with 15 specific validation checks, character counter with 1,000-char Style field enforcement, per-category limits (Genre 1-2, Mood 1-2, Instruments 2-3), line-by-line Song Editor with 300+ bracket tags, AI lyrics writer supporting 12 languages, auto song-structure detection, prompt library for saving builds, and one-click copy/export to Text, JSON, or PNG. The tool works in 12+ languages and includes music theory layers for keys, modes, scales, progressions, time signatures, groove, and tempo with Auto mode for non-musicians.
AceTagGen is perfect for Suno AI users who want intent-based production instead of probability-based creation, musicians who appreciate music theory depth, beginners who need Auto mode defaults, developers who want the open-source npm scorer package, and the global Suno community across US, Brazil, Japan, Germany, Spain, Korea, France, China, India, Mexico, and Italy.
AceTagGen pricing
Pricing model: Freemium
The Tag Builder 12-step system is completely free forever with no signup, no paywall, and no trial. Includes all 3,200+ tags, 100-point scorer, collision detection, Song Editor, AI lyrics writer, prompt library, and export features. AceTagGen AI (AI Chat producer) costs $7/month with 300 requests per month, providing full Style + Lyrics + tag sets from plain language descriptions in multiple languages. The open-source npm scorer package suno-prompt-scorer is free under MIT license with no auth or rate limits.
AceTagGen pros
- Completely free with no signup required
- No paywall or trial limitations on core features
- 3,200+ verified tags with collision detection
- 1,700+ sub-genres for precise sound targeting
- 430+ instruments with audio preview before selection
- 100-point prompt scorer with 15 validation checks
- Live collision warnings with one-click fix button
- 300+ bracket tags for line-by-line control
- AI lyrics writer in 12 languages built in
- Auto song-structure detection for pasted lyrics
- Open-source scorer on npm with MIT license
- Public REST API available without auth or rate limits
- Works in 12+ languages including Hebrew, Japanese, Chinese
- Auto mode for non-musicians skips music theory
- Prompt library saves builds locally for reuse
- Export as Text, JSON, or PNG image for sharing
- Keyboard shortcuts for faster workflow
- Research hints on every step teach Suno mechanics
- Color-coded live preview panel builds in real time
- Auto-save resumes builds days later locally
AceTagGen cons
- AI Chat producer costs $7/month with 300 requests limit
- Requires understanding of Suno AI to use effectively
- Music theory depth may overwhelm complete beginners
- No mobile app, web-only interface
- Local auto-save means no cloud backup across devices
- Prompt library limited to browser storage
- No official Suno AI integration or partnership
- 1,000-character Style field limit enforced strictly
Frequently asked questions about AceTagGen
What is AceTagGen and what does it do?
AceTagGen is the most comprehensive SUNO AI tag building tool that helps you stop guessing and start producing professional Suno prompts. It features a smart 12-step system with 3,200+ verified tags, 1,700+ sub-genres, 430+ instruments, live collision detection, a 100-point quality scorer, and line-by-line Song Editor. The tool builds production-grade Style + Lyrics prompts in under 90 seconds that Suno actually responds to.
Is AceTagGen free to use?
Yes, the core Tag Builder 12-step system is completely free with no signup needed, no paywall, and no trial. You get access to all 3,200+ verified tags, the 100-point prompt scorer, collision detection, Song Editor with 300+ bracket tags, AI lyrics writer in 12 languages, prompt library, and export options. Only the AceTagGen AI Chat producer costs $7/month.
How does the 100-point prompt scorer work?
The scorer runs prompts through a 15-point validation grid checking character limit compliance, tag weight ordering, per-category limits, invalid tag detection, genre collision detection, strong vs weak tokens, sub-genre specificity, bracket syntax validation, hardware token preference, vocal delivery validation, version awareness, tag density check, bracket tag count per section, multi-language compatibility, and produces a final weighted score normalized to 100 points with color-coded breakdown.
What are bracket tags and why are they powerful?
Bracket tags in the Lyrics field like [whispered] or [Chorus] are up to 10× more powerful than the same tag in the Style field. They act as directors that Suno doesn't sing but follows for vocals, transitions, and effects line-by-line. The Song Editor exposes 300+ bracket tags for emotion, voice changes, stutters, echoes, crowd vocals, with placement directly before lyric lines for dramatic effectiveness.
Do I need to know music theory to use AceTagGen?
No, Auto mode lets you skip all music theory with one click. Auto mode picks genre-appropriate defaults for keys, modes, scales, progressions, time signatures, groove, and tempo. The depth is there when you're ready, but 'I don't know music theory' isn't a barrier. The system has defaults at every step for non-musicians.
What languages does AceTagGen support?
AceTagGen works in 12+ languages including English, Hebrew, Spanish, Portuguese, Japanese, Chinese, French, German, Korean, Italian, Russian, and Turkish. The AI lyrics writer generates lyrics in 12 languages matching your genre, mood, and structure. Research is drawn from Suno communities worldwide including US, Brazil, Japan, Germany, Spain, Korea, France, China, India, Mexico, and Italy.
How does collision detection work?
Live collision detection catches conflicting tag pairs instantly like lo-fi + crisp, calm + aggressive, or jazz + electronic. The system flags 100+ known collisions with specific reasoning and provides a one-click Fix button. It also catches mood contradictions like whispered + powerful or melismatic + monotone, and production style conflicts before you waste credits.
Can I save and reuse my prompts?
Yes, the prompt library lets you save builds to your personal collection where you can rate, filter, remix, and reuse them. Auto-save preserves every choice locally so you can step out mid-build and resume days later exactly where you left out. All builds end with clean Style fields, structured Lyrics, Quality Scores, and one-click copy. Export as Text, JSON, or PNG image.
What is the AceTagGen AI Chat producer?
AceTagGen AI is a paid $7/month feature that provides an AI trained on the full research system with tag weighting rules, bracket power hierarchy, Suno version-specific behaviors, and genre-specific instrument mappings across 1,700+ sub-genres. Describe your song in plain language and it returns production-grade Style + Lyrics + tag sets structured exactly how Suno responds best. Includes 300 requests per month and works in multiple languages.
Is the scoring algorithm open source?
Yes, the core scoring algorithm is open-source under MIT license as the npm package suno-prompt-scorer. It's a standalone MIT-licensed extraction of the scoring engine that works with no auth, no rate limits, and no cost. Developers can integrate the 100-point prompt validator into their own tools. A public REST API at acetaggen.com/api/suno-score and Gradio Space on HuggingFace are also available.