Song Co-Writing is a free, open-source songwriter's toolkit that runs in your browser. No AI, no accounts, no subscriptions — every word you write is 100% yours.
No sign-up required. Your data stays on your device.
Perfect, near, and slant rhymes from a curated word bank — instant results without any API calls.
From Love to Bitter, each mood comes with themed nouns, verbs, adjectives, and phrases to spark ideas.
Real-time syllable counts per line with word-by-word breakdowns to keep your meter tight.
18 mood-matched progressions transposed to any key. Starred suggestions match your current vibe.
Full verse, chorus, bridge, and hook generation from curated templates — no AI, just clever combinatorics.
Pop, Hip-Hop, Trap, Lo-Fi, K-Pop, Gospel, Blues, and more — one-click song structures to get started fast.
Built-in synonym finder with forward and reverse lookup to find the perfect word every time.
Your work auto-saves to your browser. Export to .scw project files, plain text, or PDF anytime.
Everything stays in your browser via localStorage. No servers, no telemetry, no tracking — ever.
MIT License · Source on GitHub