InStudio – Free Instagram toolkit with 10 creator tools

Hey HN! I built InStudio — a free, browser-based toolkit for Instagram creators.

Everything runs locally (no server, no account, photos never leave your device). It's a single HTML file with vanilla JS.

10 tools included: - Grid Preview Planner (upload 9 photos, see your profile grid before posting) - Collage Maker (6 layouts, adjustable gaps, instant JPG download) - Caption Generator (60+ hand-written captions across 10 moods) - Hashtag Strategy Builder (3-tier breakdown: Mega/Medium/Niche tags) - Engagement Rate Calculator (benchmarks + personalized tips) - Bio Generator (5 styles instantly) - Font Styler (12 Unicode fonts that work in Instagram) - Color Palette Library (12 curated palettes with click-to-copy hex codes) - Best Time to Post guide - Aspect Ratio reference (every official Instagram format)

I built this because Instagram tools cost $15-30/month for features most creators only use 20% of. Figured there should be a free option that does everything in one place.

Tech stack is deliberately simple — 100% client-side, zero dependencies, works offline after first load. The whole thing is ~120KB.

Would love feedback from HN — especially on what tool I should add next, or if you'd pay for any features (trying to figure out monetization).

Live at: https://instudio.artboards.in/