umbra

countdown-overlay generator for roblox game icons — the white hourglass + bold countdown text over a darkened background.

• unlimited uploads — drag, paste (ctrl+v) or click
• live global style: bg darkness, hourglass size/position, text size/position, black outline + width
• per-icon editable countdown text
• one-click generate countdown set — turns one image into the whole sequence (24 hours → 12 → … → now!)
• per-icon duplicate · copy to clipboard · download png at native resolution
• download all as a zip
• saveable style presets · processed locally for privacy

roblox-style thumbnail grid generator.

• 5 formats (2×2 … 4×3), 3 ratios (16:9 / 1:1 / 4:5), gap + rounded corners
• drag / drop / paste, drag-to-reorder, per-slot upload
• filters (saturation · contrast · vignette) — applied in preview and export
• auto-arrange by engagement, presets, undo/redo (40 steps)
• boards — save a whole finished mosaic (grid, settings and images) and reload it later to keep editing
• png export at 1080p / 2k / 4k · remembers your work (indexeddb)

robux calculator suite.

• tax (30%, bi-directional) · gamepass reverse pricing
• devex (robux ↔ usd ↔ brl, precision mode)
• black market — parallel-market comparison vs the official devex rate
• live usd→brl rate with fallback + manual override

dark, near-black, monochrome. jetbrains mono throughout, lowercase-leaning ui, glassmorphism panels, a subtle film-grain + ambient particles. respects prefers-reduced-motion.

1 2 3 switch tools · ctrl+v paste images · ctrl+z / ctrl+shift+z undo / redo (mosaic)

vanilla html / css / js. zero build, zero dependencies (jszip is pulled from a cdn only when you export a zip). all image work is native <canvas>. runs straight from file:// or any static host.

index.html        # the whole app shell + the three tool panels
css/              # core design system + one file per tool
js/               # hub controller + one module per tool
assets/           # logo, favicon, og card, hourglass glyph

just open index.html, or serve the folder:

npx serve        # or:  python -m http.server

built by @gfxs0da · github @dgolaus

not affiliated with roblox corporation. robux, devex and related marks belong to roblox.