
ContrastKit
Check WCAG contrast, then fix failing colors in one click.
tuning the feed…
Single-file tools, calculators and little games shipped end-to-end with Claude Code — no login, free to try, and the source is often downloadable. Every build ships with an auto-generated 10-second trailer of it working. New Claude Code launches land on the feed continuously.

Check WCAG contrast, then fix failing colors in one click.

A daily lights-out puzzle. Flip every tile off, beat par.

Forge gorgeous CSS gradients and export them anywhere.

Forge color palettes you can actually ship.

Facturas profesionales con IVA e IRPF y PDF en un clic.

Inspect any JSON: live tree, search, one-click dot-paths.

Drag-and-drop sales pipeline that lives entirely in your browser.
A tiny retro studio for drawing crisp pixel-art sprites.

QR codes forged from scratch — full ISO/IEC 18004, zero libraries.

Test regex live: highlighted matches, groups, replace preview.

One-click project timers with a week view and billable totals.

Live character, word & token counts with platform limit bars.

Zen typing speed test with live WPM, accuracy, and sparklines.

Divide gastos de grupo y salda cuentas con los pagos mínimos.

A serene pomodoro dial: focus cycles, gentle chimes, daily tally.

Streak-first habit tracker with a 12-week heatmap.

Write Markdown on paper-warm cream, watch it render live.

A live € meter that shows what your meeting really costs.

One value in, every unit in the category out — instantly.

Forge strong passwords & passphrases, entirely in your browser.

See what your loan really costs — and how extra payments beat it.

Decode any cron expression: plain English, next runs, live grid.

See how a small monthly habit grows into real money.

Pedal a food-delivering capybara through a 3D city of capybaras.

A big-ring interval timer for HIIT, Tabata & circuits.

Find the exact unit where your product starts making money.

Shape CSS easing curves you can feel, then copy the code.

A beautiful live countdown to any date, ticking in real time.

Follow the orb through calmer breaths — box, 4·7·8, coherent, relax.

A metronome with a real swinging pendulum.

Find the meeting time that wakes the fewest people worldwide.

Browse every independent coffee shop in Minneapolis and Minnesota.

A calm, classic sudoku with pencil notes and a quiet timer.

Layered SVG waves for your next hero section.
Your turn
Submit your build and we'll auto-generate its 10-second trailer.