Simulate color blindness: preview designs through protanopia, deuteranopia, and tritanopia filters — catch invisible-to-some UI. Fix red-green errors before users suffer — local Canvas work, free, no signup.
Runs on Canvas
Content reviewed October 2026 · About Toolzum
Design CSS borders visually — width, style, color, and radius with live preview and copy-ready code. Prototype a card border in 30 seconds — free, local, no signup.
Generate initial-based avatars with custom colors, fonts, and sizes — profile placeholders in seconds. Ship default user pics that look designed — local Canvas work, free, no signup.
Design CSS gradients — linear, radial, conic — with multi-stop color control and live preview. Ship mesh-grade backgrounds from code — local generation, free, no signup.
Grade videos with 18 filters across Color, Artistic, Blur, and Lighting (grayscale, sepia, pixelate, gaussian blur, vignette, brightness/contrast/saturation) plus a live still-frame preview. Export MP4, WebM, or GIF — local FFmpeg work, unlimited saves.
Grade photos with 6 one-click filter presets — Vintage, Noir, Vibrant, Cool Tone, Warm Glow — plus 6 manual sliders (brightness, contrast, saturation, blur, sepia, grayscale) rendered live through canvas filters at full source resolution. Exports JPEG at quality 0.95 as enhanced-<name>; nothing uploads.
Protanopia (red-blind), deuteranopia (green-blind), tritanopia (blue-blind), plus monochromacy. Red-green forms affect ~8% of men.
Red/green status dots, error text in red alone, and captcha colors. Pair color with icons or text always.
Never encode meaning in color alone; check contrast in simulated views. Fix once, benefit every color-blind user permanently.
No — simulation runs locally in your browser on Canvas. Nothing leaves your device.
Contrast Ratio Checker
Check any color pair's WCAG contrast ratio with AA/AAA verdicts for normal and large text. Prove 4.5:1 before shipping — free, local, no signup.
Color Converter
Convert colors between HEX, RGB, and HSL with a type-and-convert text UI. Translate brand specs across formats — free, local, no signup.
Color Palette Generator
Generate a fixed 6-color palette from a base color at set hue offsets (+30/+60/+120/+180/+210). Click any swatch to copy its HEX. Work never leaves your device — everything renders locally in your browser.