🖼️ 画像・カバー
Resize, convert, and design visuals。全17ツールがブラウザで無料実行できます。登録不要。
Convert colors between HEX, RGB, and HSL formats in your browser.
Build a full palette from a single base color.
Pick a color and convert Hex, RGB, HSL instantly.
Verify foreground/background color contrast for accessibility.
Create CSS gradients with live preview.
Create CSS box-shadow with live preview.
Create a small favicon from an image in your browser.
Compress JPG and PNG images to reduce file size right in your browser.
Convert images between JPG, PNG, and WebP formats entirely in your browser.
Crop any image to a custom size directly in your browser.
Flip or rotate an image right in your browser.
Turn a color image into grayscale in your browser.
Resize images to any dimension right in your browser. No upload required — your files never leave your device.
Encode images to Base64 data URIs and decode them back, all in your browser.
Stamp a text watermark onto an image locally.
Produce a light-to-dark shade ramp from any color.
Spot the line-level differences between two texts.