Tools
Free developer tools from atherio.dev — encode URLs, browse icons, and more.
Free developer tools from atherio.dev — encode URLs, browse icons, and more.
Percent-encode or decode query strings, UTM links, and sitemap URLs.
Browse 300k+ Iconify icons. Search by pack, filter outline or fill, and download.
Paste Kotlin data classes and generate sample JSON with nested types, defaults, and mock values.
Paste JSON and generate Kotlin data classes with package names, kotlinx.serialization output, and ZIP downloads.
Convert PNG, JPEG, WebP, GIF, and SVG with quality and size controls in your browser.
Resize by pixels or percentage and export batch ZIP archives.
Crop images to preset ratios or freeform selections with batch export.
Add corner radius, borders, and backgrounds to images.
Sample pixel colors and extract dominant palettes from images.
Rotate and flip images with global and per-image controls in batch.
Design Android and iOS app icons and download AppIcon.zip.
Remove selected colors with adjustable threshold and softness.