I built 30+ free browser tools for pixel artists in a weekend — here they are

In a weekend, a developer built over 30 free browser tools specifically designed for pixel artists and game developers. All these tools run entirely within the browser, meaning images never leave the user's machine. There is no installation required, no sign-up, no paywall, and no tracking. The tools are accessible by visiting a single webpage. You can find all the tools here: https://pennypenguinapp-beep.github.io/

The catalog includes a Palette Extractor that identifies the dominant colors in any image. A Palette Converter lets users switch between different color formats and palette styles. The Palette Reducer shrinks an image down to a specified number of colors, using dithering to maintain quality. The Palette Swap tool enables users to recolor a sprite by swapping one palette for another.

The Color Ramp generator creates smooth gradient strips between two colors. Colorblind Simulator allows users to see how their UI and sprites would appear to people with various types of color blindness. The Sprite Slicer and Sprite Packer tools help manage sprite sheets by cutting them into individual frames or packing loose sprites into a compact sheet.

Other tools include Sprite Transform, which flips, rotates, and mirrors sprites while preserving pixel alignment, and Sprite Outline, which adds a customizable outline to a sprite. A Sprite Animation Previewer lets users play back a sheet as an animation to check timing, while Pixel Upscaler scales sprites up in crisp or smooth quality.

Pixel Diff overlays two sprite versions to highlight changed pixels. Pixel Upscaler and Noise Texture generate higher resolution and tileable texture patterns, respectively. The Normal Map Generator converts heightmaps into normal maps for 3D-like lighting effects on pixel art. Grid Overlay helps users check alignment and spacing, while Tile & Level work tools assist in creating and editing tilemaps.

Tile Checker ensures tiles are seamless, Tilemap Collision Editor marks tiles as solid or walkable, Autotile Viewer previews autotile connections, Text & Misc tools include Font Builder, Pixel Font Preview, and Screenshot Framer. Hitbox Editor allows users to design and check character hitboxes, while Resolution Planner helps project teams plan target resolutions and aspect ratios.