Convert vintage Atari ST NeoChrome (.neo) graphics into pixel-perfect 32-bit RGBA PNG images directly in your browser. 100% private client-side planar bitplane decoding with zero server uploads.
Detailed side-by-side format architecture for NEO Graphic Raster (.neo) and Portable Network Graphics (.png). Every conversion executes strictly within isolated browser memory without network transit.
Drag and drop your .neo file onto the working surface or use the system file dialog. File magic bytes are verified locally on device.
Select a quality preset (Lossless, Visually Lossless, Balanced, Smallest) or adjust advanced encoding switches in the options panel.
Click CONVERT to execute local WebAssembly compilation. Save the finished .png directly to local storage, or stage it for chaining.
Prefer local shell scripting? Run this standard POSIX command on your machine to achieve equivalent transcoding without a web interface:
# Convert NEO to PNG locally
magick input.neo output.pngWorking with files across multiple web pages? The official convrtr Chrome Extension adds native Side Panel docking, right-click context menu media extraction, and visible viewport capture. Powered by the same zero-upload client-side WebAssembly engine.
A technical comparison between Dave Staugas's NeoChrome (.neo) and Tom Hudson's DEGAS Elite (.pi1 / .pc1). Explore Atari ST 4-bitplane planar architectures, 12-bit hardware palettes, and color animation.
Detailed technical comparison between PNG and JPG (JPEG). Understand lossless vs lossy compression, alpha channel transparency, and file size optimization.
Compare WebP and PNG file sizes, transparency handling, browser support, and compression performance for web graphics and illustrations.
NeoChrome (.neo) was the flagship paint software created by Dave Staugas at Atari Corp in 1985. It is a 32,128-byte uncompressed image format consisting of a 128-byte header (storing resolution, color cycling tables, and 16 Atari ST 12-bit RGB palette colors) followed by 32,000 bytes of planar screen memory.
Modern operating systems and image viewers do not support Atari ST 4-bitplane graphics formats. Converting .neo files to PNG extracts the pixel data and color palette, allowing retro pixel art, scene demos, and classic game title screens to be displayed and preserved anywhere.
The converter reads the 128-byte NeoChrome header, decodes the 16-color Atari ST palette (converting 3-bit and STE 4-bit color components to standard 8-bit sRGB), and transforms interleaved 16-pixel word bitplanes into continuous chunky 32-bit RGBA pixel buffers.
Never. All decoding, color mapping, and PNG encoding execute entirely client-side inside your browser's local memory. Your files are never uploaded or stored on any server.
NEO Graphic Raster (NEO) and Portable Network Graphics (PNG) serve distinct roles across the digital workflow. Converting to PNG provides optimized compatibility, modern compression efficiency, or standardized playback across web browsers, operating systems, and media production environments.
The output format (PNG) is inherently lossless or supports lossless operation. Your original visual or audio fidelity is mathematically preserved without quantization artifacts.
Never. convrtr is architected with a strict zero-upload model. All processing, decoding, decompression, and encoding happen 100% locally on your machine using sandboxed WebAssembly and Web Workers. Your data never touches an external server, database, or analytics collector.
You can execute this conversion locally via command-line utilities such as ffmpeg, cwebp, or ImageMagick. For example: see the developer terminal recipe provided in the technical specifications dossier above. convrtr provides the identical local-first capability directly inside your browser without installing CLI packages.
Yes. You can drop multiple .neo files into the instrument to process them concurrently in browser Web Workers, or click 'Open in Master Studio' to queue mixed formats, configure individual targets, and export as a single ZIP archive.
Explore Dave Staugas's Atari ST NeoChrome (.neo) graphics format. Learn how 128-byte headers, 12-bit hardware palettes, 4-bitplane planar RAM, and aspect correction decode to 32-bit RGBA PNG.
Explore Oxford Computer Systems' 1986 Advanced Art Studio graphics format. Learn how Commodore 64 Hires and Multicolor bitplane structures, Screen RAM, Color RAM, and the authentic VIC-II palette decode into 32-bit RGBA PNG.