Convert Nintendo NES and Famicom 2bpp CHR tile ROM files (.chr) into pixel-perfect 32-bit RGBA PNG sprite sheets directly in your browser. 100% private in-browser decoder.
Detailed side-by-side format architecture for CHR Graphic Raster (.chr) and Portable Network Graphics (.png). Every conversion executes strictly within isolated browser memory without network transit.
Drag and drop your .chr 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 CHR to PNG locally
magick input.chr output.pngGame developer asset pipeline
Game developers routinely deal with engine archives, raw sprite sheets, and specialized GPU texture compressions. Extract Godot PCK and Ren'Py RPA game packages into ZIPs, convert Valve VTF and DirectDraw Surface DDS textures to transparent PNGs, and export Aseprite animations without launching heavyweight game editors.
Retro computing and vintage file recovery
Digital preservation often runs into forgotten 8-bit and 16-bit binary formats from the 1980s and 1990s. Decode 1984 Apple Macintosh MacPaint graphics, Commodore Amiga Deluxe Paint IFF bitmaps and 8SVX audio samples, classic MS-DOS PCX images, and PlayStation 1 TIM textures into modern PNG and WAV assets entirely in memory.
Working 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 Nintendo Entertainment System 2bpp CHR tile ROMs and standard 32-bit RGBA PNG images. Learn about planar bitplanes, 8x8 tiles, and sprite extraction.
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.
In Nintendo Entertainment System (NES) and Famicom game cartridges, CHR (Character) ROM or CHR RAM holds the 2-bit-per-pixel (2bpp) graphical tile patterns rendered by the NES Picture Processing Unit (PPU). Standard CHR banks are 8,192 bytes (8KB) containing 512 distinct 8x8 pixel tiles.
Each 8x8 tile is stored in 16 bytes: the first 8 bytes represent bitplane 0 (one bit per pixel across 8 rows), and the next 8 bytes represent bitplane 1. For each pixel, combining the two bits yields a 2-bit color index (0 to 3), which maps to one of four palette colors.
Yes! The exported file is a standard 32-bit RGBA PNG organized in a 16-tile grid (128 pixels wide). It imports directly into Unity, Godot, Aseprite, or GameMaker as a sliced sprite sheet.
Never. All bitplane reconstruction, palette mapping, and PNG encoding execute 100% locally inside your browser memory using pure TypeScript. No files or game data ever leave your device.
CHR Graphic Raster (CHR) 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 .chr 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.
Learn how Nintendo Entertainment System 2bpp planar tile graphics work, how 8x8 pattern tables are structured, and how to export .chr files to modern PNG sprite sheets.