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Supported Formats
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Web Formats
Joint Photographic Experts Group - the most universal image format for photographs using lossy compression. Reduces file sizes 90-95% with minimal visible quality loss. No transparency support. Perfect for photos, web images, email attachments, and any scenario requiring small file sizes. Adjustable quality levels from 1-100. Standard since 1992 with universal device and software support. Ideal for photographs and complex images with many colors.
Portable Network Graphics - lossless image format supporting transparency and 16 million colors. Larger files than JPEG but perfect quality preservation. Supports alpha channel for smooth transparency. Excellent for logos, graphics with text, screenshots, and images requiring transparency. Better compression than GIF for photos. Perfect for web graphics, UI elements, and any image needing lossless quality or transparency. Standard format for web graphics since 1996.
Web Picture format - modern image format by Google providing 25-35% smaller files than JPEG at equivalent quality. Supports both lossy and lossless compression plus transparency. Superior compression algorithms reducing bandwidth usage. Native browser support (96%+ coverage). Perfect for website optimization, web images, and reducing page load times. Combines best features of JPEG, PNG, and GIF. Recommended for modern web development.
Graphics Interchange Format - image format supporting animation and transparency with 256-color limitation. Small file sizes for simple images. Perfect for simple animations, emojis, memes, and graphics with few colors. Lossless for limited palette. Inefficient for photographs (use JPEG) or high-color graphics (use PNG). Universal support since 1987. Standard format for simple web animations and reaction images.
Scalable Vector Graphics - XML-based vector format rendering perfectly at any size. Infinitely scalable without quality loss or pixelation. Small file sizes for geometric shapes and illustrations. Editable with text editors and design software. Perfect for logos, icons, diagrams, and graphics requiring scaling. Supports animation and interactivity. Standard for responsive web graphics and resolution-independent designs. Essential format for modern web icons.
Icon File Format - specialized format for Windows icons containing multiple image sizes (16x16 to 256x256 pixels). Single file provides icons for all display resolutions. Used for favicons, application icons, and Windows shell icons. Supports transparency and multiple color depths. Perfect for website favicons, Windows program icons, and shortcut icons. Standard format for Windows icons since Windows 1.0. Essential for professional Windows applications.
AV1 Image File Format - next-generation image format based on AV1 video codec providing better compression than WebP and JPEG. 20-50% smaller files at equivalent quality. Supports HDR, wide color gamut, and transparency. Cutting-edge compression technology. Growing browser support (85%+ and increasing). Perfect for future-proof web images and maximum efficiency. Better quality at smaller sizes than any previous format. Recommended for modern websites prioritizing performance.
Bitmap Image File - uncompressed raster format from Microsoft providing pixel-perfect quality with large file sizes. No compression means huge files (1MB+ for screenshots). Fast to load and display. Simple format with universal Windows support. Perfect for temporary graphics, screen captures, and scenarios where compression artifacts are unacceptable. Legacy format largely replaced by PNG. Convert to PNG or JPEG for practical use and storage.
Tagged Image File Format - flexible format supporting multiple pages, layers, and various compression methods. Industry standard for professional photography, publishing, and archival. Supports lossless compression, 16-bit color depth, and extensive metadata. Large file sizes but excellent quality. Perfect for print publishing, photo archival, professional photography, and scenarios requiring maximum quality and flexibility. Used in medical imaging and professional scanning.
Professional Formats
Photoshop Document - Adobe Photoshop's native format preserving layers, effects, masks, and all editing capabilities. Supports 16-bit and 32-bit color depths for professional work. Large file sizes due to layer data and editing information. Perfect for ongoing design projects, professional photo editing, and collaborative design work. Not suitable for final output (export to JPEG/PNG). Essential format for professional graphic design and photo manipulation workflows. Industry standard for design files.
OpenEXR - high dynamic range image format developed by Industrial Light & Magic for visual effects and animation. Stores 16-bit or 32-bit floating-point values per channel enabling enormous dynamic range. Supports multiple layers, arbitrary channels, and lossless/lossy compression. Industry standard for VFX, CGI, and professional 3D rendering. Perfect for HDR photography, compositing, and scenarios requiring maximum color precision. Used extensively in film production and high-end visual effects.
High Dynamic Range Image - format storing luminance and color information with greater range than standard images. Captures and displays brightness levels impossible in JPEG/PNG. Uses 32-bit floating-point encoding. Perfect for realistic lighting in 3D rendering, environment maps, and HDR photography. Common in game development and architectural visualization. Enables realistic tone mapping and exposure adjustment. Essential for professional lighting workflows.
DirectDraw Surface - Microsoft texture format for games and 3D applications supporting compressed textures and mipmaps. Optimized for GPU loading with hardware-accelerated decompression. Stores multiple resolution levels (mipmaps) in single file. Standard format for game textures (DirectX, Unity, Unreal). Supports various compression algorithms (DXT1, DXT5, BC7). Perfect for game development, 3D modeling, and real-time rendering. Essential format for game asset pipelines.
Truevision TGA/Targa - raster graphics format supporting 8-32 bits per pixel with alpha channel. Uncompressed or RLE compressed for fast loading. Standard format for video editing, animation, and texture mapping. Excellent color accuracy with optional lossless compression. Perfect for video frame sequences, animation frames, and game textures. Widely supported in 3D software and video editing applications. Reliable format for professional media production.
JPEG 2000 - advanced image format using wavelet compression providing better quality than JPEG at equivalent file sizes. Supports lossless and lossy compression, progressive decoding, and ROI coding. Used in medical imaging, digital cinema, and archival. Better compression artifacts than JPEG. Slower encoding/decoding. Perfect for medical imaging, digital preservation, and applications requiring superior compression. Limited web browser support.
JPEG Stereo - stereoscopic 3D image format storing left and right eye views side-by-side or top-bottom. Based on standard JPEG with special arrangement for 3D viewing. Used for 3D photography, VR content, and stereoscopic displays. Compatible with 3D TVs and VR headsets. Perfect for 3D photography, stereoscopic content creation, and VR/AR applications. Requires special viewing equipment for proper 3D effect.
Portable Float Map - floating-point image format storing HDR color data. Simple format with 32-bit float values per channel. Used in computer graphics for HDR images and height maps. Uncompressed format with large file sizes. Perfect for HDR photography processing, displacement maps, and scientific imaging. Common in 3D rendering and simulation applications. Alternative to OpenEXR for simple HDR storage.
Flexible Image Transport System - scientific image format used primarily in astronomy. Stores astronomical images with extensive metadata headers. Supports multiple data arrays and tables. Standard format for astronomical data archives. Perfect for astronomical imaging, scientific data exchange, and research applications. Used by major observatories and space agencies worldwide. Essential format for astronomical research and data sharing.
How to Convert Files
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Frequently Asked Questions
What is a MAP file and why was this format created?
A MAP file is a **color palette file** used by older graphics programs, DOS-era games, texture tools, and sprite editors to store indexed color sets. Instead of embedding full color information in each pixel, MAP files store a limited collection of RGB entries that other files reference by index. This dramatically reduces memory usage, which was essential for early PC graphics, VGA/SVGA environments, and early game engines where memory and VRAM were extremely limited.
The MAP format became popular because it was simple, portable, and fast to parse. Games like DOOM, Quake, Build Engine titles, and many modding tools still rely on MAP palettes to define the entire look of their graphics, lighting, effects, and UI. MAP allowed consistent color themes while also enabling clever palette-shifting effects used in old games.
How is a MAP file structured internally?
MAP files vary by origin, but most versions follow predictable patterns:
Header or No-Header Variants
Some MAP files begin with a header defining the number of palette entries, while others store raw RGB triplets only with no metadata.
RGB Triplets
Classic MAP files store each palette entry as 3 bytes-Red, Green, and Blue-typically in the 0–255 range.
Fixed or Variable Entry Count
Some MAP versions assume 256 colors; others support custom sizes such as 16, 32, 64, or user-defined lengths.
No Metadata or Compression
MAP files contain no alpha channel, color names, gamma, ICC profiles, or compression. They are raw data blobs for fast lookup.
This makes MAP files extremely simple but also highly dependent on the exact software that produced them.
Where are MAP files used today?
Though old, MAP files still thrive in specialized workflows:
Retro Game Engines
Games like Doom, Heretic, Hexen, Duke Nukem 3D, and Quake use MAP palettes for level textures and color effects.
Pixel Art Tools
Programs like Aseprite, GrafX2, and Pro Motion NG import/export MAP palettes for retro-style pixel art.
Modding Tools
Modders use MAP palettes extensively when recoloring sprites, tiles, and UI assets.
Indexed Graphics Pipelines
MAP helps maintain controlled color sets across multiple exports for GIF, PNG-8, or quantized textures.
Legacy Software
Older 90s and early 2000s paint programs still reference MAP palettes for indexed images.
Scientific Visualization
Certain scientific tools use MAP-like palette files for segmentation colors and heatmap visualizations.
Embedded and Low-Memory Systems
Devices with basic displays-handheld consoles, custom LCDs, IoT panels-may still rely on small palettes stored as MAP files.
While not a modern mainstream format, MAP files continue to serve niche but important roles.
Why do some MAP files fail to load correctly?
Different tools use incompatible MAP specifications-some use headers, some do not, and some divide values by 4 (0–63 VGA mapping).
Some MAP files include extra bytes for padding or alpha channels, which confuse strict RGB-only readers.
If a MAP file does not contain exactly the number of colors expected by the program (often 256), it may be rejected.
How does MAP compare to PAL, ACT, GPL, and other palette formats?
PAL files (JASC, Microsoft, others) differ in layout and may store headers or reserved bytes, while MAP is often raw RGB.
ACT (Adobe Color Table) always stores exactly 256 colors; MAP supports variable palette sizes depending on the generator.
GPL (GIMP Palette) is human-readable text; MAP remains binary-only with no names or metadata.
Does the MAP format support alpha transparency or extended color data?
No-MAP was designed in a time when transparency wasn’t commonly needed, so most MAP variants do not support alpha.
Some rare custom MAP versions include a fourth byte per pixel for alpha, but this is not standard.
If transparency is required, a specific palette index is usually designated as the transparency index externally.
Why do indexed images look wrong when the wrong MAP file is applied?
Indexed images map each pixel to a palette entry, so applying the wrong MAP file completely changes the resulting colors.
Old games used palette cycling and lighting effects; using incorrect MAP files breaks these intended effects.
Palette order matters-one swapped position can alter a large portion of an image.
Why do MAP conversions sometimes fail?
MAP conversion issues usually arise from differences in palette layout:
Different Entry Counts
Some MAP files contain 256 entries; others contain far fewer or more, causing mismatch errors.
Unexpected Header Data
Tools expecting pure RGB may fail when encountering headers or metadata bytes.
Non-Standard Variants
Game engines often use their own MAP structures, which are incompatible with generic editors.
Value Scaling Differences
Some MAP formats store colors in 0–63 VGA scale rather than 0–255, causing conversions to appear dark or washed out.
Byte Alignment Issues
Some files store padding bytes, which offset color positions and cause parsing failures.
Tools like ImageMagick, Aseprite, and GrafX2 tend to handle most MAP variants reliably.
Does MAP support metadata, EXIF, or color profiles?
No-MAP was designed to contain only raw RGB values with no supporting metadata.
MAP does not store gamma correction, white balance, ICC profiles, or color space information.
All additional information must be managed externally or by the host application.
What modern uses does MAP still have?
MAP remains useful in many retro or constrained workflows:
Sprite Recoloring
MAP allows fast recoloring of sprite sheets without re-exporting entire assets.
Game Modding
Classic engines still rely on MAP palettes, so modders use them to adjust game visuals.
Embedded Hardware
Devices with limited display memory rely on fixed palettes stored in MAP format.
Quantization Reference
Developers save MAP palettes as quantization targets for image compression workflows.
Unix and CLI Tools
Netpbm, ImageMagick, and other Unix CLI tools can load and apply MAP palettes to indexed images.
Lightweight Asset Management
For tiny games and demos, MAP palettes keep assets extremely small.
Retro Engine Restoration
Restoring 90s PC games requires correct MAP palettes to maintain accurate visuals.
Scientific Visualization
MAP palettes define colormaps in segmentation and region detection workflows.
Simple Monochrome or Indexed Systems
Certain low-color monochrome simulators use MAP-style palettes for quick lookup.
Demoscene and Pixel Art
Artists rely on fixed MAP palettes to emulate era-accurate colors.
Why are MAP files so small?
They contain only RGB color entries and no pixel data.
Even a 256-color MAP palette is only 768 bytes when stored as pure RGB.
There is no metadata, compression, or headers unless added by specific vendors.
How large can MAP files get?
Most MAP files are under 1 KB because they only store palette data.
Even extended variants rarely exceed 2–4 KB.
Only custom MAP formats containing extra fields may grow larger.
Does MAP support multiple palettes?
No-each MAP file holds exactly one palette.
If multiple palettes are needed (such as lighting or seasonal variations), they must be stored as separate MAP files.
Some retro engines swap MAP files dynamically to simulate animation or tinting.
Why do different MAP files have different color counts?
MAP does not enforce any specific palette size; software defines how many colors to store.
Older hardware often used 16-color or 64-color palettes, not 256.
Image quantizers may generate MAP palettes with any number of colors depending on compression settings.
Is the MAP format still relevant?
Yes-MAP files remain important for pixel art, retro game development, and engine modding.
Their simplicity makes them ideal for environments where tight control over small indexed palettes is required.
While modern formats have surpassed indexed workflows, MAP files still thrive in retro, artistic, scientific, and embedded system use cases.
About the MAP Format
MAP is a file format used in specific workflows. The exact characteristics depend on the implementation and chosen settings.
- Format Type
- File format
- Origin
- Industry-developed format
- Common Uses
- Various applications that support MAP
- Compression
- Depends on implementation
Sources and References
Format details on this page are based on the official specifications and documentation below.
- Image file type and format guide- MDN Web Docs