Raw Image Data (.RAW)
RAW is a general term for unprocessed image data files captured directly from a camera's image sensor, though the .raw extension itself is sometimes used as a generic raw container. Different camera manufacturers use various proprietary raw formats, but files labeled .raw contain minimally processed sensor data preserving maximum detail and dynamic range. These files require specialized software to develop into viewable images.
Advantages of Raw Image Data
What the RAW format does well, and why you might choose it.
- Contains the maximum possible image data from the camera sensor
- Provides full control over white balance, exposure, and color in post-processing
- Much higher dynamic range than processed JPEG output
Limitations of Raw Image Data
What the RAWformat doesn't do well, and when to choose another format.
- Generic .raw extension can cause compatibility issues with software detection
- Very large file sizes compared to processed image formats
- Cannot be displayed directly without raw processing software
What RAW files are used for
- Generic raw image capture from various camera systems
- Raw image data from scientific and industrial imaging sensors
- Intermediate data storage in image processing workflows
How RAW files work
Raster images are grids of pixels, each carrying color information. The format determines how those pixels are stored: lossless formats (PNG, TIFF, BMP, WEBP-lossless) preserve every pixel exactly, lossy formats (JPG, WEBP, AVIF, HEIC) discard imperceptible detail to shrink the file. Color depth (8-bit, 10-bit, 16-bit), color profile (sRGB, Display P3, ProPhoto), alpha channel support, and metadata (EXIF, IPTC, XMP) all vary by format. Modern web formats like AVIF and WEBP build on improvements in video compression to deliver dramatically smaller files at equivalent quality versus JPG and PNG.
Best practices when working with RAW
Photographs compress well as JPG or AVIF; graphics with sharp edges, text, or transparency belong in PNG or WEBP-lossless. Never re-save a JPG repeatedly — every save adds compression artifacts. Strip EXIF metadata before publishing photos publicly if you don't want GPS coordinates and camera serial numbers exposed. For print, deliver in TIFF at 300 DPI; for screen, JPG/WEBP at 72-100 DPI is plenty. If you're optimizing for the web, AVIF beats WEBP beats JPG on file size, but JPG still has the broadest support.
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Choosing RAW versus the alternatives
JPG: photographs, social media uploads, anywhere universal compatibility matters. PNG: graphics with text, line art, screenshots, or transparency. WEBP: modern web replacement for JPG and PNG with better compression. AVIF: best-in-class web compression, growing browser support. TIFF: print and archival masters. BMP: rarely the right answer in 2026 — uncompressed and uniform-poor versus PNG. HEIC: efficient mobile photo capture, but limited compatibility outside Apple's ecosystem.
Where RAW fits in real workflows
Most image workflows have a master file (PSD, RAW, TIFF) that you keep forever and never publish, plus delivery exports (JPG, WEBP, AVIF) generated for each context where the image appears. Treat published files as derivatives — if quality requirements change, regenerate from the master rather than re-converting an already-compressed version.
Privacy and file handling
When you convert a RAWfile with MegaConvert, the file is uploaded to our converter, processed, and automatically deleted within an hour. We don't train models on your files, share them with third parties, or retain them after the conversion completes. The download link expires when the file is removed. If your work involves files subject to NDA or compliance requirements (HIPAA, GDPR data processing), please review our privacy policy before uploading sensitive material.
Frequently asked questions about RAW
What is a .RAW file?
RAW is a general term for unprocessed image data files captured directly from a camera's image sensor, though the .raw extension itself is sometimes used as a generic raw container. Different camera manufacturers use various proprietary raw formats, but files labeled .raw contain minimally processed sensor data preserving maximum detail and dynamic range. These files require specialized software to develop into viewable images.
What is the MIME type of RAW?
The official MIME type for RAW files is application/octet-stream. This is the value web servers and applications use to identify the format when transferring files.
What category does RAW belong to?
RAW is a Image Converter format. Files in this category share common conversion paths and use cases.
How do I open a .RAW file?
RAW files are typically opened by software that natively supports the Raw Image Dataformat. If you don't have a compatible application, the most reliable approach is to convert the file to a more universal format using the converters listed above. Most Raw Image Data files convert to widely-supported alternatives in seconds.
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