Sony Raw Image (.ARW)

Advantages of Sony Raw Image

What the ARW format does well, and why you might choose it.

• Preserves full unprocessed sensor data for maximum post-processing latitude
• Supports both compressed and uncompressed raw storage options
• Well-supported by major photo editing applications including Lightroom and Capture One

Limitations of Sony Raw Image

What the ARWformat doesn't do well, and when to choose another format.

• Proprietary format with no publicly available specification
• Large file sizes, especially in uncompressed mode
• Requires raw-capable software for viewing and editing

What ARW files are used for

• Professional photography with Sony Alpha series cameras
• Raw photo editing and non-destructive development
• High-quality archival of photographic captures

How ARW 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 ARW

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.

Convert to ARW

The most common formats people convert to ARW, ready to convert in seconds.

Convert ARW to other formats

Convert Sony Raw Image files into the format you actually need.

Choosing ARW 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 ARW 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 ARWfile 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 ARW