ARW to OTB — Format Comparison & Online Converter
Fast, instant ARW (SONY) to OTB conversion. No signup required. Just drop your .arw file and get .otb in seconds.
Batch Settings
About ARW (SONY) to OTB Conversion
ARW (introduced 2006) and OTB are both image formats, but they differ in important ways. ARW is Sony's RAW photo format preserving the full dynamic range captured by the sensor. OTB is a widely used file format.
When you convert ARW to OTB, the goal is to convert between formats quickly. Converting ARW to OTB maintains high quality with CocoConvert's optimised encoder settings. Understanding these technical differences helps you choose the right format for your workflow.
Your ARW file is decoded and re-encoded as OTB. The conversion involves 4 steps: (1) your arw file is uploaded and validated, (2) the file is decoded (parsed into its raw data), (3) the data is re-encoded in otb format, (4) the converted file is ready for download.
CocoConvert's converter handles the entire pipeline server-side using FFmpeg, Sharp, and qpdf — battle-tested libraries used by streaming platforms and enterprise tools. Files are encrypted in transit and deleted within 24 hours.
This conversion is ideal when you When you need a OTB file. For the opposite direction, CocoConvert also supports OTB to ARW conversion.
How to Convert ARW (SONY) to OTB
- 1
Upload .arw file
Select your ARW file by dragging it to the upload zone or using the file picker. Batch upload is available for multiple files.
- 2
Choose .otb
Set OTB as the output format. The converter uses optimal settings based on the ARW→OTB conversion profile.
- 3
Convert
The server-side engine decodes your ARW file and re-encodes it as OTB. Processing time depends on file size and complexity.
- 4
Download result
Grab your converted .otb file. Multiple output files can be downloaded together.
What Happens When You Convert ARW (SONY) to OTB
Your ARW file is decoded and re-encoded as OTB.
Your ARW file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in OTB format
The converted file is ready for download
Format Comparison
ARW (Sony)
.arw file
| Extension | .arw |
| MIME Type | image/x-sony-arw |
| Category | Image |
OTB
.otb file
| Extension | .otb |
| MIME Type | image/x-otb |
| Category | Image |
Should You Convert ARW (SONY) to OTB?
When to Convert
- ✓When you need a OTB file
Frequently Asked Questions
What is the difference between ARW and OTB?
ARW is Sony's RAW photo format preserving the full dynamic range captured by the sensor. OTB is a widely used file format.
Does ARW to OTB conversion affect quality?
Converting ARW to OTB maintains high quality with CocoConvert's optimised encoder settings.
Which format has better compression, ARW or OTB?
ARW uses lossless compression. OTB is widely supported. The better choice depends on whether you prioritize file size or quality.
How long does ARW to OTB conversion take?
Most conversions finish in seconds. Larger files or complex image content may take 10–30 seconds. CocoConvert processes files in parallel for batch jobs.
Is ARW or OTB better for long-term storage?
ARW is better for archival since it's lossless.
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