JPG To RAW Converter

Technically, converting JPG to RAW creates a RAW-compatible container file around your JPG image data. It does not restore the original camera sensor data that was discarded during JPG compression. The resulting file can be opened in RAW editing software like Lightroom and Capture One, giving you access to non-destructive editing tools - but the actual image data and dynamic range remain identical to the source JPG.

Because RAW editing workflows require RAW-format files. Converting to RAW gives you access to non-destructive editing, professional color grading tools, batch preset application, and workflow compatibility with Lightroom catalogs and Capture One sessions. It also ensures all future edits are non-destructive - edits are stored as metadata rather than permanently altering the image data, unlike saving over a JPG file.

DNG (Adobe Digital Negative) is recommended for most users. It's an open standard supported by every major RAW processor - Lightroom, Capture One, DarkTable, RawTherapee, and GIMP. Choose brand-specific formats (CR2 for Canon, NEF for Nikon, ARW for Sony) only if your workflow specifically requires them - for example, if you need the file to appear as a native camera file in brand-specific software like Canon's Digital Photo Professional.

No. All conversion happens entirely in your browser using client-side JavaScript. Your JPG images are read, processed, and packaged into the selected RAW format locally on your device. No images are uploaded, transmitted, or stored on any server. This is especially important for professional photographers whose client images may be confidential or under NDA. The tool works offline once loaded.

Yes, significantly. RAW files store image data with minimal or no compression, resulting in files that are 10–25× larger than the source JPG. A 500 KB JPG photograph may become 5–15 MB as a RAW file. DNG with lossless compression produces the most compact RAW output. Ensure you have sufficient storage space before converting large batches of images, as the total output can be hundreds of megabytes.

Yes, Lightroom can import and edit JPG files directly - you don't strictly need to convert to RAW. However, editing a JPG in Lightroom still applies destructive changes when you export, and you get a more limited set of adjustment tools compared to RAW files. Converting to DNG first gives you the full non-destructive RAW workflow where all edits are stored as reversible metadata alongside the original data.

DNG (Digital Negative) is Adobe's open-standard RAW format, published in 2004 as a universal RAW specification. Unlike proprietary formats (CR2, NEF, ARW) that are controlled by camera manufacturers, DNG is fully documented and openly licensed. This makes it the safest choice for long-term archival because the format specification is publicly available and will remain readable indefinitely - unlike proprietary formats that could theoretically become unsupported.

We support nine RAW formats: DNG (Adobe, universal), CR2 (Canon), NEF (Nikon), ARW (Sony), RW2 (Panasonic), ORF (Olympus), RAF (Fujifilm), SR2 (Sony, older models), and PEF (Pentax). DNG is the most universally compatible option and is recommended unless you specifically need a brand-specific format for a particular camera software or workflow requirement.

No. Dynamic range is determined at the moment of capture by the camera sensor. JPG compression permanently discards highlight and shadow data to reduce file size. Converting to RAW cannot restore this lost information. The RAW file will contain the same 8-bit, limited dynamic range data as the source JPG. For true expanded dynamic range, you must capture RAW files directly in-camera at the time of shooting.

Yes, batch conversion is fully supported. Select multiple JPG files and convert them all to your chosen RAW format simultaneously. Download each RAW file individually or use "Download All (ZIP)" for a single archive. Note that RAW files are very large - a batch of 20 photographs may produce 200–400 MB of data. Process in smaller batches if your device has limited memory.

Input files up to 100 MB are supported. RAW output will be significantly larger - typically 10–25× the JPG size. A 12-megapixel JPG photo produces approximately 15–35 MB of RAW data depending on the format chosen. Browser memory is the practical constraint. For best performance, process 5–10 high-resolution images at a time on standard devices, or more on machines with 8+ GB RAM.