RAW to WebP Converter
Convert RAW to WebP in your browser. The camera's embedded JPEG preview is what gets converted, not the sensor data; it matches what the camera showed on its screen. No raw development happens here. You get a lossy WebP at the quality you choose (lossless under More options), keeping transparency. Nothing is uploaded.
- Processed locally
- No upload, no wait
- No sign-up
- No watermark
Drop images here
or choose files · paste with Ctrl/⌘ V
RAW expected · other image formats also work
How to use RAW to WebP
- 1
Add your RAW files: drop them here, choose them, or paste from the clipboard.
- 2
Set the quality. 80 to 85 is visually close to the original for most photos.
- 3
Click Convert. Each file is decoded and encoded in a background thread on this device.
- 4
Download the .webp files one at a time or together as a ZIP.
Why use Aback Images for raw to webp
Where the WebP goes next
WebP opens in every current browser, Windows, macOS, Android, and recent Photoshop, GIMP and Affinity.
WebP next to RAW
The WebP is made from the camera's 8-bit preview, so it is a small fraction of a 20 to 80 MB raw file.
A second JPEG generation
The pixels come from the JPEG preview the camera embedded in the RAW, so they have been compressed once already; keep the quality at or above the default.
Processed on your device
Your images are decoded, edited and encoded inside this browser tab by Web Workers. Nothing is uploaded to a server.
RAW vs WebP
What changes from RAW to WebP
Encoding: the RAW uses uncompressed, lossless JPEG or vendor-specific coding of the sensor data, depending on the maker; WebP uses lossy VP8 coding or lossless VP8L, and the download is a lossy WebP at the quality you choose (lossless under More options), keeping transparency.
Bit depth: 12 to 16 bits per channel in the RAW; WebP allows 8 bits per channel, and the WebP written here has 8 bits per channel. The sensor's 12 to 16 bits are not used: the camera's 8-bit preview is converted.
Colour: camera-native RGB from a colour filter mosaic in the RAW; WebP supports RGB; lossy WebP stores colour at half resolution (4:2:0), written here as 8-bit sRGB.
Metadata: the RAW can carry EXIF and vendor maker notes, almost always with an embedded JPEG preview; WebP can carry EXIF, XMP and ICC chunks, but nothing is copied across.
About RAW
Camera RAW files (CR2, CR3, NEF, ARW, DNG, ORF, RW2, RAF and others) hold the unprocessed sensor data from a camera along with an embedded full-size JPEG preview rendered by the camera.
.RAW is an extension rather than one format. Panasonic and Leica compacts wrote TIFF-like .RAW files before Panasonic moved to RW2, and scanners and scientific cameras use .raw for headerless dumps with no width, height or layout recorded, which nothing can read without being told those values.
RAW files usually come from older Panasonic and Leica compacts that saved .RAW, and scanners or scientific cameras that use the extension for pixel dumps.
About WebP
WebP is Google's web image format. It supports lossy and lossless compression, transparency and animation, and is typically 25 to 35 percent smaller than JPEG at the same visual quality.
A WebP is a RIFF file: 'RIFF', a length, 'WEBP', then chunks. A simple lossy file is one VP8 chunk and a lossless one is VP8L; the extended VP8X header announces alpha, animation, ICC, EXIF or XMP chunks.
When converting RAW to WebP makes sense
WebP is the better choice for images on websites and in apps, while RAW suits editing in Lightroom, Capture One or darktable.
WebP strengths: 25-35% smaller than JPEG; Transparency and animation in one format; Supported by every modern browser. Drawbacks to weigh: Some older desktop apps and photo printers cannot open it; Max 16383 px per side.
Limitations
- A headerless .raw pixel dump has no preview and no size information, so it cannot be converted here.
- A few older desktop apps, print services and upload forms still reject WebP; keep a JPG or PNG copy for those.
- WebP images are limited to 16383 pixels on each side.
More conversions
Related tools
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Frequently asked questions
Does converting RAW to WebP lose quality?
WebP is lossy, so detail the eye barely notices is discarded to save space. The RAW's preview is a camera JPEG already, so keep the quality high to avoid stacking artefacts. The sensor's 12 to 16 bits are not used: the camera's 8-bit preview is converted.
Does this process the RAW sensor data?
No. Camera RAW files carry a JPEG rendered by the camera when the picture was taken, and that is what gets converted, so the result matches what you saw on the camera screen. For full development (white balance, highlight recovery, lens corrections) use a RAW editor.
What quality should I choose for WebP?
80 to 85 is visually close to the original for most photos. Go lower for thumbnails, or switch on Lossless under More options for screenshots and graphics.
Which apps open WebP files?
Every current browser, Windows, macOS, Android, and recent Photoshop, GIMP and Affinity.
Are my images uploaded anywhere?
No. Processing happens inside your browser with WebAssembly and Web Workers. The site only downloads the app code and codecs; your files never leave your device. You can confirm this with the live upload counter on the tool, or in your browser's network panel.
Can I process many files at once?
Yes. Drop a whole selection or folder. Files are processed in parallel on several worker threads, each result can be downloaded on its own, and everything can be saved as one ZIP.
Is it free? Is there a file limit or watermark?
It is free with no account, no watermark and no daily limit. The only limit is your device's memory: very large images (over roughly 100 megapixels) may be refused to keep the tab from crashing.