Working with photos

Supported files

Click Upload your photo in the left sidebar, or drag a file onto the canvas.

• Photos: JPG, PNG, WEBP, HEIC and HEIF.
• Camera RAW Pro: Canon (.cr2, .cr3), Nikon (.nef, .nrw), Sony (.arw), Fujifilm (.raf), Panasonic (.rw2), Olympus (.orf), Pentax (.pef) and DNG.
• Video: MP4, MOV and WEBM. See Working with video.

Opening several photos

You can have more than one photo open. Select several files in the picker, or drag them onto the canvas together. They appear as thumbnails under the canvas, and clicking one puts it on the canvas. There's a walkthrough on the blog.

• One look for all of them. Every open photo is shown with the same grade. Switch between them to check a look across a shoot.
• Exposure and white balance per photo. With more than one photo open, Basic Correction shows a This photo only group. Use it to even a photo up with the others without changing them.
• Add and remove. Click the + tile to add more. Select or hover a thumbnail and click its × to take it out.
• Exporting saves the photo on the canvas. Click the next thumbnail to save that one.
• How many: 3 on a free account, 12 with Pro. Each photo is held at full size in your browser, so 12 is a memory limit.

A video joins the strip too, as the frame it is stopped on, with a player under the canvas. See Working with video. Every kind of photo Luttie opens can be in the set, including RAW and TIFF files. A RAW photo keeps its camera details and white balance setting while you work on the others, and they come back when you switch to it again.

RAW files

A RAW file is the unprocessed data from a camera sensor. It holds more highlight and shadow detail than a JPG, so it stands up to heavier grading. Luttie decodes RAW files in your browser with LibRaw, the same open-source decoder many desktop apps use. A large file can take several seconds to decode on a slower computer.

RAW decoding is part of Luttie Pro. Without Pro, save a JPG from your camera software first and load that.

Your photo stays on your computer

Loading and grading a photo happens entirely in the browser. It isn't uploaded to Luttie's servers. The exceptions are features that have to send something: AI Grade and Grade Chat send an image to the AI model to analyse it, and Send to phone uploads the file you choose so your phone can download it.

Zooming and the sample image

Use the zoom control under the canvas to inspect detail, and double-click to zoom back to fit. When you open the editor without a file, it shows a sample image so you can try the controls straight away. The label under the canvas tells you which one you're looking at.