Ruah

Cut the main subject out of a photo and make the background transparent (on-device AI — the image never leaves this computer). Saves a transparent PNG and returns its path plus a small preview. Use for "remove the background", "cut out", "transparent background", "누끼", product and profile photos. The PNG is lossless and large; to make it smaller, pass it to `compress` with format webp or png (jpeg cannot be transparent). The first call downloads a ~98 MB model once.

Make an image file smaller with little visible quality loss, on-device (same encoders and defaults as ruah.tools). Saves a new file and reports the size before and after; the original is never changed. Formats: keep = same format as the input; webp = usually the smallest and keeps transparency; avif = smaller still, slower to encode; jpeg = photos only, transparency becomes white; png = lossy palette compression that keeps transparency (or lossless=true for exact colours). Prefer webp unless the user needs a specific format. This is also the tool for converting between formats ("convert to WebP/AVIF/JPG/PNG"): set `format`. To change the pixel dimensions, use `resize` instead (it can change the format in the same step).

Change an image's pixel dimensions, keeping its proportions, on-device (same high-quality resampler and encoders as ruah.tools). Give exactly one of max_side (the longest side in pixels — e.g. 1920 for web pages, 1080 for social posts, 640 for thumbnails) or percent. It never enlarges unless allow_upscale is true. Saves a new file and reports the size before and after; the original is never changed. The output is also compressed with the same format/quality options as `compress`, so "make it 800px and WebP" is one call.

Cut an image down to an aspect ratio or an exact region, and/or turn it by quarter turns or mirror it, on-device (same tool as ruah.tools/crop: whole pixels moved, never resampled). aspect_ratio keeps the largest centred area of that shape (e.g. "1:1" for a square profile picture, "16:9" for a video thumbnail, "4:5" for a portrait post). box keeps an exact region, in pixels of the input as it is shown (upright). rotate and the flips work alone or together with either. Saves a new file and reports which region of the input it kept; the original is never changed. To change the pixel size use `resize`; to change only the format or file size use `compress`.

Enlarge an image 2× or 4× with on-device AI super-resolution (the same models as ruah.tools/upscale — the image never leaves this computer). Unlike `resize`, it redraws detail and crisp edges instead of stretching pixels into blur. Made for small or low-resolution images: icons, thumbnails, old web images, small product shots. Saves a new file and returns its path plus a small preview; the original is never changed. The result is limited to 16.8 megapixels (4096×4096): ×4 fits inputs up to about 1000×1000, ×2 up to about 2000×2000. To make an already large photo bigger, use `resize` with allow_upscale. Time grows with the output: small images take seconds, ×4 of 1000×1000 a minute or more. Transparency is kept: a transparent logo, icon or cut-out comes back transparent, with no dark fringe (save as png, webp or avif to keep it). The first ×2 call downloads an 8 MB model once, the first ×4 call 55 MB.

Remove hidden metadata from an image before sharing it, on-device (same cleaner as ruah.tools): EXIF (GPS location, camera and device, date taken), XMP, IPTC, comments, embedded thumbnails and extra data such as motion-photo video. JPEG and PNG are cleaned losslessly — only the image data and its display settings (colour profile, orientation) are copied, not re-encoded — so the photo looks exactly the same. Other formats (HEIC from an iPhone, AVIF, GIF, …) are rebuilt from their pixels with no metadata at all: WebP stays WebP, images with transparency become PNG, photos become JPEG (quality 92). Saves a new file; the original is never changed. The result lists what was removed (e.g. a GPS location) and what is left — no need to check with other tools. Use for "remove EXIF", "strip GPS / location", "clean metadata before posting".