Nothing is uploaded. When you choose a file the tool creates a local object URL, decodes the image, crops and composites it on an in-page <canvas>, and downscales it with pica — all on your device. There is no server, API, database or tracking anywhere in the processing path, so your photo never leaves the browser. Object URLs are revoked when you reset or replace the image, the tool works offline once cached, and closing the tab discards everything. The only optional network use anywhere on the site is consent-gated advertising, which never sees your image.

These are three ways to fit a source image into a target that may have a different aspect ratio. COVER scales the image to fill the whole frame and crops whatever spills over, so there are no gaps and no distortion — this tool adds a position nudge so you can keep a face or subject in view on the cropped axis; it is the right choice for most posts and profile pictures. CONTAIN scales the whole image to fit inside the frame and pads the empty area with a colour or transparent background, so nothing is cropped — useful for logos or product shots that must show in full (and for Amazon-style pure-white backgrounds). STRETCH ignores the aspect ratio and forces the image to the exact dimensions, which can squash or stretch it, so use it only when the source already matches the target ratio.

Resizing down (a large photo into a smaller frame) stays crisp, and this tool uses pica’s Lanczos / mks2013 filter to avoid the aliasing you get from a naive canvas shrink. Resizing UP is different: if your source is smaller than the target size, the tool has to enlarge it, and no resizer — however good — can add detail that was never captured. The result will look softer than a natively-large image. The tool warns you when a chosen target would enlarge your source. For the sharpest output, start from an image at least as large as the target on both dimensions; for print-like sizes such as Etsy or Amazon 2000×2000, use a high-resolution original.

PNG is lossless and keeps transparency, so it is best for logos, text, screenshots and profile graphics — but files are larger. JPEG is a lossy photo format with no transparency; it produces much smaller files and is the safest universal choice for photographic posts, with a quality slider to trade size against sharpness. WebP is also lossy (or lossless) and usually the smallest of the three at a given quality, and every major network accepts it in 2026, though JPEG remains the most universally compatible fallback. This tool exports any of the three at exactly the target pixel size and shows the resulting file size live so you can pick the best trade-off. Note that transparent padding only survives in PNG or WebP — a transparent contain background exports white in JPEG.