Image optimiser and converter

Optimise and convert

Drop, paste (Cmd/Ctrl+V), or choose one or more images. Pick one in the strip to edit it; the output settings apply to every image.

Format and quality — WebP and AVIF usually give the smallest files; AVIF is only offered if your browser can encode it. PNG is lossless, so it has no quality setting.
Resize — Fit keeps the image inside a maximum width and height (it never enlarges); Width, Height, %, and Exact do what they say. Big reductions are done in halving steps for sharper results.
Rotate and flip apply before resizing. Background fills transparent areas when saving as JPEG.
Crop — turn it on, choose an aspect ratio (or Free), and drag a rectangle on the image.

The preview compares the original and the output: drag across the Slider view, or switch to side by side. The size badge shows how much smaller (or larger) the output is. Cmd/Ctrl+Enter downloads the current image; Download all as ZIP encodes the whole batch.

Metadata

EXIF data in JPEGs — camera, lens, exposure, date, software, and GPS location — is shown so you know what the original carried. Every output is re-encoded from pixels, so all metadata is removed. Orientation from EXIF is applied before editing.

Palette

The dominant colours (median cut), with their share of the image. Click a swatch to copy its hex value, or copy them all as CSS custom properties.

Favicon and app icons

Generates PNG icons at 16–512 px (including apple-touch-icon.png and the Android Chrome sizes), a multi-resolution favicon.ico (16, 32, 48), a site.webmanifest, and the <link> tags for your page — all in one ZIP. Fit inside keeps the whole image; Fill crops to a square. Add padding or a background colour for icons that need breathing room.

Nothing is uploaded: decoding, editing, and encoding all happen in your browser.