Image tools

Image work that stays on your device

Images are the files people convert most often and think about least. A phone saves HEIC that Windows will not open. A website serves WebP that an image editor rejects. An upload form caps files at 500 KB and the photograph is four megabytes. Each of these is a small, annoying problem, and the usual solution is to search for a converter and upload the image to whichever site ranks first.

That is a reasonable habit for a holiday snapshot and a poor one for what people actually convert. Photographs of passports, driving licences, signed forms, utility bills, medical letters, and bank correspondence make up an enormous share of image conversion, because photographing a document with a phone is the fastest way to get it into a computer. Those images then need converting precisely because the phone saved them in a format the destination will not take.

Everything here runs on the canvas in your browser. HEIC is decoded by a WebAssembly build of libheif bundled with the page, which is why it works on Windows and Android where the operating system has no HEIC support. JPEG, PNG, and WebP encoding use your browser's own image pipeline. Zip archives are built with fflate. No image is transmitted at any point, and you can confirm that in the Network panel of your developer tools.

Choosing the right format

The three decisions that matter are format, dimensions, and quality, in that order. JPEG for photographs and anything that must open everywhere. PNG for logos, icons, screenshots, and anything with transparency or sharp text. WebP when the destination is a website, where it is typically 25 to 35 percent smaller than JPEG at the same quality.

Dimensions matter more than most people expect. A 4000-pixel-wide phone photograph displayed in a 600-pixel column is carrying roughly forty times more data than it needs, and resizing it will do far more for the file size than any amount of quality tuning. Reach for compression second, and use its target-size mode when you have a hard upload limit rather than guessing at a slider.

Everything in image tools

• HEIC to JPG — iPhone photos into JPEGs anything can open.
• HEIC to PNG — iPhone photos as lossless PNGs.
• Image to JPG — Any format in, JPEG out.
• Image to PNG — Any format in, lossless PNG out.
• Image to WebP — Smaller files for the web, transparency kept.
• PNG to JPG — Shrink PNGs into JPEGs for sharing.
• JPG to PNG — Lossless copies for editing.
• WebP to JPG — Make downloaded WebP files usable.
• WebP to PNG — Keep transparency that JPEG would destroy.
• AVIF to JPG — Open AVIF files anywhere.
• SVG to PNG — Render vector files at any resolution.
• Compress Image — Hit a size limit without guessing.
• Resize Image — Exact dimensions, or a percentage.
• Crop Image — Drag a selection, or lock an aspect ratio.
• Favicon Generator — Every icon size a site needs, in one zip.