Resize images to Facebook cover photo size

Cropping is the cheapest quality decision available: removing the table around a document, the ceiling above a portrait, or the empty margins of a signature costs nothing and makes whatever compression you apply afterwards more effective, because every remaining byte describes something you wanted.

It is also how aspect ratios are honoured. Platforms crop to their own frames when you upload, and they do it without asking — cropping deliberately means you choose what survives.

For document work the payoff is measurable: a signature photographed with three inches of blank paper around it spends most of its file size on the paper, and the portal's byte window is spent on nothing.

This tool exists for images handled in a hurry: no queue, no account, no upload, and a result you can verify on the spot. The explanation below is the same one we would give a colleague who asked how it works.

Choose the format from what the image is, not from what is fashionable. A photograph is a smooth continuum of tone, which JPEG handles beautifully and PNG handles expensively. A screenshot, a logo, a signature on white paper or anything with a small palette is the opposite: PNG compresses it losslessly to a fraction of what JPEG costs, and keeps the hard edges hard. WebP and AVIF are excellent for the web and are still frequently refused by government and bank upload widgets.

Pixels, DPI metadata and physical print size are distinct. For example, 35 mm at 300 pixels per inch is approximately 413 pixels, but pixels alone cannot guarantee a printer produces a 35 mm image. If the instructions also require DPI metadata or a measured print, check those separately.

Accepted inputs are JPEG, PNG, WebP, AVIF, HEIC, GIF and BMP images up to 50 MB each. SVG, HTML and other script-bearing formats are refused outright rather than sanitised, because a file that can execute code has no business being re-encoded — and an upload field that accepts one is a security hole rather than a feature. Several files can be queued where the workbench supports it. Batch, page and memory limits apply; check every output.

The crop rectangle is mapped from the preview onto the decoded source at full resolution, so no intermediate re-encoding happens between the original and the cropped output. Fixed presets are expressed as ratios rather than pixel sizes, which keeps them valid whatever the source dimensions. Transparency is preserved for PNG output, and EXIF orientation is applied before the crop so a portrait photograph is not cropped on its side. The crop is applied to the decoded source at full resolution rather than to the preview, so the pixels you keep are never a re-encoded copy of themselves. Fixed-ratio presets constrain the frame while you drag, which is what stops the almost-right aspect ratio that platforms crop again on upload to their own standard.