Join photo and signature on one white sheet

Some applications request a photograph and signature together. Confirm whether the current authority actually accepts a combined sheet before making one.

Enter the desired physical sizes as a layout reference. The photo is centre-cropped; the signature is fitted with padding to keep the whole source visible.

Print scaling and JPEG DPI metadata can change physical dimensions. Set the sheet to 210 × 297 mm on A4 and measure the output; acceptance is not guaranteed.

A handful of portals ask for photographs and signatures on one sheet, usually so that a single scan or upload serves both fields. Assembling that sheet by hand in an image editor is fiddly; specifying two images and getting the layout right takes seconds.

Printed practice sheets are the other use: a sheet of photographs and signature strips that you print once, sign and then scan or hand in. Get the millimetre sizes right and the print fits the box on the form.

Both images being joined are personal identifiers, which is precisely the case for doing it locally rather than on a site that wants to see your face and your signature to produce the file.

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.

On a phone, memory is the real constraint rather than any size limit. A 12-megapixel photograph is about 36 MB once decoded into pixels, so compiling a batch of twenty and holding every result in memory at once will get a mobile browser killed well before it runs out of storage. Process batches of ten to fifteen on a phone; on a laptop the same job is unremarkable.

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 layout uses a 2480 × 3508 pixel A4-proportioned canvas with object sizes converted from millimetres at a nominal 300 pixels per inch. The JPEG does not guarantee 300 DPI metadata or actual print size. The images are processed on the device. Each image is decoded, oriented by its EXIF tag and scaled to the slot dimensions with progressive halving, then composited onto a white canvas at the spacing you chose. Subject matter is never stretched: scaling preserves the aspect ratio and centres the result in its slot, so a signature drawn on a wide scan does not become tall and thin. Output is written as a single JPEG at the canvas dimensions, which is what portrait-format forms expect. The sheet is composed onto a white canvas at the exact dimensions you specify, and each image is scaled proportionally rather than stretched, so faces keep their proportions even when the two slots have different aspect ratios. Printing needs actual-size output rather than fit-to-page, which is the single setting most often responsible for a photograph that does not fit its box.