Merge Photo and Signature into One JPG

Add your photo to the left slot and your signature to the right slot, then pick whether the signature sits below the photo or beside it. The combined JPG renders immediately and updates every time you change a setting. Stacked is the layout most application forms expect, because a photo box is usually taller than it is wide and the signature strip runs along the bottom. Beside works when the form wants a wide landscape image. Set the output width and height in pixels, choose a maximum file size if the form specifies one, and download. Nothing is uploaded at any point. The whole merge runs on an HTML canvas inside your browser, so the speed depends on your device rather than a server queue, and a typical 600x800 output finishes in well under a second.

Usually yes. Pick the 50 KB preset and the tool searches for the highest JPG quality that still lands under 51,200 bytes, holding your pixel dimensions fixed. It runs eight passes of a binary search between quality 35 and 95, so the result is the best-looking file that fits rather than an arbitrary low setting. A 600x800 photo and signature merge typically lands around quality 60 to 75 at that target. Where it fails is large dimensions: asking for 50 KB at 2000x2600 px is not achievable without visible blocking, and the tool says so explicitly instead of silently handing you an oversized file. When that happens you get the measured floor size and an optional button to shrink dimensions. A photo signature joiner under 50KB only helps if the face is still recognisable, so check the preview.

Type the width and height in pixels into the two boxes under the layout controls. The range accepted is 50 to 5000 px per side. The photo fills its region using a cover fit, meaning it is cropped rather than squashed when its aspect ratio does not match the box, which keeps faces from stretching. Use the zoom and position sliders under photo framing to decide which part of the photo survives that crop. The signature behaves differently on purpose: it scales to fit entirely inside its region and is never cropped, because a clipped signature is usually rejected. If you do not know what size to use, check the form instructions first. Many Indian government portals want 200x230 px for the photo area, while most Western visa forms work from physical millimetres instead of pixels.

No. Both images are read with the browser FileReader and object URLs, drawn onto a canvas element, and encoded with canvas.toBlob. None of those steps involve a network request. You can verify it yourself: open developer tools with F12, switch to the Network tab, clear it, then merge and download. You will see zero outgoing requests carrying image data. This matters more here than on most tools, because identity documents and specimen signatures are exactly the files you should not be handing to an unknown server. The tool also remembers your layout, dimensions and size limit in browser local storage so repeat submissions are faster, but it deliberately never stores the images themselves. Close the tab and both files are gone from memory with nothing left behind on disk.

JPG compression works on 8x8 pixel blocks and encodes gradual tonal change efficiently, which is the opposite of what a signature is. Thin dark strokes on white paper are high-contrast edges, so they are the first thing to degrade when quality drops below roughly 50. Two fixes. First, give the signature more room using the space slider, because a stroke rendered three pixels wide survives compression far better than one rendered a single pixel wide. Second, turn on the lighten paper option, which pushes the off-white scan background to pure white and deepens the ink, giving the encoder flat areas it can compress cheaply and leaving more bits for the strokes. Use the inspect control to view the signature at true output pixels before downloading. If strokes look broken there, a reviewer will see the same thing.

Then do not merge them. Plenty of portals have separate upload fields for photo and signature with different size limits for each, commonly 20 to 50 KB for the photo and 10 to 20 KB for the signature. Merging in that situation will get the submission rejected. Read the instructions before you combine anything. This page is for the other case, where the form asks for a single image containing both, or where you are printing a filled form and want one file to place. If you need the two kept apart but resized to separate targets, run each file through the JPG compressor linked at the bottom of this page. If you need several documents on one sheet instead, the general merge tool handles that better.

No, and it is fully reversible. Trimming and lightening are applied to a copy drawn on a separate canvas, so the file you selected is untouched on disk. Untick either checkbox and the next render uses the raw scan again, which is the undo. Trim scans for pixels with luminance below 190 to find the ink bounding box, then crops to it with a two percent margin so descenders and flourishes are not clipped. Lighten is a levels adjustment: anything at or above luminance 185 becomes pure white, anything at or below 40 becomes pure black, and the span between is stretched across the full range. Strokes gain contrast rather than every channel being lifted, which is what a plain brightness increase would do. Both options assume dark ink on light paper. If you signed in a pale colour on a dark or coloured background, turn them off, because the detection will read your background as ink and crop to the wrong area.

JPG, PNG, and WebP for both slots. A phone photo of a signature on white paper works, though a flatbed scan at 300 dpi gives cleaner edges because there is no perspective skew or shadow gradient across the page. PNG is the better source format for a signature if you have the choice, since it is lossless and has not already lost stroke detail to a previous compression pass. The output is always JPG, because that is what the overwhelming majority of application portals accept, and several reject PNG outright. Note that renaming a PNG to .jpg does not work: portals read the actual file header, not the extension. This tool re-encodes genuinely, so the downloaded file is a real JPEG regardless of what you put in.