Review a collection without opening every photo
A contact sheet presents small versions of several images on one larger page. It is useful for selecting photographs, documenting a product batch, reviewing design alternatives, or sending a visual index to someone who does not need every original file immediately. Unlike a decorative collage, its main purpose is comparison and identification. Consistent cells and readable labels let a reviewer refer to an image without guessing which attachment you mean.
This maker accepts a group of supported image files and arranges them in a regular grid. You choose the column count and thumbnail cell width, and you can include source filenames beneath the pictures. The result is a single JPG rather than a folder of resized originals. The source files remain separate. Use the sheet as an overview and keep the originals available for any image that needs detailed inspection, editing, or publication.
Choose a useful grid and readable labels
More columns make the sheet wider and can reduce the amount of scrolling in a long collection, but they also change how large the images appear when the sheet is fitted to a screen or printed page. A small group may work well with two or three columns; a larger review can benefit from a denser layout. The cell width is measured in pixels, not millimetres, so the final physical print size depends on the print settings.
Filenames provide a practical reference when the reviewer must identify a preferred image. Short, meaningful names work better than a long camera-generated prefix followed by several duplicate suffixes. Labels that exceed the cell width are shortened visually to stay within the layout. If the entire filename is essential for an audit, keep a separate manifest alongside the sheet. Turning labels off produces a cleaner visual overview, but makes it harder to communicate an exact selection from a large batch.
Preserve proportions instead of forcing a crop
Portrait and landscape images can share the same grid without being stretched. Each picture is scaled to fit its cell while preserving its aspect ratio, and unused space stays white. This makes the sheet suitable for mixed collections where cropping would remove important context. The tradeoff is that a very tall or very wide image occupies less of its square cell than a photograph with a more balanced ratio.
The exported sheet is a raster overview, so details that were visible in a full-resolution original may not remain readable. Do not use a tiny contact-sheet thumbnail as evidence that a document's text is legible or a product has no defects. Inspect the individual source for those decisions. The JPG output also flattens transparent areas onto white. If a transparent design needs to be reviewed against a particular background, prepare a suitable review copy first and identify that treatment in your notes.
Plan file order and review the final sheet
A useful sheet tells a reviewer what they are looking at. Prepare the selection in a deliberate order and check the generated layout before sharing it; file pickers and operating systems can present selections differently. For a product review, group related views together. For a design comparison, use filenames that distinguish revisions. Avoid mixing private source photographs into a public review merely because they were selected in the same folder.
This tool limits the number of files and the total output dimensions to avoid creating an image that overwhelms a mobile browser. If a collection is too large, divide it into sensible batches rather than shrinking everything until it becomes unreadable. Open the downloaded JPG and inspect the first and last rows, the labels, and the spacing. For print use, make a sample at the intended size. A contact sheet is most valuable when another person can identify the right original without asking you to reconstruct the entire selection process.
Keep a reliable image workflow
Keep the original photograph in a separate folder before making an edited copy. A downloaded result should have a name that describes its purpose, such as a submission photo or a review sheet, rather than replacing your camera file. Check the result in the program or website that will actually receive it. An image can look correct in a browser preview yet be rejected because the receiving service expects different dimensions, a different format, or a smaller byte count.
Browser image exports create new pixel files. They should not be treated as preservation copies of the source, and embedded camera information, color profiles, or print settings may not survive. When color accuracy or documentary integrity matters, retain the source and use an appropriate professional workflow. Canvas rendering can also vary slightly between browsers, especially for fonts and color management.
Images selected for this tool are processed on your device rather than sent to a conversion server by the tool. The website still needs to load its page and scripts, and ordinary website requests are separate from image processing. On a shared computer, remove sensitive downloads when finished. Close the page to release its working memory, and avoid opening several large photo jobs at once on a phone.
For a final check, open the downloaded file rather than only examining the working preview. Confirm that the filename extension agrees with the intended format and that the subject has not been clipped. If the picture will be printed, review a physical sample. If it will be uploaded, inspect the receiving site's own preview. Keep notes about successful dimensions and size limits for repeat submissions instead of repeatedly recompressing the same image.
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Frequently asked questions
Does a contact sheet change my original photos?
No. The tool reads the selected files and creates a separate combined JPG. Keep the originals for full-resolution review or later editing. The small pictures on the sheet are previews and should not replace your source archive.
Why are there white spaces around some images?
The tool preserves each image's aspect ratio instead of stretching it to fill a square. Portrait, landscape, and unusually wide files leave different amounts of unused space. This protects the full visible content at the expense of a perfectly filled grid.
Can I use the sheet for printing?
Yes, but set the physical print size in your printing application and inspect a sample first. Pixel dimensions do not guarantee readable labels at every paper size. Split a large collection across several sheets if the thumbnails become too small.
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Reference and further reading
MDN's Canvas API guide provides background on the relevant format, technology, or requirements. External services have their own policies and may change independently of this page.