Image resizer
Use OmniToolbox as a practical image resizer for form uploads, profile photos, ID images, certificates, and online applications. Set dimensions, crop the useful area, choose a background color, and download a smaller file.
Many websites ask for exact image dimensions or a maximum file size. The image tool lets you type pixel width and height, crop the image area, choose output format, and target a KB limit. The best workflow is to crop the useful part first, resize to the required dimensions second, and compress last so quality is not destroyed unnecessarily.
Some portals require a white, blue, red, or plain background. Choose a background color before export so cropped or transparent areas render cleanly. This is especially important for profile photos, document scans, and signatures where uneven edges or transparency can cause a form upload to fail.
The original and output previews help you compare size, format, dimensions, and visible quality before using the file. A technically small image is not useful if the face, text, stamp, or signature becomes unreadable, so the preview is part of the workflow rather than decoration.
JPG and JPEG are usually the safest choices for photos, profile pictures, and application images because most upload portals accept them. PNG is better when text edges, diagrams, or transparency matter, while WebP can be smaller when the receiving website explicitly supports it. The tool keeps format selection visible so users do not accidentally create a file that the next website rejects.
The workflow supports both maximum file size targets and compression percentage controls. Use a KB target when a form gives a strict upper limit, and use percentage compression when you mainly want a lighter version while keeping visual quality. The preview and final file details make the result checkable instead of relying on trial and error.
Dimensions, photo compression, background color, crop controls, and signature presets are kept in one image workspace because those steps are often part of the same upload rule. A form may ask for a 300x300 photo under 100 KB and a 140x60 signature under 20 KB; using one processor keeps the order of operations consistent.
Do not overwrite the original photo or signature until the receiving website accepts the final file. If a portal rejects the output, the original lets you retry with a different crop, format, or compression level without compounding quality loss from repeated saves.
Upload the image, enter the required width and height, crop if needed, select the output format, and run Crop, resize and compress.
Yes. Use the background color picker or color swatches before processing the image.
Yes. Choose Max size mode and enter the target KB value such as 50 KB, 100 KB, or 200 KB.