Website and article hero images
Check the real pixels needed for a high-density display, not only the CSS layout width. A source that is 800 pixels wide becomes 1600 pixels at 2x, making the relationship to the final placement easy to calculate.
PIXEL-FIRST UPSCALING
Enlarge an image from the pixel dimensions you actually need.
Image enlargement is a dimension decision: choose the output width and height required by a layout, listing, social post, or print. Kogashitsuka AI offers original-size processing plus 2x and 4x upscaling, with the planned output shown before processing.
This page is the transactional route for choosing a scale and opening the real uploader. For an explanation of interpolation, AI upscaling, and why blur appears, follow the dedicated editorial guide below.
Original2x / 4x
START WITH OUTPUT
Choose the destination before choosing the multiplier
A larger number is not automatically a better output. Balance target width and height, viewing distance, file size, and the amount of reliable detail in the source.
Commerce and product images
Allow enough room for zoom and cropping. If a product label is unreadable in the source, increasing output dimensions cannot be assumed to restore the correct lettering.
Social posts and banner assets
Match the platform's target dimensions while keeping the original aspect ratio. The upscaler does not create a new crop, so composition changes should be treated as a separate editing step.
Preparing a small image for print
Calculate pixels from the physical print size and required resolution. Changing a dpi field alone is not enough; make sure the actual width and height contain the pixels the print specification calls for.
SIZE IT IN THREE STEPS
Calculate the output from the input dimensions
Read the source width and height, apply the multiplier, then compare the result with product limits and the destination. A 1200 by 800 image becomes 2400 by 1600 at 2x and 4800 by 3200 at 4x.
1. Read the original width and height
After choosing a file, the uploader can display its input dimensions. Prefer the original camera or design export over a small copy saved from social media whenever that source is available.
2. Select 2x or 4x
Because both dimensions grow, 2x produces four times the pixel count and 4x produces sixteen times the pixel count. Start with the smallest multiplier that satisfies the real output requirement.
3. Inspect the output at 100%
Review contours, small letters, repeating textures, and boundaries at full size. Then reduce the image to its final placement and confirm that both visual quality and file dimensions fit the purpose.
DIMENSION NOTES
Practical notes for selecting a scale
Divide the desired width by the source width to estimate the multiplier. If a 900-pixel-wide source needs to become 1800 pixels, 2x is enough; choosing 4x would create more data than the layout requires.
Aspect ratio describes the relationship between width and height. When the destination uses another shape, enlargement alone cannot resolve empty space or overflow. Crop afterward or adjust how the layout displays the image.
AI upscaling may make some detail easier to see than basic interpolation, but it cannot guarantee that unreadable letters or absent textures become factually correct. Compare important documentary and product information against the source.
Repeated JPEG saves can compound compression. Preserve the source, group necessary edits before the final save, and balance visual quality with transfer size when the destination is the web.
WHAT SCALE CANNOT FIX
Problems that more pixels do not solve by themselves
More output pixels do not correct every capture, compression, or composition problem. Decide whether the result needs a separate crop, retouch, or replacement source.
Severe motion blur and defocus
When a subject boundary cannot be distinguished, a larger image may still lack an accurate contour. Compare against the source and do not assume new-looking detail is factual.
Aspect ratio and cropping
The 2x and 4x choices grow dimensions from the original shape. They do not turn a square composition into a wide one, so use a separate crop or layout adjustment when the framing must change.
Unlimited output dimensions
The service has input and output limits. Check the formats, edge limits, planned dimensions, and required points shown by the actual uploader before running a job.
ENLARGER FAQ
Questions to answer before making an image larger
Q.Should I choose 2x or 4x?
Divide the required width or height by the original dimension. If 2x reaches the target, begin there, inspect the result, and only consider another output when the destination genuinely needs it.
Q.Does 2x mean the file size also doubles?
Not necessarily. Doubling width and height creates four times as many pixels, while file size also depends on image content, format, and compression. Check the saved file rather than relying on a fixed ratio.
Q.Is this the same as changing dpi?
No. Dpi is used in relation to physical print dimensions, while the actual information also depends on pixel width and height. Confirm both the final print size and the required pixels.
Q.Where can I learn why enlarged images blur?
The linked editorial guide explains standard interpolation, AI upscaling, common causes of blur, and what to inspect. This page stays focused on choosing dimensions and opening the processing workflow.
KEEP INTENT CLEAR
Subject-specific checks and an explanatory enlargement guide
This route is for increasing output dimensions. Use the focused pages for portraits, old photos, line art, and anime assets, or read the article when you need the theory behind enlargement methods.
Start by checking the planned output pixels
Choose an image in the actual homepage uploader to review its input size, selected multiplier, planned output dimensions, and required points before processing.