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Resize images to a file size limit

Set a file size limit in KB and exact pixel dimensions for your JPG or PNG, then check whether the output meets those requirements. Your original file remains unchanged.

See real samples and passing/failing outputs

1. Select an original

Up to 40 MB · 32 million pixels

Images stay on your device. Your original is preserved.

2. Enter requirements

1 KB = 1,024 bytes · Width and height are exact output dimensions.

In JPG output, padding and transparent areas are filled with white. In PNG output, padding is transparent and existing transparency is preserved. Center cropping may remove parts of the image’s edges.

JPG quality is reduced automatically if the file exceeds the size limit. This quality setting does not apply to PNG output.

3. Compare original and output

Original image
Original · entire image
Your result appears here
Result · image to download

Select an image and enter the requirements.

Reproduce file size and pixel requirements

These original geometric patterns contain no photos or personal information. Download the source files and reproduce the examples with this site’s tools.

Landscape checker pattern with a teal circle and a fine-detail band along the bottom
Landscape pattern
1200 × 800 px · 907,977 bytes
Download input sample
Semi-transparent teal circle on a transparent background
Transparent portrait shape
400 × 600 px · 4,642 bytes
Download input sample
  1. Download and select an input sample. Set the format, dimensions and maximum size from a card below, and choose Fit entire image with padding. Start JPG quality at 90%.
  2. Select Resize image and compare the original and output. A landscape image fitted to a portrait has padding above and below. Check the transparent corners and padding of the PNG.
  3. Check the actual output bytes, dimensions, format and requirement status before downloading. The 1KB case intentionally shows unmet requirements and should not be used for submission.

Landscape image to portrait JPG

Input: Landscape pattern

Settings: JPG · 600 × 800 · 80 KB · Fit entire image with padding · Starting quality 90%

Actual output: 65,252 bytes · 600 × 800 px

The specified maximum file size, dimensions and format were met.

Download the measured reference output

PNG transparency and square padding

Input: Transparent portrait shape

Settings: PNG · 256 × 256 · 64 KB · Fit entire image with padding

Actual output: 5,827 bytes · 256 × 256 px

The specified maximum file size, dimensions and format were met.

Download the measured reference output

Size limit exceeded at the same dimensions

Input: Landscape pattern

Settings: JPG · 600 × 800 · 1 KB · Fit entire image with padding · Starting quality 90%

Actual output: 7,997 bytes · 600 × 800 px

The size limit was exceeded. Dimensions and format were retained, but this file does not meet the specified size limit.

Download the reference that exceeds the limit

Padding and center cropping do not assess a submission site’s photo rules. Only change settings the submission site allows; check the subject, background and shooting conditions separately. These examples are not official specifications for an institution.

These figures describe actual downloaded files checked in the browser below. Encoders and PDF creation metadata can change file sizes and bytes. Check your own result using the tool’s actual metrics and downloaded file. Chrome 154.0.8037.58 · 2026-09-30

See a real example of combining images into a PDF

Limitations

One JPG or PNG at a time. Output: up to 4,096 px per side and 16 million pixels. Encoding can vary by browser. Enlarging a small original may blur it. EXIF, DPI and other metadata are not preserved. Animated PNG uses only the first frame.

This tool checks only file size, pixel dimensions and format. It does not assess the subject, background or shooting conditions, or guarantee acceptance as a passport photo or compliance with legal requirements.

Privacy

Images are processed in your browser. The conversion tool does not upload selected images or filenames to a server, store or log them on a server, or include them in analytics or advertising events. The site separately handles theme preferences, advertising, consent management, traffic statistics and hosting access logs. See the site’s privacy policy for details.