Image Resizer

Using Image Resizer

Prepare an image for a document or upload form that has a pixel-dimension limit, without stretching it or uploading the source file.

How to use it

1. Choose a PNG, JPEG, or WebP image. Enter a maximum width, a maximum height, or both.
2. Choose the output format. For JPEG, choose the background that replaces transparent pixels; JPEG and WebP also expose a quality setting.
3. Inspect the original and output dimensions and actual file size, then download. Clear and reset removes the selected file and restores the defaults.

Worked example

Input and settings

640 × 480 image; maximum width 320; maximum height 100

Expected result

133 × 100 pixels, rounded to whole pixels. A 100 × 50 image within a 1280 × 1280 box stays 100 × 50.

Limits and common mistakes

• These are maximum bounds, not a crop box. The result may be smaller in one dimension to preserve proportions. Smaller images are never enlarged.
• Resizing pixels does not guarantee a particular file size in KB. Re-encoding can make a file larger; check the actual bytes before using it.
• Input limit: 25 MiB. Output-area limit: 16,777,216 pixels. A large source can still exceed device decoding memory even when the requested output is small.
• The output is a still image. Animation, metadata, and color profiles are not guaranteed to survive. Keep the original for archival and print use.

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