Image size adjustment
Adjust photos individually by pixels or ratio. Choose the width-to-height ratio and exact size, then save in preview.
Input and file are processed in this browser. It resets when refreshed.
Result
Check the result after input.
Share result
Share the tool link and result text together. No URL is included in the result. Check the below content and then share it.
How to use and processing criteria
This is the process of changing the horizontal·vertical pixels or ratio of a photo file.
Actual example
Resizing a 2,400×1,200 px image to 1,200 px wide produces 1,200×600 px. Fitting it within 800×800 px produces 800×400 px; setting an exact size of 800×800 px changes the aspect ratio.
Frequently Asked Questions
Which mode is used to maintain the horizontal/vertical ratio?
Align horizontally · align within horizontal/vertical ranges · original ratio mode maintains the ratio. Exact size is scaled up or down to pixels, which may distort the photo.
Can you reduce multiple photos to the same original ratio?
Select up to 10 pieces and use horizontal alignment or ratio based on the original. Calculate the ratio separately for each image. The result must be up to 6,000px in width/height and 24 million pixels, and details cannot be restored when zoomed.
Calculation criteria and reference materials
- MDN — Canvas image saving
JPEG Quality parameters and Blob output
Verification of calculation criteria: · Calculation·verification principles · Report errors