Resize an iPhone photo to exact pixels: crop first

Steps in Lighten

1. Confirm width and height

   Write down the required width and height in pixels. 600 × 800 means 600 pixels wide and 800 tall; 800 × 600 is a different frame. Check whether there is also a format or file-size requirement.

2. Choose an ordinary photo

   Import a still photo from Photos or Files in Lighten. Live Photos currently keep their original format and dimensions, so this exact-size walkthrough is for ordinary still photos. The source stays unchanged.

3. Enter the exact dimensions

   Open the pixel-dimensions setting, choose exact width and height, and enter both values. Keep the original format unless a change is required. Add a file-size limit only if the destination specifies one.

4. Choose what stays in the frame

   For 600 × 800, the crop frame locks to 3:4. Pan and zoom, or use the position and zoom sliders to adjust the photo. Rotate or swap width and height when needed. Check the orientation and subject placement before confirming; the initial frame is not consent.

5. Confirm and prepare the copy

   Explicitly confirm the framing before processing, including when the source already has the target ratio. If the selected source area is too small, enlargement requires your consent. It adds pixels, not genuine detail.

6. Check the output and save

   Verify the actual integer width and height on the result screen, along with the byte count and image details. Check that important text, faces and edges were not cropped incorrectly, then save to Photos or Files, or share the separate result.

Why confirm the crop first?

The source and target may have different aspect ratios. Stretching a landscape photo into a portrait frame distorts it, while an automatic center crop may remove something important. Manual framing lets you decide which content stays.

Lighten prepares the exact-size copy from the confirmed area of the source. The size of the on-screen frame and the selected source-area pixels are different from the output dimensions. Check the actual width and height on the result screen.

Exact dimensions or a longest-edge limit?

Use exact dimensions when the requirement specifies both W and H, and confirm the locked-ratio framing. Use a longest-edge limit when only a maximum edge is given; it keeps the aspect ratio and scales down proportionally.

A single side or maximum boundary does not define an exact aspect ratio. Check the destination’s requirements before cropping content unnecessarily.

How can I keep the whole photo?

When the ratios differ but the output must have an exact width and height, you can explicitly choose Fit with borders. Preview the full photo and border color before confirming. The destination must allow borders; they are never added silently.

If neither cropping nor borders are allowed, clarify the required dimensions. Stretching or automatically generating a background is not a substitute for that decision.

What if there is also a tight file-size limit?

Pixel dimensions and file size are separate constraints. Lighten checks the actual output dimensions and byte count rather than treating an estimate as a pass. You still need to inspect the image for acceptable detail.

If the confirmed framing and fixed pixels cannot meet the byte limit, Lighten reports failure. Adjust the compression preference or requirements you are allowed to change; it will not silently turn 600 × 800 into a smaller size. Changes to target dimensions, orientation or framing need a new confirmation.

Do I need Pro for one photo?

Single-file processing, manual cropping and comparison are available within the daily free allowance. Pro is a one-time upgrade for batch efficiency and higher usage limits. Each exact-size file still needs its own framing confirmation.