Meet an image upload limit: format, dimensions, then file size

1. Separate the three requirements

“JPG, maximum width 1,600 pixels, under 2 MB” contains three independent checks. Renaming an extension does not convert a file, and resizing to 1,600 pixels does not guarantee a 2 MB result. Keep the original and satisfy each requirement explicitly.

2. Decide whether transparency matters

A transparent logo or signature cannot retain transparency in JPG. The image editors fill those areas with the background color selected in advanced settings, which defaults to white. Compare JPG and WebP for photos, and consider PNG for transparent artwork or small text. The destination’s accepted formats always take priority.

3. Remove unnecessary pixels first

With the original aspect ratio locked, a 4,000 × 3,000 image resized to 1,600 pixels wide becomes 1,600 × 1,200. That may be sufficient for a small web display. Enlarging a tiny source, by contrast, does not restore lost detail; obtain a better original when possible.

The resize screen also lets you choose output format and quality. When you know the target width, combine these choices in one export to avoid needless encoding passes.

4. Treat quality settings as trial values

An 85% setting does not produce the same file size for every photo. Make a candidate from the original, inspect edges and lettering, and compare a 65% candidate if necessary. Start each attempt from the original, including when trying a higher setting.

• Inspect at the intended display size and at full size.
• Compare the actual downloaded size with the upload limit.
• If the result is larger, check whether the original already meets the requirements.

5. Inspect visual side effects

These tools save a static image without copying the source metadata. They are not an archival workflow for animation frames, camera information or specialized print profiles. Reopen the saved file to check orientation, color and transparent edges, especially when switching to a white JPG background.

6. Keep a useful comparison record

Put width, format and quality in candidate filenames, such as photo-1600-webp-85 and photo-1600-jpg-85. Choose the smallest acceptable result that still retains the detail needed for the destination. This table is a record template, not a measured compression benchmark.