Crop a JPEG, download it, reopen that copy to change brightness, then export JPEG again: repeated rounds can add avoidable compression artifacts. Preserve the original and work from the best available source before choosing a final delivery file.
Re-exporting is the relevant step
Adobe explains that JPEG discards some image data and recommends making JPEGs from the original rather than a previously saved JPEG. Higher quality reduces loss but does not make JPEG lossless.
Viewing or copying unchanged bytes without re-encoding is not the same as saving a newly encoded image. Editing and exporting through the photo editor creates a new result file.
We recommend comparing lettering, thin lines and product details against the original. A larger output file alone is not evidence of better quality.
Plan the next step
| Next task | Our suggested approach |
|---|---|
| Trying several crops or brightness settings | Start each new version from the original |
| Passing the image to another editing tool | Consider PNG as an intermediate copy |
| A destination requires JPG | Export JPG when ready, then inspect it |
| Text and sharp line work matter | Compare their edges after export |
MDN describes PNG as lossless, but that applies to the image data being saved. It does not recover lost JPEG detail or undo cropping and resizing.
Work in FileMyLove
- Keep the source separately from output files.
- Open the photo editor and finish adjustments before downloading.
- Compare the original and edited views, then choose PNG or JPG for the next task.
- Open the download and inspect framing and important detail.
- For another version, return to the original rather than a repeatedly compressed copy.
The editor reduces the opened image to a maximum long edge of 2,048 pixels for processing. PNG therefore does not imply original resolution for a larger image. Downloading clears the image and editing settings, so keep the source yourself and note settings you need to reuse.
Decide what must be preserved
If a large print requires every source pixel, use an editing workflow that preserves the necessary resolution. FileMyLove prepares image copies within the limits above and processes them in your browser without uploading them.
See JPEG artifacts around screenshot text and PNG versus JPG transparency when choosing delivery formats.
