A phone can store a photo’s pixels sideways and add an EXIF orientation instruction telling apps how to display it. If a converter ignores that instruction, the PDF page can turn even though the photo looked correct in the gallery.
A reliable conversion normalizes orientation before placing the pixels on the PDF page.
Check the images first
Open each photo, rotate it if necessary, and save the edit. For important documents, crop distractions and confirm that text is sharp before conversion. HEIC support varies by browser, so JPEG or PNG is the safest interchange format.
Convert in the intended order
Choose Images to PDF, select the photos, and arrange the preview cards. The converter should read embedded orientation metadata, normalize the image, and choose portrait or landscape from the corrected dimensions.
- Do not rely only on the thumbnail shown by the phone gallery.
- Check every page in the resulting PDF.
- If one legacy image is wrong, export a fresh copy as JPEG and retry.
Why browser and phone results can differ
Browsers and image libraries have not always handled EXIF orientation identically. Modern browser image decoding can honor orientation metadata, but the server-side conversion must do the same. That is why testing the downloaded PDF—not just the upload preview—is essential.