For a typical web landscape photograph, export a JPEG in sRGB at dimensions suited to where it will appear. Check the finished file in a browser before uploading it. A photograph can look clean inside Lightroom and still show color shifts, halos or compression artifacts in the delivered version.
Keep a full-resolution source and its edit. A smaller web export is a delivery copy, and you may need a larger size or different compression later. Repeatedly opening and resaving a compressed JPEG can further degrade it.
Start with the destination's dimensions
Find the image requirements for the actual website or publishing platform. Check whether the photograph appears as a small card, a wide banner or an image that opens larger. A file sized for a card can look soft when the same upload is displayed across a large screen.
Think in pixels for screen delivery. The pixel dimensions determine how much image information is available; changing a print-resolution number alone does not add detail for a web page. Avoid enlarging a small original just to reach an arbitrary export target.
For a site you control, several image sizes can let the browser choose an appropriate source. If you are preparing a single file for somebody else's platform, follow its specifications and test the uploaded result. That platform may resize or recompress it after upload.
Use sRGB for broadly compatible color
sRGB is a practical default for ordinary web delivery because it is widely supported. Select it in the export's color-space setting when that option is available. Keep the color profile embedded if the export settings provide that control.
Choosing sRGB during export converts the output colors into that space. Simply removing a profile or attaching a different label is not the same operation. Leave the original editing source intact so you can make other delivery versions when required.
A wide-gamut display can make color differences more apparent, but viewers will use many kinds of screens. Check the exported image in a color-managed application and a browser on your normal display. If the file looks different, investigate the output profile and viewing conditions before changing the creative edit.
Set JPEG compression by inspection
JPEG quality controls balance file size against compression damage. Their scales and behavior vary between applications, so one numerical setting does not guarantee the same result everywhere. Start with a reasonable setting and compare the file size with what the image actually looks like.
Landscapes place different demands on compression. Fine foliage can lose detail, while smooth skies may reveal bands or blocky patches. Inspect both kinds of area. A small file that looks acceptable as a thumbnail may fail when opened larger.
Export two candidates with the same dimensions and different quality settings. Compare them at the intended viewing size, then inspect difficult details at full size. Keep the smaller one only if its visible compromises are acceptable for the destination. File size alone does not tell you whether the sky or leaves survived.
Check sharpening after resizing
Resizing changes how fine detail appears. If the exporter provides output sharpening for screens, use it cautiously and inspect the result. Sharpening that helps a small image can make high-contrast ridges or bare branches develop bright outlines.
View the exported file at its actual pixel size when checking artifacts. A browser or viewer that is scaling it again can obscure what the file contains. Then return to the expected display size to judge whether the photograph looks appropriately crisp.
The photography portfolio provides a place to study how images read at different sizes. For your own export, look at the visual hierarchy as well as fine detail: can the viewer still distinguish the subject from the background when the image is small?
Review metadata before sharing
Choose an appropriate metadata setting for the delivery. Review whether location information or other embedded details should remain in a publicly shared file. Preserve credits or copyright information when needed, while remembering that a platform can strip metadata after upload.
Use clear filenames that help you identify the delivered image and size. Avoid including private client details in a public filename. Keep the export in a separate folder so you can tell which files were approved and which were temporary tests.
Inspect the uploaded version too
Open the final export outside Lightroom and check its crop, dimensions and color. Look for clipped edges, dust spots and distracting details that were less obvious while editing. Use the sky and terrain in the Before the World Woke Up environment artwork as a visual reference for broad tonal separation. Inspect those relationships in your own export at the delivery size, then zoom in to check smooth sky gradients and fine foliage.
After uploading, check the page on a phone and a larger screen. Compare the image you see with the local export, particularly where the platform crops a preview or compresses the sky. Keep the source export so you can diagnose whether a problem began in Lightroom or appeared during publishing.