Blog Post Images: Choose, Optimize and Review Useful Visuals

A useful blog image explains something the reader needs to understand. Choose a screenshot, diagram, photograph or chart for a clear purpose, then check its rights, accessibility, file size and mobile presentation. More images do not automatically mean more traffic or conversions.

A screenshot can show where to find a control. A diagram can explain a process. A chart can make a comparison easier to inspect. Decorative artwork may establish a visual style, but it should not be presented as evidence of a product feature or customer result.

Start with the job the image must do

• Show an action: use a current screenshot with a concise explanation of the step.
• Explain a relationship: use a diagram and include the important relationships in nearby text.
• Compare quantities: use a labeled chart with its source, units, time period and limitations.
• Show a real object: use a photograph that accurately represents the item or setting.
• Identify the article: choose a featured image relevant to the page, then check its sharing crop.

There is no universal rule requiring an image every 300 words. Add a visual where it helps the reader complete a task or understand a point. Remove images that repeat the same decoration while adding page weight.

Use current screenshots without exposing private information

Capture the actual product view you are explaining. Check that the selected workspace, feature and labels match the article. Remove credentials, private customer information and unrelated records before publishing.

Crop to the relevant area while keeping enough context to locate it. If you add arrows or highlights, use them sparingly. Keep the instruction in the article text as well so readers do not have to decipher small text inside an image.

Check rights before editing or publishing

Keep a record of the creator, source, license or permission and any required credit. Being able to download an image does not establish permission to publish it commercially. Adding text, cropping or recoloring someone else’s image does not itself grant rights.

For generated illustrations, check the applicable terms and the final result. Do not fabricate a product screenshot, customer testimonial or documentary image and present it as real evidence. Label illustrative examples where that distinction matters to the reader.

Write alternative text for the image’s role

The W3C alternative-text decision tree distinguishes informative, functional and decorative images. Describe meaningful content, explain the action of an image-only control, and use an empty alternative for purely decorative images. Provide complex information in nearby text.

For example, “RankWell editor showing the article and search preview” explains a product screenshot. Repeating a target keyword without describing the image does not. A chart needs its important values and interpretation outside the image, not a long string of keywords.

Use the description needed for the context rather than imposing an arbitrary character limit. A caption can add the capture date, source or limitations without forcing all that detail into alternative text.

Resize and compress without losing the point

Check dimensions and file size separately. Dimensions describe the image’s pixel width and height; file size is the amount of data transferred. Choose a suitable output for its displayed size and inspect the compressed result.

• Keep screenshot labels legible at the size readers will see.
• Use responsive sizing so an image fits a narrow screen.
• Preserve the aspect ratio rather than stretching the image.
• Compare appropriate formats and compression settings using the actual file.
• Give the file a meaningful name and keep its source record.

A hypothetical six-image article originally uses six 1.2 MB files, totaling 7.2 MB. If each reviewed replacement is 150 KB, the six files total 900 KB, about 87.5% less image data using decimal units. That is a file-size calculation, not a measured page-speed or conversion improvement.

Load images according to their place on the page

Browser-level lazy-loading guidance explains deferring offscreen images and cautions against delaying likely in-viewport or Largest Contentful Paint images. Give images explicit dimensions to reserve their space. Ask the site’s technical owner to verify the rendered behavior.

Check the featured image and below-the-fold images separately. Compressing a file and changing loading behavior solve different problems. Test a real published page rather than assuming that every image should use the same settings.

Review images in the current BrandWell workflow

In RankWell, review media alongside the article, sources and search preview. Select visuals that support the draft’s actual instructions, check rights and add useful text descriptions. Verify the public page after publishing through your configured connection or moving approved content into your site’s editor.

Keep a short media review record: purpose, source or rights, capture date, alternative text, caption, exported dimensions and the result of the mobile check. This makes later updates easier when the product interface changes.

A final image acceptance checklist

1. Does the image explain a relevant point accurately?
2. Are its rights and required credit recorded?
3. Are screenshots current and free of private information?
4. Can the reader understand essential information without relying on tiny embedded text?
5. Is the compressed image clear at its displayed size?
6. Does it fit on mobile without overflow or distortion?
7. Does the featured image produce a suitable social sharing crop?
8. Does the public page load the image with the intended behavior?

Frequently asked questions

Is JPEG always the best format?

No single format is best for every image. Compare the actual output for clarity, size, transparency needs and browser support. A photograph and a screenshot can need different treatment.

Should every image have descriptive alternative text?

Choose the alternative according to its role. Decorative images use an empty alternative; meaningful images need an appropriate description or equivalent information.

Can I add a video instead?

Use video when motion or narration helps explain the task. Provide the relevant accessible text or captions and consider loading cost. Video is not automatically a better choice than a clear static image.

Explore RankWell to prepare content with visuals your team can review and maintain.

Reviewed and updated October 3, 2026.

Written by

Julia McCoy

Julia McCoy has contributed articles to BrandWell on content marketing, writing, and search engine optimization. This archive retains her original bylines; individual articles may be updated by the BrandWell editorial team.